¶1 The question in this case has been certified to us from the United States District Court for the Eastern District of Washington:
Whether a public library, consistent with Article I, § 5 of the Washington Constitution, may filter Internet access for all patrons without disabling Web sites containing constitutionally-protected speech upon the request of an adult library patron.[1]
We conclude that a library can, subject to the limitations set forth in this opinion, filter Internet access for all patrons, including adults, without violating article I, section 5 of the Washington State Constitution.
FACTS
¶2 The facts summarized here are taken from the district court’s order granting in part and denying in part defendant North Central Regional Library District’s (NCRL) motion for certification. Bradburn v. N. Cent. Reg’l Library *794Dist., CV-06-0327-EFS, Order Granting and Den. in Part Def.’s Mot. for Cert. and Holding in Abeyance the Mots. for Summ. J. (E.D. Wa. Sept. 30, 2008) (hereinafter Order).
¶3 NCRL is an intercounty rural library district with 28 branch libraries, established in 1960 by citizens of Chelan, Douglas, Ferry, Grant, and Okanogan Counties. Its mission is to promote reading and lifelong learning. It is also committed to support of public education, with 26 school districts operating within its area. In 14 of these districts, the branch libraries act as de facto school libraries. NCRL is managed and controlled by a board of trustees that is responsible for its policies.
¶4 NCRL maintains a collection of more than 675,000 books and other materials that are available to its patrons at the branch libraries, by order through its web site, or by mail order. The branch libraries vary in size from 701 square feet of public area to 12,000 square feet, with an average of 2,865 square feet. Only one branch has a wall or partition separating the children’s section of the library from the rest of it. Twenty of the branches are staffed by one librarian.
¶5 NCRL provides public Internet access in all of its branches in furtherance of its mission and to meet the diverse needs and interests of its patrons. This access is subject to two policies, the Collection Development Policy and the Internet Public Use Policy. NCRL’s director and the director of public services interpret and apply these policies.
¶6 NCRL’s Collection Development Policy states:
The North Central Regional Library District’s Board of Trustees recognizes that the library was created to serve all of the people within the District’s service area, regardless of race, age, creed, or political persuasions. The Board of Trustees further recognizes that within the District’s service area there are individuals and groups with widely disparate and diverse interests, cultural backgrounds, and needs. The Board of Trustees, therefore, declares as a matter of policy that:
*7951. The Collection Development Policy is based on and reflects the District’s mission, goals, and values as stated in the current Strategic Plan.
2. Library materials shall be selected and retained in the library on the basis of their value for the interest, information, and enlightenment of all the people of the community in conformance with the District’s mission. Some of the factors which will be considered in adding to or removing materials from the library collection shall include: present collection composition, collection development objectives, interest, demand, timeliness, audience, significance of subject, diversity of viewpoint, effective expression, and limitation of budget and facilities.
No library materials shall be excluded because of the race, nationality, political, religious, or social views of the author. Not all materials will be suitable for all members of the community.
The District shall be responsive to public suggestion of titles and subjects to be included in the library collection. Gifts of materials may be accepted with the understanding that the same standards of selection are applied to gifts as to materials acquired by purchase, and that any gifts may be discarded at the District’s discretion.
To ensure a vital collection of continuing value to the community, materials that are not well used may be withdrawn.
The Director is responsible to the Board of Trustees for collection development.
The Director may delegate collection development activities to members of the staff who are qualified by reason of education and training.
3. The Board of Trustees believes that reading, listening to, and viewing library materials are individual, private matters. While individuals are free to select or to reject materials for themselves, they cannot restrict the freedom of others to read, view, or inquire. The Board of Trustees recognizes that parents have the primary responsibility to guide and direct the reading and viewing of their own minor children.
The Board of Trustees recognizes the right of individuals to question materials in the District collection. A library customer *796questioning material in the collection is encouraged to talk with designated members of the staff concerning such material. To formally state his or her opinion and receive a written response, a customer may submit the form provided for that purpose.
Order at 8-9.
¶7 NCRL’s Internet Public Use Policy states:
The mission of the North Central Regional Library is to promote reading and lifelong learning. Internet access is offered as one of many information resources supporting that mission.
The Internet is currently an unregulated medium. While the Internet offers access to materials that are enriching to users of all ages, the Internet also enables access to some materials that may be offensive, disturbing, or illegal. There is no guarantee that information obtained through the Internet is accurate or that individuals are who they represent themselves to be. The library district recognizes that it cannot fully control the amount of material accessible through the Internet but will take reasonable steps to apply to the Internet the selection criteria stated in the Collection Development Guidelines and Procedures.
All Internet access on NCRL library computers is filtered.
The library district does not host customer e-mail accounts or provide access to chat rooms.
The library district cannot guarantee privacy for individuals using library public access computers to search the Internet and computer screens may be visible to people of all ages, backgrounds, and sensibilities. Customers are requested to exercise appropriate discretion in viewing materials or submitting sensitive personal information. Minors, in particular, are discouraged from sharing personal information online. Hacking and other unlawful online activities are prohibited. The District’s director is responsible for establishing procedures to carry out this policy.
Id. at 9-10.
¶8 In October 2006, following its earlier use of other software, NCRL implemented the “FortiGuard Web Filtering Service,” a widely used filtering service. Using propri*797etary algorithms and human review, FortiGuard sorts web sites into 76 categories based upon predominant content. The database catalogues over 43 million web sites and over 2 billion individual web pages. It is continually updated. Anyone can ask FortiGuard to review its classification of a particular site or page by using an electronic form available on the Fortinet site.
