Appellants are individuals who wish to carry placards opposing the policies of the Soviet and Nicaraguan governments in front of those governments’ embassies, located within the District of Columbia. In the absence of a permit, such protests are barred by D.C.Code § 22-1115 (1981). That same statute authorizes police to disperse congregations in front of embassies. Appellants asserted unsuccessfully before the district court that, on its face, this law violates the first and fourteenth amendments to the Constitution. They appeal the district court’s holding that the statute is constitutional and its grant of summary judgment for defendants.
The challenged statute regulates demonstrations taking place in front of foreign embassies (or buildings occupied by representatives of foreign governments) located within the District of Columbia. It contains several subsidiary provisions but for purposes of exposition it is sufficient to note its two primary features. The first makes it unlawful to “display any ... placard ... designed ... to ... bring into public odium any foreign government ... or to bring into public disrepute political, social, or economic acts, views, or purposes of any foreign government” within 500 feet of that country’s embassy, unless the demonstrators receive a permit to do so from the Chief of Police. The second feature makes it unlawful to “congregate within five hundred feet of any [embassy], and refuse to disperse after having been ordered so to do by the police authorities” of the District of Columbia.1
Speaking very generally, the first part of the statute — requiring a permit for the display of a sign tending to bring a foreign government into disrepute — is primarily intended to avoid affronts to the dignity of foreign governments and their diplomatic personnel. The second feature — prohibiting “congregating” — is concerned more with threats to the security of the foreign government’s representatives and property. Each of these main divisions of the statute is, of course, capable of serving both purposes mentioned. In both cases, the protection is limited to an area extend*1453ing 500 feet from the building. In Frend v. United States, 100 F.2d 691 (D.C.Cir. 1938), cert. denied, 306 U.S. 640, 59 S.Ct. 488, 83 L.Ed. 1040 (1939), this court rejected a first amendment challenge to section 22-1115 and upheld the provision’s constitutionality. In issuing the judgment we review today, the district court, relying in part on Frend, reached the same conclusion. Finzer v. Barry, Civ. Action No. 84-0899 (D.D.C. May 17, 1984), Record Excerpts (“R.E.”) at 62.
Our opinion is, unfortunately, quite lengthy, because in addition to presenting our analysis, it is necessary that we address the numerous and varied challenges to this statute advanced by appellants and the dissent. We hold that section 22-1115 passes constitutional muster, and we affirm the district court’s holding to that effect. We remand, however, for the limited purpose of addressing appellants’ claim that section 22-1115 has been enforced by local authorities against persons who were not in fact engaged in activities forbidden by the statute.
I.
Father R. David Finzer is the National Chairman of the Young Conservative Alliance of America, Inc., which he describes as “an organization of younger citizens who hold conservative views, and are dedicated to advocating and furthering those viewpoints.” Declaration of Father R. David Finzer, R.E. at 15. He and three co-plaintiffs — Bridget Brooker, J. Michael Waller, and Michael Boos — initiated this action in March of 1984 against the District of Columbia, the Mayor, and the Chief of Police. The United States was granted leave to participate as amicus curiae and supported the constitutionality of the statute.
Plaintiffs’ complaint and accompanying declarations state that they wish to conduct demonstrations of the sort described in D.C.Code § 22-1115 — they wish to carry signs critical of the Soviet and Nicaraguan governments within 500 feet of their embassies. Mr. Waller, for example, wishes to carry a sign bearing the words “Stop the Killing” in front of the Nicaraguan Embassy. Two of the plaintiffs claim to have been prevented in the past from demonstrating by uniformed police officers acting under the authority of section 22-1115. Additionally, they allege that the statute has been enforced against activity that was not in fact within its reach. Arguing that section 22-1115 abridges rights guaranteed by the first and fourteenth amendments to the United States Constitution, plaintiffs moved for summary judgment, seeking a permanent injunction against the provision’s enforcement and a declaration of its unconstitutionality.
Defendants opposed this motion and filed a cross motion for summary judgment. They filed accompanying declarations from David Fields, Deputy Assistant Secretary of State for Security; Thomas D. Quinn, Special Agent in Charge of the Office of Protective Operations of the United States Secret Service; James E. Nolan, Jr., Director of the Office of Foreign Missions, Department of State; and John C. Connor, Deputy Chief of Police and Commanding Officer of the Special Operations Division of the Metropolitan Police Department in the District of Columbia. The declarations of the two State Department officials noted that the responsibility of a host state to provide appropriate protection to foreign embassies within its borders is one codified and imposed by international law, and that the degree of protection afforded by foreign governments to American diplomatic personnel abroad depends in significant part upon the protection provided by our government to foreign diplomats living in Washington, D.C. It was the considered judgment of both men that diminshing the protection provided by section 22-1115 would have a serious and adverse effect upon the relationships between the United States and many other governments and would endanger American diplomatic personnel who live and work in other countries. The other two declarants stated, on the basis of their professional experience, that section 22-1115 was necessary to the *1454continued security of foreign embassies located in Washington, D.C. They explained that the task of protecting foreign embassies presented unique security problems, because — unlike, for example, when protecting the White House, the Capitol, or the Supreme Court — American police are prohibited from entering the premises. They may do so only upon the express prior approval of the foreign government, which, for obvious reasons, will rarely be given. The 500 foot buffer zone created by section 22-1115 compensates to some degree for the absence of any American police presence inside these buildings. R.E. at 36-58.
The plaintiffs did not submit any declarations in response. Instead, they filed a Statement of Material Facts in Dispute in which they claimed that they were entitled to summary judgment even if all the defendants’ declarations were accepted as true, and informed the district court that they did not wish to seek discovery at the time with respect to the factual contentions made in those declarations. R.E. at 59.
In a Memorandum Order issued on May 17, 1984, Judge Gasch granted defendants’ motion for summary judgment. He held section 22-1115 to be “necessary for the protection of the personnel and property of foreign governments located in Washington, D.C.” Finzer v. Barry, Civ.Action No. 84-0899, mem. op. at 3, R.E. at 64. He found that the statute served to fulfill American obligations under international law and to protect our representatives abroad, noting that “[f]ew government interests are more compelling.” Id. Judge Gasch held therefore that the statute withstood the scrutiny required by the equal protection clause and relied upon the authority of Frend in rejecting the first amendment challenges.
II.
The appellants in Frend v. United States had been convicted of violating section 22-1115 by demonstrating in front of the Austrian and German embassies. Finding that there was no question that their activities ran afoul of the statute, the Frend court proceeded to examine the statute’s constitutionality.
The court noted that section 22-1115 was enacted as an exercise of Congress’ constitutionally vested authority to “define and punish ... Offenses against the Law of Nations,” U.S. Const. art 1, § 8, cl. 10, its purpose being to fulfill the United States’ duty under international law “of protecting the residence of an ambassador or minister against invasion as well as against any other act tending to disturb the peace or dignity of the mission or of the member of a mission.” 100 F.2d at 692, 693. Limited as the statute was to “public demonstrations calculated to arouse passions and resentments in those governments with which we have official relations,” this court held that section 22-1115 was a legitimate and constitutional exercise of congressional authority. Id. at 693.
Although Frend is persuasive precedent, we cannot decide this case simply by citing it as the binding law of the circuit. The case was decided almost a half century ago and in the interval the Supreme Court has developed constitutional law in ways that must be taken into account. Appellants challenge section 22-1115 in part on the basis of a hybrid of equal protection and first amendment law that became part of the doctrinal landscape several decades after Frend. Indeed, much of modern first amendment law took shape after Frend was decided. We are compelled, therefore, to reexamine Frend in light of intervening precedent. Upon review, we find much of its analysis still convincing, and the basic holding fully consistent with the constitutional standards that have evolved.2
III.
Though it will be necessary in the course of this opinion to meet the multiple charges levelled by appellants and by the *1455dissent upon this minor regulation of demonstrations, the core of this case lies in the relationship between the United States’ national interests and international obligations and the first amendment’s guarantee of free speech. The question to be determined is whether section 22-1115 achieves a permissible accommodation between the competing claims of these profound constitutional values.
A.
Section 22-1115 was enacted pursuant to Congress’ power, under article I, section 8 of the Constitution, “To define and punish ... Offenses against the Law of Nations.” The need for such authority was, of course, one of the reasons a new constitution was desired, and the power was placed among the great powers grantéd the new government. Implementation of the law of nations by the American government was seen as crucial to the conduct of our foreign relations, a subject of pervasive concern in the Constitution. For that reason, the statute before us, though rooted in Congress’ power to define and punish offenses against the law of nations, also draws sustenance from all those provisions of articles I and II that empower the national government, as a whole, to manage American intercourse with other nations.
In vesting Congress with the power to define, as well as to punish, offenses against the Law of Nations, article I, section 8 of the Constitution authorized Congress to derive from the often broadly phrased principles of international law a more precise code, as it determined that to be necessary to bring the United States into compliance with rules governing the international community. In enacting section 22-1115, Congress sought to guarantee to foreign diplomats, long understood as “objects of especial respect and protection,”3 the security to which they have always been entitled under legal doctrines accepted and enforced throughout the world. Since the days of Blackstone, “infringement of the rights of ambassadors” have been regarded as one of “the principal offenses against the law of nations.” 4 W. Blackstone, Commentaries 68, and for as long as the United States has been a nation, those rights have been recognized to include those that are implicated here — protection from intimidation and the potential of violence, and from assaults on the dignity and peace of the embassy as well.
The principle that host states have a special responsibility to ensure that foreign embassies and the personnel inside them are free from threats of violence and intimidation is “solidly entrenched in the Law of Nations.” 2 C. Hyde, International Law 1249 (1945). Vattel, one of the first to attempt to codify the Law of Nations, wrote in the eighteenth century that embassies
being of such great importance in the universal society of nations, and so necessary to their common well-being, the persons of ministers charged with those embassies are to be held sacred and inviolable among all nations____ This safety is particularly due to the minister, from the sovereign to whom he is sent. To admit a minister, to acknowledge him in such character, is engaging to grant him the most particular protection, and that he shall enjoy all possible safety. It is true, indeed, that the sovereign is bound to protect every person within his dominions, whether native or foreign, and to shelter him from violence: but this attention is in a higher degree due to a foreign minister.
Vattel, The Law of Nations 464-65 (1863) (emphasis in original). Vattel went on to note that while an act of violence done to a “private person” was an “ordinary transgression,” which the sovereign of the country in which it occurred was free to pardon, a similar act against a foreign ambassador was “a crime of state, an offence against *1456the law of nations,” of which the power to pardon was vested in the sovereign “who has been offended in the person of his representative.” Id. at 465. The need for special measures to ensure protection is thus a function of both the unique sensitivity of the position and the strength of feeling that may often be aroused against nations which, while perhaps in some respects adversarial to ours, are ones with which we need to maintain diplomatic channels of communication.
