delivered the opinion of the Court.
The petitioners in these causes — a corporation and some of its stockholders — seek an accounting from respondents — certain other corporations which, prior to a reorganization in 1943, were subsidiaries of the petitioning corporation. It is petitioners’ theory that respondents had unjustly enriched themselves by wrongfully appropriating a “tax loss” incurred by petitioner Western Pacific Railroad Corporation and applying it to the sole benefit of respondent Western Pacific Railroad Company.
The factual background upon which petitioners’ complaint was founded is as complicated as it is unique. For present purposes, we may pass over it. Suffice it to say that the cause of action was founded on a theory of unjust enrichment; jurisdiction of the federal courts was invoked upon the grounds of the diverse citizenship of the parties.
The District Court denied relief, and the Court of Appeals affirmed by a two-to-one vote. Petitioners then applied for a rehearing before the Court of Appeals en banc. With one dissent, the rehearing was denied; the court in its order struck the request that the rehearing be en banc. Petitioners then filed a second application protesting that the action of the two judges, who struck out the request for a rehearing en banc, was error because such a request was authorized by statute and required the attention of the full court.
*250The Court of Appeals, en banc, declined to entertain this second application. Chief Judge Denman dissented. We granted certiorari; among other things, we deemed it important to resolve the en banc questions precipitated by this litigation. 344 U. S. 809.
The issues stem from 28 U. S. C. § 46 (c). It reads:
“Cases and controversies shall be heard and determined by a court or division of not more than three judges, unless a hearing or rehearing before the court in banc is ordered by a majority of the circuit judges . of the circuit who are in active service. A court in banc shall consist of all active circuit judges of the circuit.”
It is petitioners’ claim that the Code vests in a defeated party the right to ask for a rehearing en banc; the court as a whole must act upon such a petition; thus the Court of Appeals erred in refusing to entertain the application in this case.
Obviously, the claim calls for close analysis of § 46 (c). What particular right, if any, does it give to a litigant in a Court of Appeals? To what extent is he entitled to put the merits of his cause before each member of the court in pressing his demand for a hearing or a rehearing before the entire court?
In our view, § 46 (c) is not addressed to litigants. It is addressed to the Court of Appeals. It is a grant of power. It vests in the court the power to order hearings en banc. It goes no further. It neither forbids nor requires each active member of a Court of Appeals to entertain each petition for a hearing or rehearing en banc. The court is left free to devise its own administrative machinery to provide the means whereby a majority may order such a hearing.
The statute, enacted in 1948, is but a legislative ratification of Textile Mills Securities Corp. v. Commissioner, *251314 U. S. 326 (1941) — a decision which went no further than to sustain the power of a Court of Appeals to order a hearing en banc. When the statute is cast in historical perspective, this becomes more readily apparent.
As early as 1938, the Judicial Conference of Senior Circuit Judges1 recommended that the Judicial Code be amended to make it clear that “the majority of the circuit judges may be able to provide for a court of more than three judges when in their opinion-unusual circumstances make such action advisable.” 2 The recommendation was renewed in 1939 and again in 1940.3 Thereafter, in 1941, when a conflict developed between circuits4 as to the power to sit en banc under the old Judicial Code, identical bills were introduced in both the House (H. R. 3390) and the Senate (S. 1053) to amend the Code as recommended by the Judicial Conference. The proposed amendment took the form of a proviso to § 117:
“. . . Provided, That, in a circuit where there are more than three circuit judges, the majority of the circuit judges may provide for a court of all the active and available circuit judges of the circuit to sit in banc for the hearing of particular cases, when in their opinion such action is advisable.” H. R. 3390, S. 1053, 77th Cong., 1st Sess.
*252When this legislation came up for a hearing before the Senate Judiciary Committee, Senator Danaher expressly raised the problem, “On whose motion would the court assemble en banc?” He was told that counsel might make a “suggestion,” but that “the convening of the full court would be at the initiative of the court,” and that it would not be desirable “to encourage the initiation of this suggestion by counsel.” Senator McFarland said that from looking at the provision he got the impression that “they [the court] would be the ones to do the acting.” Senator Kilgore agreed. Senator Danaher concluded that the amendment would be “impractical unless we make it clear that . . . the judges themselves decide.” 5
This bit of legislative history is significant. Congress was attempting to frame legislation which would empower a majority of circuit judges in any Court of Appeals to “provide” for hearings en banc. The problem was immediately raised: how would a court be convened en banc — would the legislation, as framed, give litigants the right to compel every judge to act on an application for a full court? The proponents of the legislation, and those who studied it, worked out this answer in their study of the problem: the determination of how the en banc power was to be exercised was to rest with the court itself — litigants should be free to suggest that a particular case was appropriate for consideration by the full court, but they should be given no right to compel all circuit judges to take formal action on the suggestion.