¶9 A “FortiGate unit,” which acts as an intermediary between a computer’s browser and the server, is installed at each of NCRL’s 28 branches. All Internet traffic on NCRL’s public computers is routed through one of these units, which filters content.
¶10 NCRL’s FortiGuard filter is configured to block the following of the 76 categories that can be blocked using the FortiGuard system:
Hacking: Websites that depict illicit activities surrounding the unauthorized modification or access to programs, computers, equipment and websites.
Proxy Avoidance: Websites that provide information or tools on how to bypass Internet access controls and browse the Web anonymously, includes anonymous proxy servers.
Phishing: Counterfeit web pages that duplicate legitimate business webpages for the purpose of eliciting financial, personal or other private information from the users.
Adult Materials: Mature content websites (18+ years and over) that feature or promote sexuality, strip clubs, sex shops, etc. excluding sex education, without the intent to sexually arouse.
Gambling: Sites that cater to gambling activities such as betting, lotteries, casinos, including gaming information, instruction, and statistics.
Nudity and Risqu[é]: Mature content websites (18+ years and over) that depict the human body in full or partial nudity without the intent to sexually arouse.
Pornography: Mature content websites (18+ years and over) which present or display sexual acts with the intent to sexually arouse and excite.
Web Chat: Websites that promote Web chat services.
*798Instant Messaging: Websites that allow users to communicate in “real-time” over the Internet.
Malware: Sites that are infected with destructive or malicious software, specifically designed to damage, disrupt, attack or manipulate computer systems without the user’s consent, such as virus or trojan horse.
Spyware: Sites that host software that is covertly downloaded to a user’s machine, to collect information and monitor user activity, including spyware, adware, etc.
Id. at 11-12.
¶11 NCRL also blocks the “Image Search,” “Video Search,” and “Spam” classifications, certain specific image search web sites, and the “personals” section of craigslist.org. NCRL also initially blocked but subsequently unblocked access to youtube.com, myspace.com, and craigslist.org (except for the “personals” section).
¶12 In addition, to qualify for certain federal funding, i.e., discounted Internet access and grants available to state libraries, NCRL is required to certify its compliance with the Children’s Internet Protection Act (CIPA), Pub. L. No. 106-554, 114 Stat. 2763A-335 (codified at 20 U.S.C. § 6777, 20 U.S.C. § 9134, former 47 U.S.C. 254(h) (2004)). As explained in United States v. American Library Ass’n, 539 U.S. 194, 123 S. Ct. 2297, 156 L. Ed. 2d 221 (2003) (hereinafter A.L.A.), CIPA requires libraries to employ measures that prohibit access by minors to depictions that are obscene, child pornography, or otherwise harmful to minors.
¶13 NCRL also has a policy that its Internet filter not be disabled at the request of an adult patron. This means that if material is appropriately blocked under the Internet Use Policy, it is not unblocked upon request. However, if the material is erroneously blocked, it can be unblocked upon request.
¶14 Plaintiffs Sarah Bradburn, Pearl Cherrington, and Charles Heinlen are patrons of NCRL who use or have used computers that NCRL has made available to access the *799Internet. Each claims that access to certain web sites was blocked by NCRL’s Internet filter. Plaintiff Second Amendment Foundation (SAF) is a Washington nonprofit corporation dedicated to issues associated with the constitutional right to keep and bear firearms, with about 1,000 members in the counties served by NCRL. SAF has a web site and sponsors on-line publications, including Women and Guns. SAF was advised by a member or members that access to its publication www.womenandguns was blocked on NCRL’s computers. Prior to this lawsuit, NCRL had not received any report that this site was blocked and does not contend that it should be blocked. It is not presently blocked. SAF is concerned about possible future blocking.
¶15 Plaintiffs brought suit against NCRL, challenging the filtering policy’s constitutionality and, in particular, NCRL’s decision that it would not disable the filter at the request of an adult (except in the case of a site’s being blocked when it did not in fact fall within a prohibited category such as spyware, gambling, or pornography).
ANALYSIS
¶16 Certified questions from federal court are questions of law that we review de novo. In re F5 Networks, Inc., 166 Wn.2d 229, 236, 207 P.3d 433 (2009). We do not consider the legal issues in the abstract but instead consider them based on the certified record that the federal court provides. RCW 2.60.030(2); St. Paul Fire & Marine Ins. Co. v. Onvia, Inc., 165 Wn.2d 122, 126, 196 P.3d 664 (2008).
¶17 The plaintiffs claim that NCRL’s Internet filtering policy is overbroad and, more specifically, so overbroad as to rise to the level of a prior restraint in violation of article I, section 5. They also contend that the filtering policy is an impermissible content-based restriction on speech. NCRL maintains that use of the FortiGuard filter makes it possible to provide its patrons access to vast amounts of constitutionally protected material while ensuring that *800on-line resources are aligned with its mission and collection policy, the interests of public education are advanced, and a safe and appropriate environment for staff and patrons is maintained. NCKL maintains that its filtering policy is constitutional under article I, section 5.