The duty to safeguard the peace and dignity of the embassy has equally strong roots. Vattel explained:
The respect which is due to sovereigns should redound to their representatives, and especially their ambassadors, as representing their master’s person in the first degree. Whoever offends and insults a public minister commits a crime the more deserving of severe punishment, as he might thereby involve his country and his sovereign in very severe difficulties and trouble.
Vattel, supra, at 463. Thus, the tearing down in Philadelphia in 1802 of the flag of the Spanish minister, “with the most aggravating insults,” was considered actionable in the Pennsylvania courts as a violation of the law of nations. 4 J. Moore, Digest of International Law 627 (1906) (quoting letter from Secretary of State Madison to Governor McKean (May 11, 1802)). A complaint by the British government in 1794 concerning a “riot committed by a number of persons tumultuously assembled before the house of a foreign consul, requiring him to deliver up certain persons supposed to be resident with him, and insulting him with improper language,” was determined not to be subject to prosecution in the United States only because a consul was not considered a public minister. 1 Op. Att’y Gen. 41-42 (1794). Indeed, Attorney General William Bradford, in 1794, published an opinion in which he noted that the law of libel, when applied “in the case of a foreign public minister, ... is strengthened by the law of nations, which secures the minister a peculiar protection, not only from violence, but also from insult.” 1 Op. Att’y Gen. 52 (1794). Accord 1 Op. Att’y Gen. 73 (1794) (“it is usual [for foreign nations] to complain of insults to their ambassadors, and to require the parties to be brought to punishment”). The longstanding principle of diplomatic immunity reflects the same concern. One of the statutes enacted by the First Congress protected ambassadors from arrest and from suit. Any person who sought to prosecute or serve a writ upon an ambassador was subject to up to three years’ imprisonment, as were his attorney and any official who sought to execute the writ. Act of Apr. 30, 1790, ch. 9, §§ 25-26, 1 Stat. 112, 117-18.4
It was assumed by the framers and ratifiers of the Constitution that our obligations under international law would be honored. In the course of their rebellion, the American colonies were quick to assure the world that the “law of nations [would be] strictly observed.” 14 J. Cont.Cong. 635 (1779). The Continental Congress, lacking meaningful authority, had to content itself with passing a resolution urging the states to provide judicial remedies for infringements of the rights of ambassadors. 21 J.Cont.Cong. 1136-37 (1781). This resolution was apparently ineffective, for Edmund Randolph was later, at the constitutional convention, to identify as one of the defects of the Articles of Confederation that “they could not cause infractions of treaties or of the law of nations, to be punished,” and to note as an example that “[i]f the rights of an ambassador are invaded by any citizen it is only in a few states that any laws exist to punish the offender.” 1 M. Farrand, The Records of the Federal *1457Convention of 1787, at 19, 25 (1911). In arguing for ratification, John Jay subsequently characterized it as “of high importance to the peace of America that she observe the law of nations.” The Federalist No. 3, at 13 (P. Ford ed. 1898). Accord Dickinson, The Law of Nations as Part of the National Law of the United States, 101 U.Pa.L.Rev. 26, 55-56 (1952) (“the Constitution was framed in firm reliance upon the premise, frequently articulated, that ... the Law of Nations in all its aspects familiar to men of learning in the eighteenth century was accepted by the framers, expressly or implicitly, as a constituent part of the national law of the United States”).
As we have demonstrated, the framers understood that the protection of foreign embassies from insult was one of the central obligations of the law of nations. See supra, pp. 1455-56. Indeed, the Act of April 30, 1790, which provided for the imprisonment of anyone who sought to bring legal action against an ambassador, see supra p. 1456, was enacted by a Congress that consisted of many of the framers of the Constitution, along with their contemporaries. That Act flatly denied access to the courts, which is a form of petitioning the government, and yet was assumed to be constitutional. As the Supreme Court has shown, it is often instructive to examine the practices at the time of the Constitution’s framing as a guide to understanding the meaning of its provisions. See Marsh v. Chambers, 463 U.S. 783, 103 S.Ct. 3330, 77 L.Ed.2d 1019 (1983).
These were among the considerations that motivated the Congress that enacted section 22-1115. These principles were repeatedly invoked during the debate on the Senate floor. Senator Pittman, the sponsor of this provision, commented:
I believe that since the beginning of government the inviolability of ambassadors and ministers has been universally recognized in all civilized countries. Even in times of vicious wars special ambassadors from one of the hostile countries to the other have gone without guards, realizing that the honor of the country to which they were going was sufficient to protect their lives and to protect them in the performance of their duties. If this were not so, intercourse between governments would be practically impossible.
81 Cong.Rec. 8587 (1937). The issue of the law’s constitutionality was the subject of some discussion, and Senator Pittman argued strenuously that there was no constitutional right to do that which was regulated by the statute:
—to make an offensive demonstration in front of an embassy or in front of a legation, the residence of a diplomat, who is our guest here, who depends on us wholly for his protection not only against murder, not only against insult, but against any character of annoyance or interference that will bring the hatred of the people of his country against our people.
Id. at 8589.
The requirements imposed by international law have changed somewhat since the days of Vattel, since the founding of the Republic, and even since the era in which section 22-1115 was enacted. The legal principles embodied in section 22-1115, however, have gained rather than lost force in the intervening years. Article 22 of the 1961 Vienna Convention on Diplomatic Relations, to which the United States is a signatory, sets out duties expected of a host state in regard to the mission premises of foreign nations. It states:
1. The premises of the mission shall be inviolable. The agents of the receiving State may not enter them, except with the consent of the head of the mission.
2. The receiving State is under a special duty to take all appropriate steps to protect the premises of the mission against any intrusion or damage and to prevent any disturbance of the peace of the mission or impairment of its dignity. .
*14583. The premises of the mission, their furnishings and other property thereon and the means of transport of the mission shall be immune from search, requisition, attachment or execution.
Basic Documents in International Law 219 (Ian Brownlie ed. 1983) (emphasis added). The principles embodied in the Vienna Convention were for the most part already established under customary international law. According to Leonard Meeker, who as Legal Adviser to the State Department testified in favor of Senate ratification, “[t]he 1961 Vienna Conference examined the articles in the light of modern conditions, surveying the body of law and practice which had developed over the years regarding the rights, duties, and privileges of diplomatic missions” and “recognized the great need for an agreed international standard of treatment.” Hearing on the Vienna Convention on Diplomatic Relations Before the Subcomm. of the Senate Comm, on Foreign Relations, 89th Cong., 1st Sess. 2 (1965).
Article 22 of the Vienna Convention was derived from draft article 20, which was adopted in 1958 by the International Law Commission. In its commentary on this provision, the Commission stated that the receiving state bore a “special duty,” and that it “must, in order to fulfill this obligation, take special measures — over and above those it takes to discharge its general duty of ensuring order.” II Yearbook of the International Law Commission 1958 at 78, 95. The Department of State has cited section 22-1115 as the concrete implementation by the United States of its legal obligations under paragraph two of article 22 of the Vienna Convention. Hearing on the Vienna Convention on Diplomatic Relations Before the Subcomm. of the Senate Comm, on Foreign Relations, supra, at 49.5
We think it clear beyond quibble that since the founding of our nation adherence to the law of nations, and most particularly that branch of the law that demands security for the persons and respect for the dignity and peace of foreign emissaries, has been regarded as a fundamental and compelling national interest. It is also clear that the founders, who explicitly gave Congress the power to enforce adherence to the standards of the law of nations, which they understood well, saw no incompatibility between this national interest and any guaranteed individual freedom.
B.
It must not be forgotten that a determination by the political branches concerning the obligations of the United States is also a determination about the conduct of American foreign policy. Defining and enforcing the United States’ obligations under international law require the making of extremely sensitive policy decisions, decisions which will inevitably color our relationships with other nations. Such decisions “are delicate, complex, and involve large elements of prophecy. They are and should be undertaken only by those directly *1459responsible to the people whose welfare they advance or imperil. They are decisions of a kind for which the Judiciary has neither aptitude, facilities nor responsibility ____” Chicago & Southern Air Lines, Inc. v. Waterman Steamship Corp., 333 U.S. 103, 111, 68 S.Ct. 431, 436, 92 L.Ed. 568 (1948).
A number of judicial doctrines embody the “classical deference [owed by courts] to the political branches in matters of foreign policy.” Regan v. Wald, 468 U.S. 222, 242, 104 S.Ct. 3026, 3039, 82 L.Ed.2d 171 (1984). For example, the Act of State doctrine, see supra note 4, “concerns the competency of dissimilar institutions to make and implement particular kinds of decisions in the area of international relations,” and derives from the “strong sense” that an absence of judicial restraint in that area “may hinder rather than further this country’s pursuit of goals both for itself and for the community of nations as a whole in the international sphere.” Banco Nacional de Cuba v. Sabbatino, 376 U.S. 398, 423, 84 S.Ct. 923, 937, 11 L.Ed.2d 804 (1964). The political question doctrine requires that courts abstain from cases where there “is found a textually demonstrable constitutional commitment of the issue to a coordinate political department,” Baker v. Carr, 369 U.S. 186, 217, 82 S.Ct. 691, 710, 7 L.Ed.2d 663 (1962), foreign affairs exemplifying perhaps the most prominent such commitment. See Goldwater v. Carter, 444 U.S. 996, 1002-06, 100 S.Ct. 533, 536-39, 62 L.Ed.2d 428 (1979) (Rehnquist, J., joined by Burger, C.J., and Stewart and Stevens, JJ., concurring in the judgment). Similarly, the Court has repeatedly characterized immigration policy, “interwoven with ... the conduct of foreign relations,” Harisiades v. Shaughnessy, 342 U.S. 580, 588-89, 72 S.Ct 512, 518-19, 96 L.Ed. 586 (1952), as “largely immune from judicial control.” Fiallo v. Bell, 430 U.S. 787, 792, 97 S.Ct. 1473, 1477, 52 L.Ed.2d 50 (1977) (quoting Shaughnessy v. Mezei, 345 U.S. 206, 210, 73 S.Ct. 625, 628, 97 L.Ed. 956 (1953)). These lines of doctrine are unified by the recognition that there are certain classes of decisions which courts are institutionally less suited to make.6
Deference to the judgment of Congress and the President in these matters is, of course, by no means absolute. But this is not a case in which we are asked to believe any implausible thing. It is obvious that ill treatment of ambassadors to the United States will adversely affect the interests of the United States. It is also obvious that the protection accorded those ambassadors by section 22-1115 is a limited one and regulates speech to a very minimal extent. Strictly speaking, it may be doubted whether there is any need for any particular deference to the judgment of the political branches in order to uphold this statute. But if there is such a need, it is amply met.