Subsequent history of later proposals — drafted in substantially similar language — discloses no change in purpose. The amendment to § 117 of the old Judicial Code *253passed the House, but it was never acted upon by the Senate.6 It may have died because this Court’s decision in Textile Mills intervened.
The inter-circuit conflict which brought on the proposed amendment to § 117, and which was later resolved by the decision of this Court in Textile Mills, was purely a dispute over the power to sit en banc; it never reached the problem of how en banc proceedings were to be initiated. In Lang’s Estate v. Commissioner, 97 F. 2d 867 (1938), the Ninth Circuit had held that under § 117 there was no way in which a circuit of more than three judges could provide the means to convene itself en banc. But the Third Circuit, in Textile Mills,7 reached a contrary conclusion:
. . we cannot agree with Judge Denman’s contrary conclusion in Lang’s Estate .... We conclude that this court has power to provide, as it has done by Rule 4 (1), for sessions of the court en banc, consisting of all the circuit judges of the circuit in active service.” 117 F. 2d 62, 70-71. (Emphasis supplied.)
In affirming the Third Circuit, this Court did no more than sustain that court’s exercise of the “power to provide ... for sessions of the court en banc.” There is nothing in that decision to indicate that we recognized any right in parties to have their cases passed upon by more than three circuit judges.
This was the state of the law in 1944, when the movement to revise the Judicial Code was in its early stages. At that time, Judge Maris, Chairman of the Judicial Conference Committee on the Revision of the Judicial *254Code, submitted a memorandum to the House Committee on Revision of Laws. Pointing to this Court’s decision in Textile Mills, he urged that the new Code should expressly provide “that except in cases and controversies . . . which the court by rule or special order directs to be heard by the full court, all cases and controversies brought before the court shall be heard by not more than three judges.” 8 This proposal was the genesis of the present § 46 (c).9 It was motivated by a dual purpose: to give express recognition to the doctrine of Textile Mills, while at the same time securing the tradition of three-judge courts against any further intrusion.
The first legislative draft of § 46 (c) did not differ in any material respect from its present form,10 and the provision passed through the succeeding drafts and stages of legislative development without attracting any specific comment. But we are not left unassisted when we seek to divine the legislators’ understanding of § 46 (c). We *255have the Reviser’s Notes, which are entitled to great weight.11 These comments were before Congress when it reviewed the proposed revision of the Code, and were relied upon to “explain . . . the source of the law and the changes made in the course of the codification and revision.” 12
The Reviser’s Notes tell us that their purpose was twofold: to “authorize the establishment of divisions of the court,” and to “provide for the assignment of circuit judges for hearings” en banc.13 Referring to the latter purpose, the Notes quote extensively from this Court’s opinion in *256Textile Mills.14 The language they quote is significant. It describes certain housekeeping functions of a Court of Appeals — functions which cannot be discharged by the court unless, on its own motion, it convenes itself as a body and acts as a body — such as rule making, appointing clerks and fixing the times when court shall be held. Clearly the Reviser’s Notes assimilated the power to sit en banc to the power to discharge these housekeeping functions, and it was precisely that description of the power which the revisers saw fit to use in describing to Congress what they deemed to be the nature of the power conferred by § 46 (c).
Furthermore, the Notes make it apparent that if the revisers intended to do anything more than codify Textile Mills, their concern was with preserving the “tradition” of three-judge courts against any further inroads.15 An interpretation of § 46 (c), which authorizes litigants, of right, to compel nonsitting judges to act in every case, is certainly a departure from the tradition of three-judge courts — a most controversial change which was plainly not anticipated by Textile Mills. Yet Congress’ purpose was codification, not alteration, of the *257rules pertaining to the administration of the courts. The Senate was told by its Judiciary Committee that “great care has been exercised to make no changes in the existing law which would not meet with substantially unanimous approval.”16 Similarly, Judge Maris told the House Committee on the Judiciary that the new Code “embodies a number of practical improvements in the judicial machinery of a wholly noncontroversial nature which have resulted from suggestions originating with the judges whose day to day administration of the various provisions of the Judicial Code gives them a special knowledge of these matters.”17
A first reading of § 46 (c) may well leave one with doubts. It reposes power in “a majority of active circuit judges,” and says no more. Perhaps, without further study, one might be inclined to fall back upon the general experience of our jurisprudence, and determine that the litigant is, by implication, given the right to compel the full court to determine whether it will exercise its power in a given case. But a study of the legislative background of § 46 (c) dispels such an idea and makes it quite clear that the draftsmen intended to grant the en banc power and no more; the court itself was to establish the procedure for exercise of the power.