Overbreadth and Prior Restraint
¶18 Article I, section 5 of the Washington State Constitution provides that “[e]very person may freely speak, write and publish on all subjects, being responsible for the abuse of that right.” The plaintiffs present an analysis of the six nonexclusive Gunwall2 factors to show that article I, section 5 is more protective of speech than the First Amendment to the United States Constitution. This analysis applies to determine whether an independent state constitutional analysis is appropriate, however, and it is already settled that article I, section 5 is subject to independent interpretation. Ino Ino, Inc. v. City of Bellevue, 132 Wn.2d 103, 115, 937 P.2d 154, 943 P.2d 1358 (1997). This does not mean that the state provision always affords greater protection than the First Amendment, however. Id. For example, no greater protection is afforded to obscenity, speech in nonpublic forums, commercial speech, and false or defamatory statements. Id. at 116 (citing State v. Reece, 110 Wn.2d 766, 778, 757 P.2d 947 (1988); City of Seattle v. Huff, 111 Wn.2d 923, 926, 767 P.2d 572 (1989); Nat’l Fed’n of Retired Persons v. Ins. Comm’r, 120 Wn.2d 101, 119, 838 P.2d 680 (1992); Richmond v. Thompson, 130 Wn.2d 368, 382, 922 P.2d 1343 (1996)).
¶19 In some contexts, however, greater protection is afforded under article I, section 5. We have recognized, for example, that when applying a time, place, and manner test to a restriction on speech in a public forum, the restriction can be imposed consistent with article I, section 5 only upon the showing of a “compelling state interest,” rather than the “substantial governmental interest” that is sufficient under *801the First Amendment. Bering v. SHARE, 106 Wn.2d 212, 234, 721 P.2d 918 (1986). In addition, unlike the First Amendment, article I, section 5 categorically prohibits prior restraints on constitutionally protected speech. Voters Educ. Comm. v. Pub. Disclosure Comm’n, 161 Wn.2d 470, 493-94, 166 P.3d 1174 (2007).
¶20 The plaintiffs say that article I, section 5 is also more protective in cases involving overbreadth, but the cases they cite do not support this conclusion. Rather, the cited cases state the principle that article I, section 5 is less tolerant than the First Amendment of overbroad restrictions if they rise to the level of a prior restraint. O’Day v. King County, 109 Wn.2d 796, 803-04, 749 P.2d 142 (1988); Ino Ino, 132 Wn.2d at 117; cf. Voters Educ. Comm., 161 Wn.2d at 494 (also cited by the plaintiffs, discussing whether challenged laws rose to the level of a prior restraint as a result of vagueness).
¶21 Moreover, although the plaintiffs assert there is greater protection under the state provision, in the broadest sense, they have not offered any explanation of why, absent a level akin to a prior restraint, overbroad provisions should be treated any differently under article I, section 5 than under the First Amendment, or what independent analysis should apply to their claim of a content-based restriction. In fact, many of the cases upon which the plaintiffs rely were decided under the First Amendment and the plaintiffs particularly urge that we follow the analysis in Mainstream Loudoun v. Board of Trustees, 2 F. Supp. 2d 783, 795 (E.D. Va. 1998) (Mainstream Loudoun I) and Mainstream Loudoun v. Board of Trustees, 24 F. Supp. 2d 552 (E.D. Va. 1998) (Mainstream Loudoun II), decided under a federal constitutional analysis. Accordingly, in deciding whether the filtering policy suffers from overbreadth under article I, section 5, our analytical approach aligns with the approach taken under the First Amendment.
¶22 The first question here is whether, as the plaintiffs claim, NCRL’s filtering policy acts as a prior restraint *802in violation of article I, section 5. A prior restraint seeks to prohibit future speech rather than to punish speech that has occurred. Voters Educ. Comm., 161 Wn.2d at 494. A prior restraint is an official restriction imposed on speech or another form of expression in advance of its occurrence. Sanders v. City of Seattle, 160 Wn.2d 198, 224, 156 P.3d 874 (2007); see Soundgarden v. Eikenberry, 123 Wn.2d 750, 764, 871 P.2d 1050 (1994).
¶23 NCRL maintains that its policy is neither a prior restraint nor its functional equivalent. Rather, it is an operational rule that applies in the same way as any other collection decision by NCRL managers.
¶24 We first note that the plaintiffs’ complaint is that they are prevented from accessing the speech of others in violation of article I, section 5. The First Amendment protects the right to receive information and ideas. Kleindienst v. Mandel, 408 U.S. 753, 762-63, 92 S. Ct. 2576, 33 L. Ed. 2d 683 (1972); see Voters Educ. Comm., 161 Wn.2d at 483 (acknowledging that under the First Amendment, free speech includes the fundamental counterpart of the right to receive information). We believe that a comparable right exists under article I, section 5.
¶25 There are very few appellate cases involving Internet filters and free speech issues, and no cases decided under article I, section 5. However, A.L.A. involved First Amendment challenges to CIPA. Among other things, the United States Supreme Court considered whether the Internet filtering required by CIPA constitutes a prior restraint. The plurality in A.L.A. termed it a mistake to extend “prior restraint to the context of public libraries’ collection decisions. A library’s decision to use filtering software is a collection decision, not a restraint on private speech.” A.L.A., 539 U.S. at 209 n.4. We similarly agree that NCRL’s filtering policy does not constitute a prior restraint within the meaning of article I, section 5.