We have here an unusually strong case for judicial deference, over and above the traditional and general requirement of restraint in the area of foreign relations, for we are asked to,review a statute which both Congress and successive Presidents have declared to be necessary to fulfill our obligations under both customary international law and a treaty which we have signed. It has long been understood that the interpretation given by the executive branch of the country’s responsibilities under the treaties to which it is a signatory are entitled to “great weight.” See Sumitomo Shoji America, Inc. v. Avagliano, 457 U.S. 176, 184-85, 102 S.Ct. 2374, 2379-80, 72 L.Ed.2d 765 (1982); Kolovrat v. Oregon, 366 U.S. 187, 194, 81 S.Ct. 922, 926, 6 L.Ed.2d 218 (1961). This necessarily shapes the nature of the scrutiny to which we subject the justifications offered for section 22-1115, for in this context a court cannot lightly dispute a determination by the political branches that the statute meets important international obligations, that the interests at stake are compelling, *1460or that those interests cannot be met by a statute with a more narrow reach. When a provision is enacted in order to bring the United States into compliance with international law, and when those obligations are reaffirmed by treaty, a court must give careful consideration before it sets aside that which the legislative and executive branches have deemed necessary to fulfill the nation’s international responsibilities. It would be quite improper for the judiciary to disregard international obligations that are inseparable from our nationhood.
C.
We accept, as highly pertinent to the compelling interests served by section 22-1115, the uncontradicted assertions made in the government affidavits, which describe the sensitive foreign policy concerns the statute implicates. Contrary to the suggestion made by the dissent, we do not uphold the statute “simply because the government has sent its lawyers into court to defend it.” Dissent at 1489. The presence of a first amendment claim requires that the court examine the balance struck by the political branches. The deference we owe is not to the government’s legal judgment that the statute is constitutional, but to their factual discussion of the nature and depth of the foreign relations interests that are involved. (As we have said, with or without such deference, it is obvious that these interests are genuinely present.) Once we accept that these interests exist, it becomes the responsibility of the court to determine whether they justify the statute before us.
The four uncontradicted declarations submitted by defendants below indicate some of the special concerns justifying the unique measures imposed by section 22-1115.7 The two State Department officials cite the Vienna Convention as the source of the international obligation honored by the statute. Declaration of James E. Nolan, Jr., R.E. at 46; Declaration of David Fields, R.E. at 36-37. The Vienna Convention, as we have explained, codified both the responsibility to provide security to foreign embassies and the responsibility to protect them from affront. The affidavits do not explain, nor need they, that it constitutes an affront to display a sign that characterizes members of a government as, for example, “killers.” Expert judgment is hardly necessary on such a point. What the affidavits provide is a detailed description of the special difficulties associated with ensuring the security of foreign embassies, and the consequences of failing to do so.
Both David Fields — the State Department official responsible for coordinating security arrangements for diplomatic personnel in the District — and James Nolan— Director of the Office of Foreign Missions — attested to the existence of a direct relationship between the perception held by other governments of the strength of security provided their diplomats here and the extent of protection they choose to provide ours. In Nolan’s words, “[t]o compromise on the security provided to foreign missions here is to compromise on the security of our personnel in our missions overseas. What happens in terms of security provided to foreign diplomatic personnel and premises here has a direct impact on the protection afforded U.S. missions and personnel abroad.” Declaration of James E. Nolan, Jr. at 2, R.E. at 47. Accord Declaration of David Fields at 2, R.E. at 37. *1461These concerns were very much in the mind of Congress when it enacted section 22-1115. Senator Pittman explained that “the motive that actuates us today is to have the foreigners upon whom we must depend for the protection, of our citizens friendly to us.” 81 Cong.Rec. 8485 (1937). This was echoed by Cordell Hull, then Secretary of State, who urged passage of the statute in a letter to Senator Pittman: “Unless we extend such reasonable protection to representatives of other governments, we cannot hope to receive protection for our representatives abroad.” Id. at 8486. Foreign governments may not all be expected to preserve the same equanimity in the face of hostile demonstrations that we require of domestic government. Moreover, foreign governments, not being subject to United States law, particularly constitutional law, as American officials are, have ways of retaliating against American interests and Americans, whether official representatives or private citizens, abroad.
As the declarations of the Secret Service agent who heads the Office of Protective Operations, Thomas Quinn, and the Commanding Officer of the Special Operations Division of the Metropolitan Police Department, Deputy Chief of Police John Connor, reveal, there are unique obstacles to providing adequate security to foreign embassies — the most significant of which is the inability of police personnel to establish a presence inside the buildings. The Quinn declaration is worth quoting at length:
2. In many respects the obstacles confronting the Secret Service in providing security for foreign embassies, legations and consulates are much greater than those encountered in protecting personnel and property of the United States. At the White House and at the residence of the Vice President, for example, the Secret Service maintains a presence inside the structures which enables it to deploy a defensive network consisting of a number of manned perimeter posts radiating out from a centralized command center. The Secret Service’s permanent on-site presence has also facilitated the installation of sophisticated surveillance equipment which enables Secret Service personnel to continuously monitor the area between the building and the fence which surrounds the site. Although the task of insuring the safety of the White House complex and the residence of the Vice President is extremely difficult, it would be impossible were the Secret Service subject to the same legal constraints that control Secret Service operations at foreign embassies, consulates, and legations.
3. The structures which house the diplomatic operations of foreign nations provide a tangible focal point to those wishing to demonstrate against the policies of the foreign government. Recent events underscore the fact that demonstrations near embassies or other official foreign government buildings, even if initially peaceful, exacerbate tensions and often lead to violent confrontations between the police and demonstrators. However, in contrast to the White House and other official buildings of the United States, Secret Service personnel are prohibited by international law and comity from entering onto the premises of a foreign embassy, legation, or consulate except with the expressed prior approval of the foreign government. Consequently, at such locations, the Secret Service has no centrally located defensive command center, has a minimal amount of intrusion detection equipment at its disposal, and, perhaps most important, has no secondary or fall-back defensive position which would otherwise be available if the Secret Service were permitted to position personnel inside the protected premises.
Declaration of Thomas D. Quinn at 2-3, R.E. at 42-43. The 500-foot buffer therefore provides “a necessary zone for police response in those instances when the perimeter is breached.” Declaration of John C. Connor at 2, R.E. at 49.8
*1462D.
It has long been understood that the right to demonstrate may be made to depend in part on the site of the protest. The Supreme Court has upheld the constitutionality of laws regulating protests in front of a courthouse on the basis of the State’s “legitimate interest in protecting its judicial system from the pressures which picketing near a courthouse might create.” Cox v. Louisiana, 379 U.S. 559, 562, 85 S.Ct. 476, 479, 13 L.Ed.2d 487 (1965). It has upheld the application of a general trespass statute to demonstrations at jails, jails having been “built for security purposes.” Adderley v. Florida, 385 U.S. 39, 41, 87 S.Ct. 242, 244, 17 L.Ed.2d 149 (1966). It has upheld the exclusion of political candidates from military bases, the function of military bases being “to train soldiers” rather than host political events. Greer v. Spock, 424 U.S. 828, 838, 96 S.Ct. 1211, 1217, 47 L.Ed.2d 505 (1976). And it has upheld the regulation of expressive activity near a school when such activity might disturb the educational activities inside. Grayned v. City of Rockford, 408 U.S. 104, 92 S.Ct. 2294, 33 L.Ed.2d 222 (1972). Each of these cases makes clear that the nature and extent of first amendment rights may vary with the location at which their exercise is sought.
Appellants offer extensive analogies to prior cases involving protests in front of the White House, the Capitol, and the Supreme Court, but the regulations in those cases simply did not implicate the same set of interests addressed by section 22-1115. First, shielding government officials from public protest is incompatible with our democratic structure, which relies on public criticism as a means of promoting responsive government. Foreign ambassadors, in contrast, have no similar obligation to be accessible to public attack, and our polity does not have the same interest in ensuring that they are. Second, we cannot ignore the fact that American diplomats living overseas are always to some degree at risk. The perception abroad that our government is diminishing the protection accorded the embassies to whom we are host would, we are told, seriously compound that risk. Finally, and most fundamentally, we face here a question of living up to our obligations under international law and a treaty. These considerations distinguish the issues presented here from those involving protests in front of the White House, the Capitol, and the Supreme Court.
Section 22-1115, then, is a statute supported by a compelling governmental interest and one which imposes only a very minor geographic limitation on speech. It is impossible for us to see how the compelling interest at stake could be served with a regulation that had any significantly smaller impact on speech.
The statute that Congress has crafted proscribes an opposition demonstration only within a narrowly defined locus. Plaintiffs are free under section 22-1115 to hold an anti-Soviet demonstration anywhere in the city but within 500 feet of the Soviet Embassy. Appellants presumably feel that the embassy location would generate heightened visibility and best help them succeed in getting their message across. But the first amendment does not guarantee an optimal setting for speech; there is no right to the backdrop most interesting to press photographers or television cameramen. See Heffron v. International Society for Krishna Consciousness, Inc., 452 U.S. 640, 647, 101 S.Ct. 2559, 2563, 69 *1463L.Ed.2d 298 (1981); Adderley v. Florida, 385 U.S. at 47-48, 87 S.Ct. at 247-48; White House Vigil for the ERA Committee v. Clark, 746 F.2d 1518 at 1520, 1538 (D.C.Cir.1984). Inevitably, many of the most desirable places to demonstrate will be buildings and areas that for other reasons require special protective measures. We think Congress has met an unusually difficult problem with a balanced attempt to restrict no more speech than necessary.9
The obligations of the United States under international law, reaffirmed by treaty, do not, of course, supersede the first amendment. Neither, however, has it ever been suggested that the first amendment is incompatible with the United States’ most basic obligations under the law of nations. The two must be accommodated and section 22-1115 accomplishes an accommodation well within the range of the permissible. That may be seen by imagining a shift of the balance in either direction. Were we to hold that the first amendment requires Congress to allow protests and demonstrations up to the gate of an embassy, there would be very little left of the United States’ international obligation to preserve the peace, dignity, and security of foreign representatives in our nation’s capital. Peace and dignity would be destroyed outright, while, as a practical matter, the task of repulsing invasions of the embassy and its grounds would be left largely to the foreign nation’s security forces. Violence between American citizens and foreign security forces in Washington, D.C., is hardly calculated to improve relations between governments or to be thought by the international community to be an adequate discharge of America’s international obligations. If, on the other hand, Congress tried to protect foreign representatives from all affronts, it would have to rule off limits all utterances anywhere tending to bring foreign governments into disrepute. That, of course, is unthinkable. The first amendment would have been destroyed over wide areas in the name of international law. What has been done through section 22-1115 is to give first amendment freedoms the widest scope possible consistent with the law of nations. Appellants, and all other Americans, may freely express their sentiments about the actions of the Soviet Union and Nicaragua on radio and television, in print, by speech or placard, and they may do so anywhere in the United States, but they may not carry the described placard or congregate within 500 feet of the embassy of the nation concerned. To regard that trifling limitation, enacted under a power explicitly given by the Constitution, as a threat to freedom of speech seems to us a considerable exaggeration.