This interpretation makes for an harmonious reading of the whole of § 46.18 In this Section, Congress speaks *258to the Courts of Appeals: the court, itself, as a body, is authorized to arrange its calendar and distribute its work among its membership; the court, itself, as a body, may designate the places where it will sit. Ordinarily, added Congress, cases are to be heard by divisions of three. But Congress went further; it left no doubt that the court, by a majority vote, could convene itself en banc to hear or rehear particular cases.
The juxtaposition of this last enactment with the others negates petitioners’ interpretation of the Act. Litigants are certainly given no special standing to partake, as of right, in the court’s decisions pertaining to arrangement of its calendar and the assignment of its cases to divisions. Just as the statute makes no provision binding the court to entertain every request that a particular case be assigned to a particular division, so it should not be construed to compel the court to entertain, en banc, motions for a hearing or rehearing en banc.
A contrary reading — one which would sustain petitioners — would obviously require a practice which might thrust unwarranted extra burdens on the court. It is difficult to believe that Congress intended to give an automatic, second appeal to each litigant in a Court of Appeals composed of more than three judges. Yet petitioners would have us hold that such a “horizontal” appeal is implicit in § 46. And, if petitioners are correct as to *259their claim that petitions for rehearing en banc must, as a matter of law, be passed upon by the full bench, the argument should apply equally to petitions requesting that the initial hearing of the case be en banc, because § 46 (c) treats “hearings” and “rehearings” with equality. But, again, there is nothing to suggest that every party in every case in every Court of Appeals may submit, as of right, a petition to every judge — a petition in the nature of a preliminary appeal — asking that the full bench examine his cause and formally rule on the question of whether it shall be heard en banc.
Accordingly, we hold that § 46 (c) does not require a Court of Appeals to do what petitioners claim should have been done in this case. The statute deals, not with rights, but with power. The manner in which that power is to be administered is left to the court itself. A majority may choose to abide by the decision of the division by entrusting the initiation of a hearing or rehearing en banc to the three judges who are selected to hear the case. On the other hand, there is nothing in § 46 (c) which requires the full bench to adhere to a rule which delegates that responsibility to the division. Because § 46 (c) is a grant of power, and nothing more, each Court of Appeals is vested with a wide latitude of discretion to decide for itself just how that power shall be exercised.19
But even if the statute grants only power plus the discretion for its exercise, that does not mark the end *260of our review of the en banc phase of this case. The en banc power, confirmed by § 46 (c), is, as we emphasized in the Textile Mills case, a necessary and useful power — indeed too useful that we should ever permit a court to ignore the possibilities of its use in cases where its use might be appropriate.20 If § 46 (c) is to achieve its fundamental purpose, certain fundamental requirements should be observed by the Courts of Appeals. In the exercise of our “general power to supervise the administration of justice in the federal courts,” 21 the responsibility lies with this Court to define these requirements and insure their observance.
It is essential, of course, that a circuit court, and the litigants who appear before it, understand the practice— *261whatever it may be — whereby the court convenes itself en banc. In promulgating the rules governing that procedure the court should recognize the full scope of its powers under § 46 (c). Consistent with the statute, the court may, as has been shown, adopt a practice whereby the majority of the full bench may determine whether there will be hearings or rehearings en banc, or they may delegate the responsibility for the initiation of the en banc power to the divisions of the court. But in recognizing the full scope of § 46 (c), the full membership of the court will be mindful, of course, that the statute commits the en banc power to the majority of active circuit judges so that a majority always retains the power to revise the procedure and withdraw whatever responsibility may have been delegated to the division. And, recognizing the value of an efficient use of the en banc power, the court should adopt such means as will enable its full membership to determine whether the court’s administration of the power is achieving the full purpose of the statute so that the court will better be able to change its en banc procedure, should it deem change advisable.