¶26 As the plurality in A.L.A. explained, a public library selects what it will collect and make available to its patrons. “Public libraries pursue the worthy missions of *803facilitating learning and cultural enrichment.” Id. at 203. A public library “provides Internet access . . . for the same reasons it offers other library resources: to facilitate research, learning, and recreational pursuits by furnishing materials of requisite and appropriate quality.” Id. at 206. “To fulfill their traditional missions, public libraries must have broad discretion to decide what material to provide to their patrons.” Id. at 204.
¶27 This discretion is not unlimited. In Board of Education v. Pico, 457 U.S. 853, 102 S. Ct. 2799, 73 L. Ed. 2d 435 (1982) (plurality opinion), an action seeking injunctive relief was brought with regard to removal of certain books from school libraries.3 The plurality took great pains to point out that the action did “not involve the acquisition of books,” saying that “nothing in our decision today affects in any way the discretion of a local school board to choose books to add to the libraries of their schools.” Id. at 862, 871. The plurality added, however, that the “discretion may not be exercised in a narrowly partisan or political manner.” Id. at 870.
¶28 We agree with the observations made in A.L.A. and conclude that a library’s decision about what materials to make available to its patrons does not constitute a prior restraint. NCRL’s filtering policy does not prevent any speech and in particular it does not ban or attempt to ban online speech before it occurs. Rather, it is a standard for making determinations about what will be included in the collection available to NCRL’s patrons.
¶29 The plaintiffs maintain, however, that NCRL’s policy is overbroad and in fact is so overbroad that it rises to the level of a prior restraint that violates article I, section 5 because it restricts access to a substantial amount of pro*804tected speech. There are necessarily two inquiries that must be made: whether the policy suffers from overbreadth, and, if so, whether the overbreadth rises to the level of a prior restraint. As explained, only in the latter instance is article I, section 5 “less tolerant” than the First Amendment. As also explained, our article I, section 5 analysis of overbreadth follows the analysis under the First Amendment.
¶30 In general, a law is unconstitutionally over-broad if constitutionally protected free speech activities are swept within its prohibitions. State v. Johnston, 156 Wn.2d 355, 127 P.3d 707 (2006). The plaintiffs contend that an overbreadth problem results from categorizations that fail to track constitutional requirements, filtering errors, and NCRL’s policy of blocking entire web sites when a single page is deemed harmful to minors.
¶31 Initially, we agree with NCRL that the Mainstream Loudoun cases are of little value in light of the Court’s decision in A.L.A., contrary to the plaintiffs’ heavy reliance on these cases. For example, the court in the Mainstream Loudoun cases applied a forum analysis and concluded that a library is a limited public forum, determined that strict scrutiny applies in deciding whether Internet filtering is constitutional, and concluded that the closest analogy to the decision to filter Internet content is removal of library materials rather than selection of library materials as additions to the library’s collection. Mainstream Loudoun I, 2 F. Supp. 2d at 793-94, 795; Mainstream Loudoun II, 24 F. Supp. 2d at 561-63.
¶32 However, all of these conclusions are at odds with the decision in A.L.A. A majority of the Court in A.L.A. agreed that public forum analysis is inappropriate in determining whether a library can constitutionally filter certain Internet content. A.L.A., 539 U.S. at 205-07 (plurality) (concluding that public forum analysis is not applicable to Internet access in a public library); id. at 215-16 (Breyer, J., concurring) (agreeing with plurality on this point). A ma*805jority of the Court also agreed that strict scrutiny does not apply. The plurality stated that
[a] library’s need to exercise judgment in making collection decisions depends on its traditional role in identifying suitable and worthwhile material; it is no less entitled to play that role when it collects material from the Internet than when it collects material from any other source. Most libraries already exclude pornography from their print collections because they deem it inappropriate for inclusion. We do not subject these decisions to heightened scrutiny; it would make little sense to treat libraries’ judgments to block online pornography any differently, when these judgments are made for just the same reason.
Id. at 208. In Justice Breyer’s concurrence he agreed that strict scrutiny is too rigid a test to apply in this context. Id. at 217 (Breyer, J., concurring).4
¶33 Finally, a majority of the Court acknowledged the discretion that libraries exercise when selecting material and treated filtering policies as pertaining to collection of materials, not removal of materials after once having been selected. In his concurrence, Justice Breyer observed that “libraries often properly engage in the selection of materials, either as a matter of necessity (i.e., due to the scarcity of resources) or by design (i.e., in accordance with collection development policies).” Id. (Breyer, J., concurring). Significantly, the plurality observed that it is not constitutionally relevant that when selecting books a library makes an affirmative decision to acquire them for its collection but that when filtering the Internet a library does not review every web site that it makes available. “A library’s need to exercise judgment in making collection decisions depends on its traditional role in identifying suitable and worthwhile material; it is no less entitled to play that role when it collects material from the Internet than when it collects material from any other source.” Id. at *806208. Because of the sheer quantity of material on the Internet and the rapidity with which it changes, libraries cannot possibly review the material item by item to determine what should be included and what should not. Id. The only way it could make such determinations would be to exclude “an enormous amount of valuable information that it lacks the capacity to review. Given that tradeoff, it is entirely reasonable for public libraries to reject that approach and instead exclude certain categories of content, without making individualized judgments that everything they do make available has requisite and appropriate quality.” Id.
¶34 Thus, NCRL’s filtering policy, when applied, is not comparable to removal of items from NCRL’s collection, but rather acquisition of materials to add to its collection. NCRL has made the only kind of realistic choice of materials that is possible without unduly and unnecessarily curtailing the information available to a bare trickle — or a few drops — of the vast river of information available on the Internet.