E.
The dissenting opinion offers a number of objections to our analysis. At this point *1464we undertake to respond to the related arguments that the statute serves no compelling governmental interest, that it is both overinclusive and underinclusive, and that it is unconstitutional because there is a less restrictive alternative available. We think that these arguments are not only defective but that, in an important respect, the first and the third contradict one another.
The dissent regards the interest in maintaining our nation’s adherence to longstanding principles of international law as not compelling. In the dissent’s view, that interest is so far from compelling that, aside from providing an initial source of authority for the congressional enactment, the law of nations does not bear at all on the question of that enactment’s constitutionality. This line of attack requires the dissent to trivialize the compelling national interests that are reflected in international law. When these interests are given their appropriate weight, however, the dissent’s constitutional argument — which is premised on its utter rejection of those interests — is revealed as beside the point.
The dissent’s analysis appears to rest on the assumption that this court must either hold that international law “supersede^]” constitutional requirements (as we are charged with doing, dissent at 1482), or conclude that international law is irrelevant and conduct the analysis as if no principle of international law were present (as the dissent does). Both propositions would be incorrect.
If international law were, as the dissent views it, just another code of rules, like the common law of negligence or statutory law governing commercial transactions, it would of course offer little that need be weighed against a constitutional provision. As a matter of formal description, leaving aside the real interests in play, it is true that in the American legal hierarchy, the Constitution trumps all other law. But it is also true, as the dissent systematically overlooks, that other law sometimes expresses values and concerns that are of legitimate constitutional dimension. In such cases, the assertion that the Constitution cannot be overridden by ordinary law is true but analytically empty. As we have tried to make clear, international law in the aspect dealt with here is important not in the merely formal sense just described but because it embodies American interests that are themselves given weight in the Constitution and that must, for that reason, find accommodation with the first amendment. Those interests have to do with the place of the United States among nations, with the respect it is accorded, with the raising or lowering of tensions between our country and others, with the conduct of our foreign policy, primarily by the President but also in some measure by Congress in ways specified by the Constitution, and, in extreme cases, with war and peace. When, in the considered judgment of the branches charged by the Constitution with the responsibility for these matters, a minor regulation of picketing is necessary to preserve the peace and dignity of foreign emissaries, it is preposterous to say that no interest is present that courts need to respect and weigh.
While the dissent appears to concede that “the nature of an embassy and our responsibilities as international hosts do weigh in the balance as to what is permissible regulation of free speech in that particular place,” dissent at 1483, it chooses to ignore completely the definitions given those responsibilities by Congress, the President, and codified and customary international law in favor of its own. One reads the dissent’s analysis of the dignity interest in vain for a hint that any such responsibilities are involved here. Dissent at 1485-87. The dissent rejects this interest on the basis of a generalization — people ought not be shielded from speech they find distasteful — that has never been applied in this context, as if the context were irrelevant. Any “weighing” the dissent has done is invisible. We think the founders would have been quite surprised to learn that the document in which they constituted the government precludes the enactment of a statute to honor one of the core *1465principles of the law of nations because that interest is not “compelling.”
The dissent also employs an all-or-nothing theory of compelling governmental interests to argue, so far as one can tell, that the United States must either abandon any attempt to protect the peace and dignity of foreign embassies or impose nationwide censorship over all modes of expression that might conceivably insult any foreign government. Dissent at 1481-82. The dissent notes that the government has never sought to ban all conceivable affronts to foreign governments, and concludes from this that America’s international obligation is “flexible,” id. at 1485, thus not compelling, and hence, in effect, constitutionally non-existent. Going to the other extreme, the dissent wonders how, if section 22-1115 is supported by a compelling governmental interest, the ban can be so limited. The dissent implies that our analysis would support a nationwide suppression of any criticism of foreign governments, which the dissent finds “worrisome.” Id. at 1487. The Vienna Convention specifically requires protection of embassy premises, not of foreign sensibilities about what is printed in American newspapers. But that fact aside, the dissent’s is a startling mode of constitutional analysis: faced with a spectrum between competing constitutional values, a court must override one value completely and take the other to its extreme. A court faced with the competing constitutional demands of fair trials and press freedom could resolve the issue, apparently, only by prohibiting any press reports of any criminal proceedings or by throwing the entire process open, even to the extent of allowing television cameras into the deliberations of the grand and petit juries. Either result would be absurd. We can uphold, for example, a decibel limit applied to soundtracks without fear that the same rationale — preserving the public peace— would equally well support the silencing of all speech everywhere. The everyday business of judging is the exercise of judgment, of balance, of accommodation, not the announcement that no value may be admitted into the calculus which, if carried to its extreme and applied without regard to competing values, would produce an unacceptable result.
The dissent challenges also our holding that the statute is sufficiently tailored, and concludes that the regulation is both over-inclusive and underinclusive. However, its discussion measures the statute only against the interest in security, having eliminated the interest in peace and dignity from the analysis. Since we have shown that this second interest is valid as well, we need express no judgment on whether the security interest, standing alone, would be sufficient to justify the constitutionality of section 22-1115.
The dissent argues in addition, however, that even if the statute were adequately tailored it would be unconstitutional because there exists a less restrictive alternative: a statute barring all demonstrations within five hundred feet of an embassy. It seems somewhat odd to describe an alternative that restricts more speech as “less restrictive.” While there certainly is more involved in the examination of alternatives than simply “comparing the number of syllables that are uttered” under each, dissent at 1493, an alternative statute that restricts every exercise of expression regulated by the statute before us and other, presently unregulated, speech activities as well, is not (whatever other virtues it may possess) a less restrictive alternative.10
*1466The dissent takes an unwarranted step when it concludes that section 22-1115 is unconstitutional because a broader time, place, or manner regulation would be constitutionally acceptable and would accomplish the same ends. While Congress is free to enact such a statute, it need not do so.11 Under the dissent’s theory, the law upheld in Cox v. Louisiana, which prohibited picketing near a courthouse “with the intent of influencing any judge, juror, witness, or court officer,” ought to have been struck down because the local government was free to ban all picketing near a courthouse. The law in Young v. American Mini Theatres, 427 U.S. 50, 96 S.Ct. 2440, 49 L.Ed.2d 310, which forbade adult theatres from locating within 1,000 feet of other adult theatres, ought to have been invalidated because such a restriction could lawfully have been applied, and therefore could only lawfully have been applied, to all theatres. The dissent’s position requires as well that we regard the unpublished order issued by a panel of this court (Judges Wright, Leventhal and Robb) in Jackalone v. Andrus, No. 79-2359 (D.C. Cir. Nov. 19, 1979), as wrong. In Jackalone, we “accept[ed] the representation of the State Department that a demonstration at Lafayette Park has an unacceptable potential for danger to the hostages now being held in the American Embassy in Tehran,” and upheld its prohibition. Id. While that order, being unpublished, is not precedent, we think it instructive to note that the dissent’s analysis would have required that the prohibition on demonstrations relating to the Iranian situation that was upheld in the order be voided, with the government allowed to choose only between permitting the demonstration or banning all demonstrations in that area.12
The dissent’s analysis thus reads a grave threat to liberty in every statutory distinction related to the purpose of the statute, and inexorably leads to a requirement of a total ban within the proscribed area. This would present a new element in first amendment jurisprudence — a “most restrictive alternative” doctrine. The cure suggested is far broader than the problem. One supposes that Father Finzer, if he won his case on such a ground, might reasonably consider his victory Pyrrhic. Nothing is solved by such a “solution.”
The dissent’s assertion that it would be constitutional to prohibit all demonstrations near embassies — an assertion necessary to its claim that the present statute is unconstitutional because there exists a “less restrictive” alternative — undercuts another key premise of its argument because it cannot be squared with the dissent’s rejection of any valid interest in protecting the peace and dignity of embassies. As the dissent agrees, a law prohibiting a lone protester carrying a sign of any sort bears no relation to safeguarding the phys*1467ical security of the building and its occupants. Dissent at 1488. The only conceivable interest that would support such a restriction of speech is that of dignity and peace. The dissent admits as much when it states that its proposed total ban “would provide greater protection from the dangers to both dignity and security than the current regulation does.” Dissent at 1495. The dissent’s endorsement of the constitutionality of such a statute is a recognition, therefore, that political speech near an embassy poses a special problem that is of constitutional magnitude, and that problem is the one the dissent elsewhere denigrates, the need to maintain the peace and dignity of foreign emissaries. The dissent thus necessarily concedes implicitly what it denies explicitly.
The dissent compounds its analytic difficulties by suggesting (without explanation) that this interest, while not “compelling,” might be “significant” and that it therefore would justify a statute that is content-neutral but not one that is content-based. Dissent at 1496 n. 28. The dissent never reveals the process by which it calibrates these standards, so there is no way of knowing why the interest in honoring international obligations, and the foreign policy concerns implicated by those obligations, rise so far and no further. Certainly there is nothing in the dissent’s analysis of the dignity interest that provides the answer. That discussion, as we have noted, approaches this interest by completely abstracting it from the international context in which it arises, and rejects our holding that it is compelling simply by noting that individuals may not be “shield[ed] ... from hearing things they find offensive,” when that offensiveness is based “on the fact that the audience disagrees.” Id. at 1485-86.
There are at least two answers to this truism. The first is that the proposition was designed for members of the American political community. They may not be shielded from speech with which they disagree because the competition of ideas is central to oúr democratic process. That rationale has nothing to do with giving offense to a foreign ambassador. The dissent never addresses this point. It merely notes that public criticism of foreign governments may affect the domestic political debate. While the assertion is true, it does nothing to salvage the dissent’s challenge to the interest in preserving the peace and dignity of the embassy, since that challenge is grounded in the principle that there is no legitimate interest in shielding listeners from speech they find offensive. The identity of the listener is relevant to the question of when this principle applies.
The second answer is that, were it applicable here, the proposition advanced would make it impossible to sustain the dissent’s position. The interest in shielding people from political speech with which they disagree is neither compelling nor important nor legitimate, and cannot justify a statute enacted for that end even if, in order to make it more constitutionally palatable, the legislature bans favorable speech at the same time. If the serious and substantial foreign policy concerns we have described are not present, then a content-neutral statute passed in order to forestall critical speech (by banning all speech) would be unconstitutional. If, as we believe, and as the governmental branches entrusted with judgment on these matters have asserted, these concerns are in fact deeply implicated, they are quite clearly compelling.