¶35 Because so much of Mainstream Loudoun is no longer sound, we find it of little assistance in addressing the certified question before us.
¶36 The foundations of the plaintiffs’ overbreadth challenge are the presumption that a public library must make accessible all constitutional speech on the Internet and the contention that a policy that applies so broadly that it excludes any constitutionally protected speech violates article I, section 5. But a public library has no obligation to make available any and all constitutionally protected material, and the goal of libraries has never, as the plurality in A.L.A. noted, been to provide “ ‘universal coverage.’ ’’A.L.A., 539 U.S. at 204 (quoting Am. Library Ass’n v. United States, 201 F. Supp. 2d 401, 421 (E.D. Pa. 2002)). Rather, “ ‘[t]he librarian’s responsibility ... is to separate out the gold from the garbage, not to preserve everything.’ ” Id. (quoting William A. Katz, Collection Development: The Selection of Materials for Libraries 6 (1980)). “ ‘It is the aim of *807the selector to give the public, not everything it wants, but the best that it will read or use to advantage.’ ” Id. (quoting Francis K.W. Drury, Book Selection xi (1930)).
¶37 The principle that a library has no obligation to provide universal coverage of all constitutionally protected speech applies to Internet access just as it does to the printed word in books, periodicals, and other material physically collected and made available to patrons. “The Internet is simply another method for making information available in a . . . library’ ” and “is ‘no more than a technological extension of the book stack.’ ” A.L.A., 539 U.S. at 207 (quoting S. Rep. No. 106-141, at ¶7 (1999)). Just as it is entitled to exercise its acknowledged discretion in amassing a collection of printed materials physically placed on the shelves in order to carry out its mission, it is entitled to exercise discretion when it comes to Internet access involving its facilities and equipment.
¶38 The discretion that public libraries enjoy in selecting materials for their collections is not merely a function of what a library can afford in terms of costs and space, contrary to the position taken in Mainstream Loudoun I, 2 F. Supp. 2d at 795. Even if one were to assume a public library with unlimited funds and space, that library would be under no obligation to make all constitutionally protected printed materials available. For example, regardless of its resources a library need not place pornographic materials on its shelves, although such materials are constitutionally protected. It need not place children’s comic books on its shelves, although these, too, are constitutionally protected. As another example, if a private collector offered a library a collection of books at an attractive set price for the entire collection and the library purchased the collection, it would not have to include all of the books in its own collection and would not have to make them all available to its patrons.
¶39 In any event, it is simply not true that there are no costs or physical restrictions attendant to access to the Internet via a public library. Although generally purchase *808of Internet access includes all of the Internet’s free sites, making the Internet accessible to patrons requires devoted library space and frequently scarce computer terminals and resources.
¶40 Given the traditional and necessary discretion lodged in public libraries with respect to acquisition of materials, we do not agree that the overbreadth doctrine applies to a public library’s decisions about what materials to place in its collections. For example, if a public library decides, in accord with its written policies, not to acquire pornography for its collection, can it be said that its policies are unconstitutionally overbroad? To the contrary, exclusion of this type of constitutionally protected speech is within the discretion that libraries traditionally enjoy. We do not believe there is any good reason to treat the material available on the Internet any differently.
¶41 In short, a library simply does not have to include all constitutionally protected materials in its collection and it follows that no overbreadth problem necessarily results under article I, section 5 as a result of a public library’s Internet filtering policy under which access to certain categories of constitutionally protected materials is denied.
¶42 Next, turning to the plaintiffs’ overbreadth claim based on filtering errors, NCRL concedes that its filter on some occasions incorrectly includes inoffensive web sites in the prohibited categories, a circumstance known as “overblocking.” This means that the filter blocks web sites that do not actually fall within the categories that the filter is intended to block. The parties make vastly different statements about the degree of overblocking. The plaintiffs claim that their expert’s study shows that the filter has an error rate of 11 and 23.6 percent. The plaintiffs’ expert determined that of 100,000 randomly selected .com domains, FortiGuard blocked 536 web pages as pornography or adult materials and 64 were blocked in error, and the expert concluded this resulted in an error rate of 11.9 percent. Of 100,000 .org domains, 207 web pages were *809blocked as pornography or adult materials and 49 were blocked in error, for an error rate of 23.6 percent.
¶43 On the other hand, NCRL’s expert conducted a study of URLs (uniform resource locators) actually visited or requested during a week in August 2007. Of 60,000 URLs, 2,180 were blocked and of these, 289 complete web pages were blocked, with 20 blocked in error; 1406 “helper images” (“little images that are parts of web pages”) were blocked, with 744 blocked in error; 194 “other images” were blocked, with 24 blocked in error; and 110 URLs were not “ratable,” i.e., the expert could not determine whether they were correctly blocked. Order at 15.
¶44 Regardless of the disparities, as the plurality in A.L.A. concluded, even if any constitutional issue is implicated by overblocking, it is “dispelled” if the material that is erroneously blocked is easily unblocked upon the request of an adult. A.L.A., 539 U.S. at 209. Like the plurality in A.L.A., we conclude under article I, section 5, that if material that is blocked when it does not fall within the categories that are supposed to be blocked may be unblocked upon request, no overbreadth problem would exist. Because there would be no unconstitutional overbreadth, it follows there would be no overbreadth rising to the level of a prior restraint.