IV.
We turn now to the challenge presented by appellants, which is in some respects quite different from that made by the dissent. For obvious reasons, the appellants do not suggest that prohibiting their demonstration would be permissible as long as others are prohibited as well. While they urge upon us several distinct grounds for reversing the decision below, they too emphasize the issues of content and viewpoint discrimination. As we have explained, the first provision of the statute they seek to invalidate applies only to demonstrations in which signs are displayed that are designed *1468to bring a foreign government into “public odium” or “public disrepute.” Their legal challenge relies heavily on this element of the statute as the root of its constitutional infirmity, raising claims grounded in the first amendment guarantees of free speech and assembly and the fourteenth amendment guarantee of equal protection.
Content-based restrictions have been held to raise both first and fourteenth amendment claims because in the course of regulating speech, they differentiate between types of speech. Compare Widmar v. Vincent, 454 U.S. 263, 102 S.Ct. 269, 70 L.Ed.2d 440 (1981) (exclusion of religious speech from public forum violates first amendment right of free speech) with Police Department of the City of Chicago v. Mosley, 408 U.S. 92, 92 S.Ct. 2286, 33 L.Ed.2d 212 (1972) (exemption of labor picketing from ban on picketing near schools violates fourteenth amendment right of equal protection). Under either theory, such a statute is valid only if “necessary to serve a compelling state interest and ... narrowly drawn to achieve that end.” Perry Education Association v. Perry Local Educators’ Association, 460 U.S. 37, 45, 103 S.Ct. 948, 954, 74 L.Ed.2d 794 (1983); accord Carey v. Brown, 447 U.S. 455, 461-62, 100 S.Ct. 2286, 2290-91, 65 L.Ed.2d 263 (1980).
Appellants do not concede that this is the relevant test. Instead, they point to language in Mosley, 408 U.S. 92, 92 S.Ct. 2286, 33 L.Ed.2d 212 (1972), and Regan v. Time, 468 U.S. 641, 104 S.Ct. 3262, 82 L.Ed.2d 487 (1984), which might seem to suggest a total ban on content-based restrictions of any sort. Were appellants correct, first amendment law would have been revolutionized. The Court, it would have to be supposed, has overruled subsilentio New York Times Co. v. Sullivan, 376 U.S. 254, 84 S.Ct. 710, 11 L.Ed.2d 686 (1964) (heightened protection accorded writings about “public figures”), Ginsberg v. New York, 390 U.S. 629, 88 S.Ct. 1274, 20 L,Ed.2d 195 (1968) (upholding obscenity regulation), and Chaplinsky v. New Hamsphire, 315 U.S. 568, 62 S.Ct. 766, 86 L.Ed. 1031 (1942) (upholding prohibition of use of “fighting words”), as well as a host of other decisions too numerous to mention here. No such upheaval has taken place. In Mosley, the Court invalidated a city ordinance that prohibited all picketing within one hundred and fifty feet of a school, except peaceful labor picketing of any school involved in a labor dispute. Although the opinion in Mosley contains dicta suggesting that content-based restrictions are “never permitted,” 408 U.S. at 99, 92 S.Ct. at 2292, the Court in that case in fact conducted the traditional analysis and determined that the statute in question was not sufficiently tailored to its objectives. Id. at 100-101, 92 S.Ct. at 2292-93. Were content-based restrictions automatically unconstitutional, that discussion would have been unnecessary. In Regan v. Time, the Court found unconstitutional a statutory scheme which made it a crime to photograph securities or obligations of the United States unless “for philatelic, numismatic, educational, historical, or newsworthy purposes,” 18. U.S.C. § 504 (1982), finding that a determination of newsworthiness or educational value was necessarily content-based. The government defendants, however, had declined to defend the constitutionality of the content-based regulation as written, arguing that the provision in question was not in fact mandatory. 468 U.S. at 649 n. 5, 104 S.Ct. at 3267. Although the majority opinion includes the assertion that “[regulations which permit the Government to discriminate on the basis of the content of the message cannot be tolerated under the First Amendment,” id. at 648-49, 104 S.Ct. at 3267 the absence of the traditional balancing analysis can likely be attributed to the refusal of the government to put forward any governmental interest served by the provision as written for the Court to balance. We note that in a case decided after Regan, this court declined to adopt the extreme view urged by appellants here and reaffirmed the continuing validity of the “narrowly tailored to compelling state interest” test. White House Vigil for the ERA Commit*1469tee v. Clark, 746 F.2d 1518, 1526 n. 66 (D.C.Cir.1984).
Appellants argue alternatively that even if content-based restrictions are generally subject to a balancing test, section 22-1115 is not. They point out that this statute represents not only content discrimination, but viewpoint discrimination as well. While a prohibition of, for example, all political speech near an embassy would be a content-based restriction arguably subject to the standard described above, a prohibition of speech that brings a foreign government into disrepute is a viewpoint-based restriction that appellants contend is per se unconstitutional. They maintain that the fact that the statute is viewpoint-discriminatory, “standing alone,” renders it invalid, Reply Brief for Plaintiffs-Appellants at 1-2. This is presumably why they characterized the declarations submitted below by defendants as “not relevant nor material to any issue involved in this case.” Brief for Plaintiffs-Appellants at 58.
We do not think the law is more severe with respect to viewpoint-based restrictions than it is to content-based restrictions. Although some academic commentators have urged that there be different tests for those content-based restrictions that are viewpoint-neutral and those that are not,13 the Supreme Court has maintained a uniform standard. See Carey v. Brown, 447 U.S. at 462 n. 6, 100 S.Ct. at 2291 n. 6. Indeed, the suggestion that a statute which is not viewpoint-neutral is automatically invalid was put to rest in Parker v. Levy, 417 U.S. 733, 94 S.Ct. 2547, 41 L.Ed.2d 439 (1974), which upheld the constitutionality of laws prohibiting members of the armed forces from making speeches which “bring discredit upon the armed forces,” 10 U.S.C. § 934 (1982).14
Statutes that regulate speech in ways that affect different viewpoints differently may well be less likely to be upheld than statutes which affect all viewpoints equally, but that is simply because there are fewer situations that justify differentiation according to the speaker’s viewpoint. The standard for justification remains the same.15
*1470V
We stated in Part III our holding that the interests which section 22-1115 was enacted to serve are indisputably compelling. Appellants have not seriously contested that point, although neither have they conceded it. Their argument is rather that regardless of the importance of the statute’s ends, the means it establishes are unconstitutionally vague, standardless, facially overbroad, and discriminatory. We now take up each set of claims in turn.
A.
The issue of vagueness requires no lengthy discussion. Whatever ambiguity may exist at the fringes, section 22-1115 applies clearly and directly to the activities in which the parties who brought this action wish to engage. The complaint they filed made precisely that admission: “[Pjlaintiffs wish peacefully to carry banners, placards, signs and devices which depict messages critical of foreign governments, and their acts and policies. They wish to do so on the public streets and sidewalks in the District of Columbia, within 500 feet of the official buildings of the foreign governments whose acts and policies they intend to criticize.” Complaint at 3-4, R.E. at 6-7. There is no ambiguity, therefore, in the statute’s application to the conduct primarily at issue. See Young v. American Mini Theatres, 427 U.S. 50, 58-59, 96 S.Ct. 2440, 2446-47, 49 L.Ed.2d 310 (1976) (holding it “unnecessary” to consider vagueness challenge to an ordinance “unquestionably applicable” to the parties before the Court).
Nor in any event is section 22-1115 unconstitutionally vague. With this statute, as with virtually all statutes, it is undoubtedly the case that a skilled legal “imagination can conjure up hypothetical cases in which the meaning of these terms will be in nice question.” American Communications Association v. Douds, 339 U.S. 382, 412, 70 S.Ct. 674, 690, 94 L.Ed. 925 (1950). Nevertheless, its language is straightforward. As this court has previously observed, “[sjection 22-1115 meticulously specifies the consequences against which it erects protection for foreign governments.” Zaimi v. United States, 476 F.2d 511, 526 (D.C.Cir.1973). Both demonstrators and law enforcement officers are given a clear description of the activity the statute proscribes, and there is no reason to believe that a substantial amount of conduct outside its scope is being deterred. Section 22-1115 defines the offense “with sufficient definiteness that ordinary people can understand what conduct is prohibited and in a manner that does not encourage arbitrary and discriminatory enforcement,” Kolender v. Lawson, 461 U.S. 352, 357, 103 S.Ct. 1855, 1858, 75 L.Ed.2d 903 (1983), and that is all that is required.
B.
Appellants challenge that portion of section 22-1115 which forbids congregating within five hundred feet of the official buildings after police authorities have ordered dispersal on the ground that the provision does not contains standards defining when such orders can be given. They cite only one case in support of this argument — Shuttlesworth v. Birmingham, 394 U.S. 147, 89 S.Ct. 935, 22 L.Ed.2d 162 (1969). They assert that Shuttlesworth is “dispositive,” because section 22-1115— like the statute struck down in Shuttles-worth — confers “absolute discretion” on city officials to prevent a public demonstration. Brief for Plaintiffs-Appellants at 53. The dissent agrees with this argument, and finds controlling our decision in United States v. Abney, 534 F.2d 984 (1976) (per curiam). We disagree; the statutes are more different than they are similar, and their differences are constitutionally relevant. The statute in Shuttlesworth governed all demonstrations taking place in the *1471public streets of Birmingham. Demonstrators were required to obtain a permit from the city, which could be denied if the relevant commission determined “in its judgment [that] the public welfare, peace, safety, health, decency, good order, morals or convenience” so required. 394 U.S. at 149, 89 S.Ct. at 937. The regulation in Abney required anyone wishing to sleep, camp or loiter in Lafayette Park for more than four hours to obtain a permit from the Superintendent. The final clause of section 22-1115, in contrast, governs only the sensitive areas surrounding foreign embassies and other such official buildings. It establishes no permit procedure applicable to all demonstrations, but authorizes policemen who are on the scene to order dispersal.
We find unconvincing the dissent’s argument that procedures requiring permits, such as those invalidated in Shuttleswortk and Abney, are constitutionally indistinguishable from the police discretion involved here. Police have always possessed authority to require people to move when a statute supplies the criteria that guide and confine police discretion. This court upheld two such statutes granting police discretion no broader than that given by section 22-1115 in Washington Mobilization Committee v. Cullinane, 566 F.2d 107 (D.C.Cir. 1977). Section 22-1121(2) of the District of Columbia Code, provides:
Whoever, with intent to provoke a breach of the peace, or under circumstances such that a breach of the peace may be occasioned thereby — ____
(2) congregates with others on a public street and refuses to move on when ordered by the police;
shall be fined not more than $250 or imprisoned not more than ninety days, or both.