¶45 Here, if a library patron wants to access a web site or page that has been blocked by FortiGuard, he or she may send an e-mail to NCRL administrators asking for a manual override of the block. The site or page is reviewed to ascertain whether allowing access would accord with NCRL’s mission, its policy, and CIPA requirements. If not, the request is denied. If the request is approved, access will be allowed on all of NCRL’s public access computers.
¶46 Between October 1, 2007, and February 20, 2008, NCRL received 92 requests to unblock access, of which 90 were automated. NCRL responded to 8 within an hour, to another 19 within the same day, to another 29 the next day, to another 20 within three days, and to another 5 more than three days after the request. There is no evidence about the *810remaining 11 requests. Since October 1, 2007, NCRL unblocked sites in response to 12 requests. Among other things, sites that were erroneously blocked as “Pornography,” “Gambling,” and “Malware” were unblocked upon request.
¶47 Because adults can request and obtain unblocking of erroneously blocked sites, we conclude that on this record no overbreadth problem exists under article I, section 5 as a result of overblocking.
¶48 The plaintiffs next contend that an overbreadth problem results when entire web sites are blocked rather than just the specific pages that contain material within the prohibited categories. This claim is similar to the over-blocking claim, i.e., a claim that material is blocked that should not be blocked because it does not fall within a prohibited category. It differs in that at least a part of what is on the blocked site falls within one of the categories that the filter is designed to block.
¶49 Again, the crux of the issue is NCRL’s discretion regarding what will be added to its collection. Given that a public library simply has no obligation to include all types of constitutionally protected printed material in its collection, and is not, for example, required to include a book with three pages of pornography and three hundred pages that are not pornographic, it does not have to include access to an Internet site that contains some matter falling within a prohibited category even if other matter on the site does not. We do not believe an overbreadth problem occurs under article I, section 5 when the filter blocks sites containing matter falling within one of the prohibited categories, even if other material on the site does not.
¶50 Finally, the plaintiffs contend that the filtering policy is an overbroad restriction on adult speech because, they assert, no person can access on-line material that NCRL decides is inappropriate for a child. The plaintiffs rely on Butler v. Michigan, 352 U.S. 380, 382-83, 77 S. Ct. 524, 1 L. Ed. 2d 412 (1957), where the United States Supreme Court overturned a conviction under a law criminalizing the *811distribution of literature that could have a “potentially deleterious influence upon youth.” The Court stated that the government may not “reduce the adult population ... to reading only what is fit for children.” Id. at 383. In Adams v. Hinkle, 51 Wn.2d 763, 779-80, 322 P.2d 844 (1958), our court followed Butler and invalidated a statute prohibiting the sale of comic books in part because the statute limited adults’ access to this type of speech.
¶51 Although the plaintiffs would make it appear that NCRL’s filtering policy presents the same kind of restriction as condemned in these cases, there are significant differences. Most importantly, just as a public library has discretion to make content-based decisions about which magazines and books to include in its collection, it has discretion to make decisions about Internet content. A public library can decide that it will not include pornography and other adult materials in its collection in accord with its mission and policies and, as explained, no unconstitutionality necessarily results. It can make the same choices about Internet access.
¶52 We do not believe this case presents circumstances analogous to those in Butler and Adams. Rather, it concerns a public library’s collection policies. A public library does not come readily to mind as having been a source of pornography and other adult material before the advent of the Internet (and the current dispute), and should not be forced to become one just because it makes Internet access available to its patrons. As the plurality in A.L.A. observed, “Most libraries already exclude pornography from their print collections because they deem it inappropriate for inclusion.” A.L.A., 539 U.S. at 208. It makes “little sense” to treat libraries’ decisions to block access to “online pornography any differently, when these judgments are made for just the same reason.” Id.
¶53 We conclude that no overbreadth in violation of article I, section 5 occurs as a result of NCRL’s choice to block Internet access to pornography, adult materials, and nudity/risqué materials.
*812Content-based restrictions
¶54 The plaintiffs also argue that NCRL’s filtering policy constitutes an unconstitutional content-based restriction under article I, section 5. According to the plaintiffs, any content-based restriction is presumptively invalid and ordinarily upheld only if it is meets the strict scrutiny standard of review.
¶55 Contrary to the plaintiffs’ apparent position, not all content-based standards are presumptively invalid or reviewed under a strict scrutiny standard. The plurality in A.L.A. explained that the Court held in “analogous contexts that the Government has broad discretion to make content-based judgments in deciding what private speech to make available to the public.” Id. at 204. In National Endowment for Arts v. Finley, 524 U.S. 569, 118 S. Ct. 2168, 141 L. Ed. 2d 500 (1998), the Court upheld an arts funding program requiring the National Endowment for the Arts (NEA) to make funding decisions using content-based criteria. The Court observed that “[a]ny content-based considerations that may be taken into account in the grant-making process are a consequence of the nature of arts funding.” Id. at 585. It also said that “[t]he very assumption of the NEA is that grants will be awarded according to the artistic worth of competing applicants and absolute neutrality is simply inconceivable.” Id. (internal quotation marks and cites omitted); see also Ark. Educ. Television Comm’n v. Forbes, 523 U.S. 666, 672-73, 118 S. Ct. 1633, 140 L. Ed. 2d 875 (1998) (public television’s editorial decisions regarding private speech presented to viewers). These cases demonstrate, contrary to the plaintiffs’ argument, that not all content-based distinctions must be subjected to strict scrutiny.