This statute requires the police to judge what constitutes a breach of the peace and what circumstances may lead to a breach of the peace, judgments of the same nature as those required by section 22-1115. Additionally, Article VI, § 5a of the District’s police regulations, known as the Police Line Regulation, authorizes a police officer to clear an area of the size he considers “necessary” for a variety of purposes when fires, accidents, etc., or “other occasions cause or may cause” persons to collect. Every person “shall comply with any necessary order or instruction of any police officer.” 16 This court, in reversing the district court’s invalidation of the regulation as allowing “unfettered discretion,” pointed out that it could not be known in advance what would be necessary on particular occasions so that “the regulation’s definition of the scope of police discretion in functional terms is reasonable, and ... meticulous specificity is not required.” 566 F.2d at 119.
The case before us is equally clear. The authority to disperse is given by a statute that has specific purposes. The authority may be exercised, therefore, only when the police reasonably believe that a threat to the security or peace of the embassy is present. The dissent would not suggest, we are confident, that a court would sustain a conviction under this stat*1472ute for refusal to disperse upon a policeman’s order if the policeman had acted out of personal malice, to prevent the sidewalk sale of neckties, or in order to interrupt what he suspected to be a conversation contemplating the sale of drugs. It is not a question of requiring proof of an “abuse of power” before voiding this provision. Dissent at 1499. We do not believe the provision grants police the power to disperse for reasons having nothing to do with the nearby embassy. In a word, the purposes of the statute supply the necessary criteria just as much as a “breach of the peace” ordinance does. The dissent refers to this as a “narrowing” construction, dissent at 1497, but we think it is simply the most plausible construction, one following the unexceptional principle that statutes are construed in light of the purposes behind their enactment. The dissent insists upon giving the statute the most expansive construction conceivable, one unrelated to the legislative purpose. We can see no reason for doing so, aside from the fact that it is easier to attack the inflated version. The discretion given by section 22-1115, being cabined by the statute’s purposes, is no broader than essential and is, therefore, constitutionally permissible.17
C.
Appellants next contend that the statute is overbroad, and sufficiently so to require facial invalidation. The overbreadth doctrine in first amendment law has taken a number of different forms, none of which provides grounds for sustaining appellants’ facial attack.
First, overbreadth constitutes an exception to traditional rules of standing, an exception applicable only in first amendment cases. Litigants to whom a statute is constitutionally applied cannot generally seek its invalidation because it infringes the rights of hypothetical individuals not before the court. In order to avoid the chilling effect of an overbroad regulation of speech, however, such a challenge will be permitted under the first amendment. See, e.g., Schaumburg v. Citizens for Better Environment, 444 U.S. 620, 100 S.Ct. 826, 63 L.Ed.2d 73 (1980).
Second, when the overbreadth of a statute is substantial with reference to its “plainly legitimate sweep,” Broadrick v. Oklahoma, 413 U.S. 601, 615, 93 S.Ct. 2908, 2917, 37 L.Ed.2d 830 (1973), and a narrowing construction is unavailable, facial invalidation will be in order. Over-breadth thus serves as both a jurisdictional doctrine and as a substantive doctrine of first amendment law. In such .cases, the fact that some of the activity regulated may constitutionally be subject to restrictions is insufficient to save the statute. See, e.g., Coates v. Cincinnati, 402 U.S. 611, 91 S.Ct. 1686, 29 L.Ed.2d 214 (1971).
Third, where the party challenging the statute is himself engaged in protected speech which the overbroad statute seeks to punish, a court will follow the more traditional practice — invalidate the statute to the extent that it reaches protected conduct, while leaving the remainder intact. In such instances, the Court leaves in force that portion of the statute that regulates activity in a constitutionally permissible manner. See, e.g., Brockett v. Spokane Arcades, Inc., — U.S. —, 105 S.Ct. 2794, 86 L.Ed.2d 394 (1985).
While appellants regard their own planned activities as protected, they do not offer any limiting construction to this court. They seek instead a facial invalidation on grounds of overbreadth. The Supreme Court has characterized the facial *1473invalidation of a statute because of over-breadth as “manifestly, strong medicine,” to be employed “sparingly.” Broadrick v. Oklahoma, 413 U.S. at 613, 93 S.Ct. at 2916. The Court has therefore held that “particularly where conduct and not merely speech is involved, ... the overbreadth of a statute must not only be real, but substantial as well, judged in relation to the statute’s plainly legitimate sweep.” Id. at 615, 93 S.Ct. at 2917. When the central requirement of substantiality is met, it is often because the statute contains a fundamentally illegitimate predicate for government action, or was premised on an unsupported assumption that purported to tie its means to its ends. For example, in Coates v. Cincinnati, the Supreme Court struck down a city ordinance forbidding three or more persons from assembling on a sidewalk and conducting themselves “in a manner annoying to persons passing by.” 402 U.S. at 611, 91 S.Ct. at 1686. The statute was overbroad because, while many annoying activities — such as disturbance of the peace — could constitutionally be regulated, “mere public intolerance or animosity cannot be the basis” for such a law. Id. at 615, 91 S.Ct. at 1689. In Schaumburg v. Citizens for a Better Environment, an ordinance prohibiting street solicitations by charitable organizations that did not use at least 75% of their receipts for “charitable purposes” was invalid because — despite the fact that some of these organizations were undoubtedly subject to regulation — the percentage figure was not a relevant measure of the integrity of the organization, or the threat it posed to public safety or residential activity, which were the interests asserted to be at stake. 444 U.S. at 636, 100 S.Ct. at 835. In such cases, what renders a statute’s overbreadth substantial is that the error taints the entire provision— the statute “in all its applications directly restricts protected First Amendment activity and does not employ means narrowly tailored to serve a compelling governmental interest.” Secretary of State of Maryland v. Joseph H. Munson Co., 467 U.S. 947, 965-66 n. 13, 104 S.Ct. 2839, 2851-52, 81 L.Ed.2d 786 (1984) (emphasis added). Even when all its applications are not so tainted, a statute may be substantially overbroad when its potential for application to protected activity overwhelms its potential for application to unprotected activity.
Our analysis is guided by Broadrick v. Oklahoma, in which the Court explained:
[T]he plain import of our cases is, at the very least, that facial overbreadth adjudication is an exception to our traditional rules of practice and that its function, a limited one at the outset, attenuates as the otherwise unprotected behavior that it forbids the State to sanction moves from “pure speech” toward conduct and that conduct — even if expressive — falls within the scope of otherwise valid criminal laws that reflect legitimate state interests in maintaining comprehensive controls over harmful, constitutionally unprotected conduct. Although such laws, if too broadly worded, may deter protected speech to some unknown extent, there comes a point where that effect — at best a prediction —cannot, with confidence, justify invalidating a statute on its face and so prohibiting a State from enforcing the statute against conduct that is admittedly within its power to proscribe.
413 U.S. at 615, 93 S.Ct. at 2917 (emphasis added).
Appellants have not made anything like the showing of substantial over-breadth needed to justify a facial invalidation. They argue that the statute is over-broad because
[i]t prohibits any form of peaceful expression by any member of the public who displays a sign designed to disagree with a foreign government’s views. It goes so far as to prohibit anyone with an anti-Soviet lapel button from walking within 499 feet of the Soviet Embassy.
Brief for Plaintiffs-Appellants at 50-51.
Any statute that sets clear limits — and so avoids the charge of vagueness — will be subject to this sort of overbreadth attack. It might be noted that the statute does not apply when someone with an eight-foot, *1474anti-Soviet sign stands 501 feet from the Soviet Embassy. The only cure for the kind of overbreadth appellants complain of would be a statute that carefully correlated the size of signs and lettering with the permissible degree of distance from the Embassy. The person wearing the lapel button might be allowed to go up to ten feet from the property while the person with the eight-foot sign might not be allowed within a thousand feet. The first amendment does not require such a complex and difficult-to-police sliding scale. Congress has made a reasonable attempt to balance the interests protected by the first amendment and the combined interests of United States foreign policy and obligations under international law. The balance struck is, as it should be, favorable to first amendment interests.
In addition to the need to ensure security, the other requirement imposed by the Vienna Convention — the maintenance of the peace and dignity of the embassy premises — is clearly contained within section 22-1115’s “plainly legitimate sweep,” and demonstrations, even those by lone protestors, may threaten fulfillment of that obligation without necessarily posing a threat of violence. Appellants thus offer us no real basis on which to conclude that section 22-1115 is overbroad or substantially so.18
D.
Appellants have offered one further argument meriting discussion — that the content-based restriction itself is not narrowly tailored to serving the interests at stake and is therefore unconstitutional.19 Were we to accept this argument, we would have to strike the statute in its entirety. We can imagine other statutes, however, in which the element of content discrimination would be more neatly severable — statutes, for example, which exempt narrow categories of speech from regulations otherwise universally applicable.20 In such instances, if the court were to strike only the element of discrimination and leave a flat and neutral prohibition in place, it would be narrowly tailoring the statute by broadening its application — a peculiar outcome, but one that would end the equal protection problem. We note this anomaly to illustrate the potential clash between the first amendment doctrines of overbreadth and equality. As a legislature narrows a statute to ensure that no more speech is regulated than is absolutely necessary, it begins differentiating among types of speech activities. A total prohibition, in contrast, is the most neutral statute of all.
The differentiation at issue in this case is easy to justify. This statute was enacted in order to protect foreign embassies from the potential of violence, and threats to its peace and dignity, and to enhance the security of our own diplomats and citizens overseas. Demonstrations called to express support for foreign governments in *1475front of their embassies simply do not threaten these interests. Congress was not obliged to regulate such demonstrations for the sake of symmetry, and its decision not to do so does not disable it from regulating demonstrations that do threaten these interests. It is precisely because this statute is narrowly tailored that it contains a content-based restriction. The content-based portion of section 22-1115 is thus tailored to serve two compelling interests simultaneously — it regulates expressive conduct that may threaten to undermine American compliance with international law and the safety of foreign and American diplomats, while leaving unregulated expressive conduct that does not. It would turn overbreadth analysis on its head to maintain that Congress is required to regulate more speech than necessary.
There is some force to the argument that a broad regulation which affects all speech equally raises fewer constitutional problems than one which regulates less aggregate speech but discriminates while doing so. At the very least, they raise different problems. However, the fundamental concern underlying the disfavored status accorded content-based restrictions is not implicated by section 22-1115. There is no “preferred view” the government is seeking to promote, nor a minority view it seeks to suppress. In fact, there is no single point of view targeted at all; under the most reasonable interpretation of the statute, see supra note 18, what is prohibited in front of the East German Embassy is permitted in front of the West German one, and vice versa.21 We therefore do not find the distinction embodied in section 22-1115 troublesome, although it is indisputably content-based. A principle of international law that shields embassies from various forms of hostile activity is itself necessarily content-based. In order to protect the safety, peace and dignity of foreign embassies, Congress need not prohibit speech activities that it deems do not implicate such concerns, any more than a locality that wished to prohibit the shouting of “Fire!” in a crowded theatre would be constitutionally required to outlaw the shouting of “Encore” as well.22
*1476VI.
The dissent’s apocalyptic version of what is at stake here requires that we once more attempt to place this case in realistic perspective. The dissent argues as though the statute before us attempted the general suppression of entire categories of speech rather than merely preventing the offering of political insult within the immediate vicinity of a foreign embassy. The placard provision of the statute involves only the latter and, for that reason, the dissent’s extensive quotations about the central role of the first amendment in our national life are, to say the ■ least, disproportionate. This is simply not a statute that threatens “our free speech birthright,” the “silencing of Americans in their views,” the “distort[ion of] the marketplace of ideas,” or the “mutilatpon of] ‘the thinking process of the community.’ ” Dissent at 1477, 1487, 1490. The excitement generated by such rhetoric is quite spurious in the context of the 500-foot radius in which this regulation operates.
The dissent objects to section 22-1115 on the ground that it bars only the carrying of hostile placards and not of supportive placards within 500 feet of an embassy. The ground for this objection is that the narrower prohibition distorts the marketplace of ideas by allowing the presentation of one side only.
This objection is entirely theoretical; indeed, if the word may be used in a pejorative sense, it is merely academic. There simply is not and never has been a problem with carriers of supportive placards. More to the point, there is not and never has been political debate about the merits of foreign governments and their policies within 500 feet of their embassies. The dissent’s argument conjures up a picture of rival speakers at podiums before the Nicaraguan embassy while the nation watches. There is simply no reality in that picture. The debate about Nicaragua is carried on in innumerable fora in Washington and across the nation but no such debate has entered the marketplace of ideas and our nation’s political process from the area bounded by a radius extending 500 feet from 1627 New Hampshire Avenue, N.W. If preventing Finzer from displaying a sign critical of the Sandinistas at that address has mutilated the thinking process of the community, the effect has not been noticeable.
In response, the dissent makes reference to the anti-apartheid demonstrators who have picketed the South African Embassy this last year, and to the significance of their protest in shaping the public debate. Dissent at 1499-1500. It is difficult to know what point the dissent seeks to make with this example. The “less restrictive” alternative favored by the dissent would have prohibited those demonstrations as thoroughly as section 22-1115. The question is whether the public debate has in any way been warped out of shape because these demonstrations are prohibited and some wholly imaginary supportive demonstrations are not. To state the question is to answer it.
VII.
While we hold therefore that section 22-1115 is constitutional, we remand to the district court with instructions to make factual and legal findings with respect to one further issue. The Complaint and Declarations below contained allegations of incidents in which police officers, claiming to be enforcing section 22-1115, prevented some of the appellants from engaging in activity which section 22-1115 plainly does not proscribe. For example, Finzer claims to have been prevented from kneeling on the sidewalk directly in front of the Soviet Embassy to pray silently, Declaration of Father R. David Finzer at 2, R.E. at 16, and Brooker describes an occasion in which she was told she could not stand in front of the Soviet Embassy “to say the Lord’s Prayer.” Declaration of Bridget Brooker at 2, R.E. at 22. The record does not reveal the context in which these incidents took place, but we note that the first part of section 22-1115 applies only when a protestor is carrying a sign of some sort, and the second part applies only when a congregation *1477of people has been ordered to disperse. See Zaimi v. United States, 476 F.2d 511 (D.C.Cir.1973). If neither of these conditions applied, then the appellants were wrongfully prevented from conducting their protest. While the District of Columbia Corporation Counsel has indicated that appellants will not be prosecuted for such activity, Defendants’ Statement of Material Facts in Dispute, R.E. at 34, we have no similar statement before us from the Office of the United States Attorney in Washington, D.C., which also has prosecutorial jurisdiction over these matters. If section 22-1115 has been interpreted to prohibit conduct that is in fact clearly beyond its scope, a declaratory judgment prohibiting official interference with activities outside its proper reach would be appropriate.
VIII.
We wish to reiterate, in conclusion, the special circumstances that surround the provision whose constitutionality we have upheld. It represents an exercise by Congress not simply of the police power, but of its authority and responsibility under the Constitution to impose upon citizens what it understands to be the obligations required by international law. It does not eliminate any point of view from our political discourse, but sets aside the space immediately surrounding foreign embassies as an area free from hostile protest. The unique restrictions imposed are justified by the unique interests that are at stake, interests which include the safety of American personnel living abroad in a time in which international incidents provide regular reminders of the precariousness of their position. We think Congress acted within its authority when it required that these demonstrations take place elsewhere in the District. We therefore affirm the constitutionality of section 22-1115, and remand this case to the district court for a determination of whether the local authorities have exceeded the scope of their statutory authority.
It is so ordered.
. The full text of D.C.Code § 22-1115 (1981) reads as follows:
It shall be unlawful to display any flag, banner, placard, or device designed or adapted to intimidate, coerce, or bring into public odium any foreign government, party, or organization, or any officer or officers thereof, or to bring into public disrepute political, social, or economic acts, views, or purposes of any foreign government, party, or organization, or to intimidate, coerce, harass, or bring into public disrepute any officer or officers or diplomatic or consular representatives of any foreign government, or to interfere with the free and safe pursuit of the duties of any diplomatic or consular representatives of any foreign government, within five hundred feet of any building or premises within the District of Columbia used or occupied by any foreign government or its representative or representatives as an embassy, legation, consulate, or for other official purposes, except by, and in accordance with, a permit issued by the Chief of Police of the said District; or to congregate within five hundred feet of any such building or premises, and refuse to disperse after having been ordered so to do by the police authorities of the said District.
. We note that the same conclusion has recently been reached by the Superior Court of the District of Columbia, which upheld § 22-1115 against precisely the same challenges presented here. United States v. Brown, No. M-10901-83 (D.C.Super.Ct. Jan. 20, 1984).
. President Fillmore, Message to Congress, Dec. 2, 1851, 6 J. Moore, International Law Digest 813 (1906).
. The Act of State doctrine is a reflection of judicial adherence to a similar principle: courts will allow what may be an expropriation to take place rather than inquire into the representations made by a foreign government with respect to acts within its borders, in part out of a reluctance to “give offense,” Banco Nacional de Cuba v. Sabbatino, 376 U.S. 398, 432, 84 S.Ct. 923, 942, 11 L.Ed.2d 804 (1964), and in order to “avoid disrespect for foreign states." § 469 comment a Restatement of Foreign Relations Law (Revised) (Tent.Draft No. 7, 1986).
. As we have indicated, Article 22 of the Vienna Convention created no new law, but rather codified doctrine that already existed. In similar fashion, the Harvard Draft Convention on Diplomatic Privileges and Immunities, published in 1932, provided that:
A receiving state shall protect the premises occupied or used by a mission, or occupied by a member of a mission, against any invasion or other act tending to disturb the peace or dignity of the mission or of the members of a mission....
26 Am.J.Int’l L. 20-21 (Supp.1932). According to the commentary accompanying the Convention:
Protection against invasion of the premises of a mission ... means protection against any attempt to enter the premises against the will of the chief or other members of the mission. The duty, however, goes further than that. The receiving state is under a duty to protect the premises against any acts tending to interfere with the enjoyment or possession of such premises____ The special duty of protection of premises would include protection against crowds or mobs collected in the vicinity of the premises for the purpose of expressing abuse, contempt or even disapprobation of the sending state or of its mission, or of the members of a mission. A similar duty would seem to exist to protect such premises against so-called "picketing,” this being an act tending to disturb the peace and dignity of the mission.
Id. at 56-57.
. Contrary to the suggestion made by the dissent, dissent at 1484 n. 8, first amendment cases are no exception to this principle. See Kleindienst v. Mandel, 408 U.S. 753, 92 S.Ct. 2576, 33 L.Ed.2d 683 (1972).
. Appellants claim that the district court’s reliance on the assertions contained in these declarations was improper and in the event their argument that the statute is facially unconstitutional is rejected, they urge that we remand the case so that the assertions can be contested at trial. Appellants misconceive the responsibility of a party opposing a motion for summary judgment. The mere mention to the district court that plaintiffs "vigorously dispute" statements made in declarations, R.E. at 60, without any supporting citations to the record, see Local Rule l-9(i), will not serve to call into question the contentions made by the opposing parties. See Fed.R.Civ.P. 56(e) ("When a motion for summary judgment is made and supported ... an adverse party may not rest upon the mere allegations or denials of his pleading, but his response, by affidavits or as otherwise provided in this rule, must set forth specific facts showing that there is a genuine issue for trial.”).
. The Fields Declaration cites an incident that illustrates the importance of this buffer:
*1462Another example of this problem occurred recently in connection with a demonstration near the Soviet Embassy here by a group of Afghans protesting the Soviet invasion of Afghanistan. The demonstrators broke through police lines, but due to the 500-foot distance separating them from the Embassy premises, police were able to re-establish control, making a number of arrests in the process, before the demonstrators could reach the building.
Had the distance separating^the demonstrators from the Embassy Been less, the results probably would have been quite different,'and property damage and personal injury to the embassy and its occupants might well l ave resulted, with potentially serious consequences for U.S. foreign relations and I the security of U.S. personnel overseas. ]
Declaration of David Fields at_3-4, R.E. at/ 38-39.
. Appellants suggest that the existence of 18 U.S.C. § 112(b) (1982) demonstrates that Congress could have achieved the same ends with a narrower statute. 18 U.S.C. § 112(b) regulates demonstrations near embassies and other buildings owned by foreign governments outside the District of Columbia, and is somewhat less restrictive than § 22-1115 of the D.C.Code. The unstated premise of this argument, however, is that the governmental interests at stake in these two statutes are indistinguishable. In fact, the same Congress that enacted § 112(b) in its present form — amending a more restrictive version than had been enacted some years before— left § 22-1115 alone. There are several plausible reasons why Congress might choose to differentiate between the two. The greater concentration of embassies in the District of Columbia, and the special visibility of the capital, may well make enhanced protection necessary. In addition, Congress relies to some extent on the state and local governments to provide whatever additional measures are necessary to protect foreign nationals, aware perhaps that security needs may differ from state to state. See Concerned Jewish Youth v. McGuire, 621 F.2d 471, 475 (2d Cir.1980) (18 U.S.C. § 112(b) did not set "maximum standards of protection,” and left open possibility of local authorities using "stricter controls”). Therefore, the fact that Congress generally exercises much more direct and specific authority over municipal activities in the District of Columbia than those in other cities may well explain the differences between the measures adopted in the two statutes. We note in this regard that the authority of the United States Secret Service over matters involving the protection of foreign embassies is substantially greater for those embassies located within the District than for those located outside. 3 U.S.C. § 202 (1982).