¶56 A public library necessarily considers content when making collection decisions and must do so to fulfill its mission; content-based considerations in selecting materials are part and parcel of the traditional role served by a public library. For this reason, the Court in A.L.A. *813declined to apply a public forum analysis to assess CIPA’s filtering requirements and declined to apply strict scrutiny. We agree that under article I, section 5 a public forum analysis does not apply in this context.
¶57 Generally, when a free speech challenge arises in regard to activity on property owned and controlled by the government, a court will engage in a “forum analysis” to determine the level of judicial scrutiny that applies. We have adopted the federal analysis for determining whether public property is a public forum, and federal case law is persuasive, though not binding. Sanders, 160 Wn.2d at 208. Internet access in a public library is not a traditional public forum. As the plurality in A.L.A. explained, this resource did not exist until recently and has not “ ‘immemorially been held in trust for the use of the public, and, time out of mind, . . . been used for purposes of assembly, communication of thoughts between citizens and discussing public questions.’ ” A.L.A., 539 U.S. at 205 (alteration in original) (quoting Int'l Soc’y for Krishna Consciousness, Inc. v. Lee, 505 U.S. 672, 679, 112 S. Ct. 2701, 120 L. Ed. 2d 541 (1992)). Traditional forum analysis does not extend beyond its historical confines. Id. at 206; Sanders, 160 Wn.2d at 209 (applying test for traditional public forum under article I, section 5).
¶58 In addition, a public forum may exist where the government makes an affirmative decision to open up its property for use as a public forum. A.L.A., 539 U.S. at 206 (citing Cornelius v. NAACP Legal Def. & Educ. Fund, Inc., 473 U.S. 788, 802, 105 S. Ct. 3429, 87 L. Ed. 2d 567 (1985)). So long as the government holds government property open to the public as a place for expressive activity, the same analysis applies as applies to a traditional public forum. Sanders, 160 Wn.2d at 210. The Court in A.L.A. concluded that Internet access in a public library is not a designated public forum because “[a] public library does not acquire Internet terminals in order to create a public forum for Web publishers to express themselves, any more than it collects books in order to provide a public forum for the authors of *814the books to speak.” A.L.A., 539 U.S. at 206. Rather than providing Internet access to encourage private speakers’ diversities of view, it offers Internet access for the same reasons that other library resources are offered: “to facilitate research, learning, and recreational pursuits by furnishing materials of requisite and appropriate quality.” Id.
¶59 The United States Court of Appeals for the Third and Sixth Circuits have held, however, that a library is a limited public forum insofar as the library must permit the public to exercise the right to receive information and ideas consistent with the nature of the library as a place for reading, writing, and quiet contemplation. See Neinast v. Bd. of Trs., 346 F.3d 585, 591 (6th Cir. 2003); Kreimer v. Bureau of Police, 958 F.2d 1242, 1259 (3d Cir. 1992). But not all aspects of a library are a limited public forum, the Sixth Circuit explained in Neinast. That court held that the high level of scrutiny applicable to a public forum does not apply to a library regulation requiring a patron to wear shoes because the regulation did not directly impact the right to receive information. Neinast, 346 F.3d at 591-92.
¶60 The premise that not all aspects of a particular government property are treated the same under a forum analysis is also exemplified by Illinois Dunesland Preservation Society v. Illinois Department of Natural Resources, 587 F. Supp. 2d 1012 (E.D. Ill. 2008), aff’d on other grounds, 584 F.3d 719 (7th Cir. 2009). There, the court held that although a state park itself was unquestionably a traditional public forum, a display rack in the park was not a public forum because it was created to facilitate the recreational pursuit of park visitors and provide useful information for them — in essence a “mini-library of resources for the public” with respect to which the department of natural resources made editorial judgments about what to include. Id. at 1019-20, 1018 n.6;5 see also Pleasant Grove City v. Summum, 555 U.S. 460, 129 S. Ct. 1125, 1137-38, 172 L. Ed. *8152d 853 (2009) (concluding that although parks are a traditional public forum, monuments placed in them are not subject to forum analysis).
¶61 The limited public forum analysis in Neinast and Kreimer relate to the patrons’ right to receive information, which is effectively equated to the right to express oneself in a public forum. But even assuming the right to receive information implicates forum analysis as the Third and Sixth Circuits concluded, and that this right exists with respect to a public library, it would still exist only with respect to the materials that are actually in a library’s collection. A patron would not have a right to receive information in a public library if that information was not part of the library’s collection. And a patron does not have the constitutional right to force a public library to acquire a particular book or type of book. Analogously, this right would not exist with respect to Internet sites that have not been added to a library’s collection. Accordingly, even under the limited public forum analysis addressed in Neinast and Kreimer, collection decisions about Internet materials are not an aspect of a public library subject to public forum analysis.
¶62 For purposes of article I, section 5, we agree with the Court in A.L.A. that Internet access in a public library — in terms of what may be offered and what may be blocked by Internet filtering — is not subject to public forum analysis and the strict scrutiny that accompanies such a classification, whether as a traditional, designated, or limited public forum.
¶63 Given the traditional and historical role of a public library, and the discretion necessarily entailed to make content-based judgments about what to include in its collection, we conclude that article I, section 5 is not violated by a public library’s Internet filtering policy if it is reasonable when measured in light of the library’s mission and policies, and is viewpoint neutral.