. The dissent is correct when it points out that "the ‘greater’ power does not necessarily include the lesser.” Dissent at 1492. Therefore, the fact that a broad, content-neutral prohibition would be constitutional does not, by itself, imply that all less broad, content-based statutes are necessarily constitutional too. In Police Department of the City of Chicago v. Mosley, 408 U.S. 92, 92 S.Ct. 2286, 33 L.Ed.2d 212 (1972), Grayned v. Rockford, 408 U.S. 104, 92 S.Ct. 2294, 33 L.Ed.2d 222 (1972), and Carey v. Brown, 447 U.S. 455, 461-62, 100 S.Ct. 2286, 2290-91, 65 L.Ed.2d 263 (1980), the mere fact that total antipicketing laws might be constitutional did not justify laws that permitted some picketing but not others on the basis of content. In those cases, however, the statutes were infirm not because there was a constitutionally acceptable content-neutral alter*1466native, but because the distinctions embodied in the statutes were not narrowly tailored to serve compelling government interests.
. The dissent’s heavy reliance on Schacht v. United States, 398 U.S. 58, 90 S.Ct. 1555, 26 L.Ed.2d 44 (1970), is misplaced. The viewpoint-discrimination in Schacht did not serve any legitimate governmental interest. It appears from the decision that the government did not claim otherwise, and chose to defend its position on other grounds.
. The dissent need not be troubled by our citation of this unpublished order. The Circuit Rule only forbids citing such orders "as precedent,” Western Union Telegraph Co. v. FCC, 773 F.2d 375, 377 n. 1 (D.C.Cir.1985), which we do not do. We mention Jackalone only because it serves to illustrate a realistic scenario in which the dissent’s theory would require an incorrect result. While the regulation under which the permit in Jackalone was denied is content-neutral, it is clear from the brief that the government's rationale for forbidding the demonstration by Iranian students in front of the Iranian ■embassy was that the demonstration was likely to attract hostile onlookers, and that news reports describing and televising Americans shouting obscenities at Iranian students in front of the embassy would have endangered American diplomatic personnel in Iran by angering the Iranian government. This judgment was made on the basis of the content and viewpoint of the demonstration, and on the nationality of the demonstrators. While this is an extreme example, the parallels to § 22-1115 are evident, since the dissent’s requirement that neutral prohibitions be chosen over non-neutral ones is not affected by the strength of the governmental interest involved.
. See, e.g., Farber, Content Regulation and the First Amendment: A Revisionist View, 68 Geo. L.J. 727 (1980); Stephan, The First Amendment and Content Discrimination, 68 Va.L.Rev. 203 (1982); Stone, Restrictions of Speech Because of its Content: The Peculiar Case of Subject-Matter Restrictions, 46 U.Chi.L.Rev. 81 (1978).
. Contrary to the suggestion made by the dissent, dissent at 1493 n. 18, we do not attribute “relevance to the Court’s silence" in Parker, for the Court was not silent. In the course of rejecting the overbreadth challenge, the Court held that Levy’s conduct — illegal because of the content of his public statements, 417 U.S. at 736-37, 739, 94 S.Ct. at 2552-53 — was "unprotected under the most expansive notions of the First Amendment” and that the regulations at issue “may constitutionally prohibit” it. Id. at 761, 94 S.Ct. at 2564. The dissent correctly notes that the reasoning in Parker relies heavily on the military context of these regulations. We therefore do not regard Parker as dispositive in this case, except insofar as it demonstrates that the suggestion by appellants that all viewpoint distinctions are per se unconstitutional is unfounded — a suggestion about which the dissent is ambivalent. Dissent at 1494.
. Under the most recent Supreme Court precedent, § 22-1115 may not in fact qualify as a content-based statute. In City of Renton v. Playtime Theatres, Inc., — U.S.—, 106 S.Ct. 925, 89 L.Ed.2d 29 (1986), the Court found constitutional a zoning ordinance that prohibits "adult” motion picture theatres from locating within one thousand feet of any residential zone, single- or multiple-family dwelling, church, park, or school. Writing for six members of the Court, Justice Rehnquist explained that while the ordinance "treats theatres that specialize in adult films differently from other kinds of theatres,” it nevertheless was aimed not at the content of the films "but rather at the secondary effects of such theatres on the surrounding community.” Id. at — U.S. at—, 106 S.Ct. at 929 (emphasis in original). It was thus "completely consistent with our definition of ‘content-neutral’ speech regulations as those that ‘are justified without reference to the content of the regulated speech.’ ” Id. (quoting Virginia Pharmacy Board v. Virginia Citizens Consumer Council, Inc., 425 U.S. 748, 771, 96 S.Ct. 1817, 1830, 48 L.Ed.2d 346 (1976) (emphasis added in City of Renton)). Similarly, § 22-1115, while differentiating on the basis of the content of the speech, is justified by reference to content-neutral values — the need to adhere to principles of international law and to provide sufficient protection to foreign embassies. Because we are not entirely sure, from City of Renton alone, whether § 22-1115 is the sort of statute that can be analyzed under the standard applicable to *1470content-neutral time, place and manner restrictions, and because we believe it meets the more stringent standard to which content-based restrictions have traditionally been held, we focus on that latter standard.
. The pertinent text of the Police Line Regulation is as follows:
Sec. 5a. When fires, accidents, wrecks, explosions, parades, or other occasions cause or may cause persons to collect on the public streets, alleys, highways, or parkings, the Chief of Police, inspector, captain of police, or officer acting for him, may establish such area or zone as he considers necessary for the purpose of affording a clearing for: (1) the operation of firemen or policemen; (2) the passage of a parade; (3) the movement of traffic; (4) the exclusion of the public from the vicinity of a riot, disorderly gathering, accident, wreck, explosion, or other emergency; and (5) the protection of persons and property. Every person present at the scene of such an occasion, shall comply with any necessary order or instruction of any police officer. No person shall enter such area or zone, unless duly authorized by the person in command on such an occasion; Provided, That bona fide representatives of the press and bona fide insurance adjusters or underwriters and such other persons as the Chief of Police may authorize to be within such space, and who shall have plainly exposed to view the press pass or fire pass described in this section, shall be permitted within the lines established by the Police Department under the conditions named in the following paragraph____
. The dissent states that we have ignored circuit precedent by reading the second clause of § 22-1115 as we do. The precedent to which the dissent refers is Zaimi, 476 F.2d at 515, in which we held that the second clause was functionally separate from the first. The dissent misunderstands our analysis. We do not believe that the second clause is limited by the first, i.e., that police may order dispersal only where the congregation is displaying signs of the sort described. Rather, we believe the provision is limited by the general purposes which motivated the enactment of the statute as a whole, Le., protection of the peace and security of the embassy. Dispersals may only be ordered in accord with those purposes.
. Appellants also contend that the statute is substantially overbroad because it regulates criticism of any foreign government in front of any foreign embassy. In other words, the statute, in appellants' view, prohibits an anti-Israel demonstration in front of the Syrian Embassy. We think this construction implausible in light of the purposes behind the provision’s enactment. We think it in any event precisely the sort of challenge that ought to be made by an individual prevented from so demonstrating, and one which, if successful, would call for a limiting construction rather than facial invalidation. In the absence of any evidence that the statute has ever been applied in such a fashion, we will not entertain such a challenge now. See Regan v. Time, 468 U.S. at 649-52, 104 S.Ct. at 3267-69 (overbreadth challenge "unavailing” when there is "no evidence” that the statute will be interpreted as feared).
. Appellants also maintain that the exception to § 22-1115 for labor picketing, codified in § 22-1116, is an unconstitutional content-based restriction. We reject this argument for the reason given by the three-judge court in Jewish Defense League v. Washington, 347 F.Supp. 1300 (D.D.C.1972).
. The law invalidated by the Supreme Court in Police Department of Chicago v. Mosley, 408 U.S. 92, 92 S.Ct. 2286, 33 L.Ed.2d 212 (1972), was one such statute. It prohibited all picketing within 150 feet of a school, except peaceful picketing of any school involved in a labor dispute. The Court held that the statute violated the equal protection clause, but never explained its decision to strike the statute rather than the exemption.
. In a declaration filed below, Father Finzer stated: "I ... believe that my conservative colleagues and I are being discriminated against because of the nature of our political beliefs.” Declaration of Father R. David Finzer at 5, R.E. at 19. Appellants have supplemented the record before us with a press release issued by the city government, entitled “District Drops Charges in South Africa Case.” In this press release. District of Columbia Corporation Counsel Inez Smith Reid announced that the District would be dropping charges against five persons who crossed a police barricade during a demonstration at the South African Embassy. Ms. Reid said:
It would be untenable for the Office of the Corporation Counsel to prosecute these five individuals who demonstrated peaceably to call attention to the gross injustices which result from the South African policy of apartheid. We are aware that the United States . Attorney for the District of Columbia has dropped charges against several of those arrested at the South African Embassy. For us not to do so would set an inconsistent policy with respect to the prosecution of those , arrested at the South African Embassy. Finally, no significant District of Columbia interest would be served by these prosecutions.
These five individuals were arrested pursuant to local laws, while those the U.S. Attorney decided not to prosecute had been arrested pursuant to § 22-1115.
We do not have before us any similar documents from the U.S. Attorney’s office and we decline to speculate, absent substantial evidence, about its motives and rationales. We note, however, that a statute constitutional on its face may not be applied in an unconstitutional manner. Yick Wo v. Hopkins, 118 U.S. 356, 65 S.Ct. 1064, 30 L.Ed.220 (1886). The boundaries of prosecutorial discretion are quite wide, but they are not limitless. Oyler v. Boles, 368 U.S. 448, 456, 82 S.Ct. 501, 505, 7 L.Ed.2d 446 (1962). Because the plaintiffs before us have not pressed a claim of selective prosecution, we offer no opinion on the constitutional issues such a claim might raise.
. The dissent misses the point of this analogy, dissent at 1495 n. 22, which is that when only one particular category of speech threatens the legitimate interest the legislature seeks to promote, other, nonthreatening categories need not necessarily be regulated as well. The dissent compares § 22-1115 to a law allowing theatre-goers to shout "Encore" but not "Boo.” If shouting "Boo,” but not "Encore,” had the same effect as shouting "Fire,” then the law could permissibly regulate the shouting of “Boo” and "Fire” while leaving "Encore” alone.