¶64 It appears to us that NCRL’s filtering policy is reasonable and accords with its mission and these policies *816and is viewpoint neutral. It appears that no article I, section 5 content-based violation exists in this case. NCRL’s essential mission is to promote reading and lifelong learning. As NCRL maintains, it is reasonable to impose restrictions on Internet access in order to maintain an environment that is conducive to study and contemplative thought.
¶65 NCRL points out that more than half of its branches serve as the de facto school library for local school districts. Article IX, section 1 establishes education as the State’s highest priority. While the Internet provides opportunities for educational enrichment, exposure to unfiltered Internet access on demand by adults in these branches is not suited to the education of children. NCRL has documented instances of sexually explicit content displayed on its computers and printed from them despite the FortiGuard filtering, which NCRL says can be expected to increase if the filter can be disabled upon request.
¶66 Children are not the only patrons who might be adversely affected by unlimited Internet access in the public libraries. Even adults may find such exposure ill-suited to their use and enjoyment of a public library as a place for reading and contemplative thought. As NCRL says, limited restrictions on Internet access may help to minimize circumstances that staff and other patrons, including adults, may find threatening, hostile, or disruptive.
¶67 NCRL maintains that patrons have practical alternatives when access to a particular kind of on-line content is blocked, including access to image databases through NCRL’s home page and searches using Google’s main search engine at Google.com, which is not blocked. NCRL also points out, for example, that it has unblocked casino-related sites at the request of patrons with interests other than illegal wagering.6 NCRL also points out that it has a large number of print volumes available and a mail order program that is also available for obtaining some material that may be blocked under the filtering policy.
*817¶68 The filtering policy appears to us, as NCRL contends, to be a reasonable measure that sets minimal restrictions on Internet access so that the Internet is used by all of NCRL’s patrons in a way that advances the duty of education and fulfills NCRL’s mission and traditional role.
¶69 The filtering policy is neutral in application, applying to all patrons alike. It is viewpoint neutral because it makes no distinctions based on the perspective of the speaker. See generally Members of City Council v. Taxpayers for Vincent, 466 U.S. 789, 804, 104 S. Ct. 2118, 80 L. Ed. 2d 772 (1984) (describing the viewpoint neutrality requirement as forbidding the government from regulating speech in ways that favor some viewpoints or ideas at the expense of others).
¶70 While we would conclude, on this record, that the filtering policy does not violate article I, section 5, we recognize that applying this constitutional provision according to the legal principles we delineate in this opinion to the facts of this case is a matter for the federal court.
CONCLUSION
¶71 A public library has traditionally and historically enjoyed broad discretion to select materials to add to its collection of printed materials for its patrons’ use. We conclude that the same discretion must be afforded a public library to choose what materials from millions of Internet sites it will add to its collection and make available to its patrons. A public library has never been required to include all constitutionally protected speech in its collection and has traditionally had the authority, for example, to legitimately decline to include adult-oriented material such as pornography in its collection. This same discretion continues to exist with respect to Internet materials.
¶72 The plaintiffs’ claims of overbreadth, prior restraint, and that NCRL’s Internet filtering policy is an impermissible content-based restriction all fail to account for this traditional and long-standing discretion to select what *818materials will be included in a public library’s collection. We conclude that on the factual record presented to us in the district court’s order on certification, the filtering policy suffers from none of the constitutional infirmities under article I, section 5 claimed by the plaintiffs. However, we acknowledge that the federal court will apply the legal guidelines we set forth in this opinion to the facts of the case.
¶73 In response to the question certified by the United States District Court for the Eastern District of Washington, we answer that in accord with our analysis in this opinion a public library may, consistent with article I, section 5 of the Washington State Constitution, filter Internet access for all patrons without disabling the filter to allow access to web sites containing constitutionally protected speech upon the request of an adult library patron.
C. Johnson, Alexander, Owens, and Fairhurst, JJ., concur.The defendant, North Central Regional Library District (NCRL), suggests that the question is better understood if read to mean:
Whether a public library, consistent with Article I, § 5 of the Washington Constitution, may filter Internet access for all patrons without disabling the filter to allow access to Web sites containing constitutionally-protected speech upon the request of an adult library patron.
We agree that the added language better conveys the issue in the case because NCRL has no ability (or authority) to disable the web sites themselves. Rather, the issue concerns the patrons’ access to web sites via NCRL’s computer terminals. With this clarification, we address the certified question.
State v. Gunwall, 106 Wn.2d 54, 720 P.2d 808 (1986).
The books had been characterized in a press release as “ ‘anti-American, anti-Christian, and anti-Sem[i]tic, and just plain filthy.’ ’’Pico, 457 U.S. at 857. The plurality concluded that “local school boards may not remove books from school library shelves simply because they dislike the ideas contained in those books and seek their removal to ‘prescribe what shall be orthodox.’ ” Id. at 872 (quoting W. Va. Bd. of Educ. v. Barnette, 319 U.S. 624, 642, 63 S. Ct. 1178, 87 L. Ed. 2d 1628 (1943)).
Justice Breyer would have applied a heightened level of scrutiny, but not strict scrutiny. A.L.A., 539 U.S. at 216-17 (Breyer, J., concurring).
The Seventh Circuit agreed that the government did not have to make the display rack available to exhibit any and all pamphlets that interest groups wanted to place in it. Ill. Dunesland Pres. Soc’y, 584 F.3d at 725.
NCRL says that it has declined to unblock freelotto.com, which hosts gambling, but has allowed access to oregonlotto.com, which does not.