It is also essential that litigants be left free to suggest to the court, or to the division — depending upon where power of initiation resides, as determined by the active circuit judges of the court — that a particular case is appropriate for consideration by all the judges. A court may take steps to use the en banc power sparingly, but it may not take steps to curtail its use indiscriminately. Counsel are often well equipped to point up special circumstances and important implications calling for en banc consideration of the cases which they ask the court to decide.22 If, in the exercise of its discretion under *262§ 46 (c), a court denies litigants the privilege of reaching the ear of every circuit judge on the en banc question, there is still no reason to deny them access to the few circuit judges who must act initially, and perhaps decisively, on the matter for the others. Counsel’s suggestion need not require any formal action by the court; it need not be treated as a motion; it is enough if the court simply gives each litigant an opportunity to call attention to circumstances in a particular case which might warrant a rehearing en banc.23 And of course to hold that counsel are entitled to speak to the en banc question, is not to hold that the court itself is in any way deprived of the power to initiate én banc hearings sua sponte. The statute commits the power of initiation to the court; the litigants’ function must therefore be limited; but, certainly, if the en banc power is to be wisely utilized, there is no reason to deny the litigants any chance to aid the court in its effective implementation of the statute.
Finally, it is essential to recognize that the question of whether a cause should be heard en banc is an issue which should be considered separate and apart from the question of whether there should be a rehearing by the division. The three judges who decide an appeal may be satisfied as to the correctness of their decision. Yet, upon reflection, after fully hearing an appeal, they may come to believe that the case is of such significance to *263the full court that it deserves the attention of the full court.
The foregoing should make it clear that rejection of petitioners’ interpretation of § 46 (c) does not compel affirmance of all that was done below in disposing of the applications for a rehearing en banc. It should also be decided whether the en banc issue has been adequately-treated by the Court of Appeals. A review of the proceedings below convinces us that further consideration by that court is appropriate.
After the division which heard the appeal had announced its decision, petitioners asked for a rehearing en banc. A per curiam issued from the division:
“The petitions of the appellants and intervenors for a rehearing are denied. Insofar as the petitions seek a rehearing en banc, they are stricken as being without authority in law or in the rules or practice of the court. See Kronberg v. Hale, 9 Cir., 181 F. 2d 767.” 197 F. 2d, at 1012.
The striking of petitioners’ motion is certainly ambiguous. If we accord full legal significance to this order, we must conclude that the division ruled that counsel were not free to suggest, even to the division, that the case was appropriate for a rehearing en banc. Enough has already been said to show that this was error.
Indeed, if the three judges who decided the merits of this cause were of the opinion that counsel’s request was “without authority in law,” it may well be that they simply considered themselves powerless to act in any way on the en banc question. Two judges on the panel were district judges.24 One district judge dissented from the *264denial of a rehearing, and his understanding of the procedure which the Court of Appeals utilized to convene its full bench seems to differ from what was subsequently-announced by six members of the court.25 Indeed, at that time, it was by no means clear just what procedure the court followed to convene itself en banc.26
Following the second decision of the division, petitioners renewed their demand for a rehearing en banc by asking the court to reinstate their petition. Chief Judge Denman convened the active circuit judges so that the court might determine its authority in the matter, set forth its interpretation of § 46 (c) and fully advise the bar of its determination. Accordingly the court, en banc, declined to entertain petitioners’ application and proceeded to explain why. Construing § 46 (c) the court said, 197 F. 2d, at 1015:
“The statute, it will be recalled, commits to a 'court or division of not more than three judges’ the power to hear and determine the cases and controversies assigned to it. Obviously its determination of any such case or controversy is a decision of the Court of Appeals, and as such is a final decision, subject to review only as prescribed by 28 U. S. C. A. § 1254. Circuit judges other than those designated *265to sit on such court or division are not members of it, and officially they play, and are entitled to play, no part in its deliberations at any stage. That this is so is made clear by subdivision (a) of § 46 . . . providing that ‘Circuit judges shall sit on the court and its divisions in such order and at such times as the court directs.’ If regard be had for this mandate circuit judges may not intrude themselves, or be compelled on petition of a losing party to intrude, upon a court or division on which they have not by order of the court been directed to sit.
“A petition for rehearing in any such case, whatever its form or wording, must necessarily be treated as addressed to and is solely for disposition by the court or division to which the case was assigned for determination. . . . From this time forward petitions, if any, for rehearing in banc in cases determined by divisions of three judges will be considered and disposed of by the latter as ordinary petitions for rehearing.”
This language suggests that the full bench has refused completely to consider the merits of the en banc request. Instead, the court ruled that, “from this time forward,” the division, alone, is entrusted with that-responsibility. Yet there is nothing to show that this procedure, which the full bench said was to govern henceforth, had been followed by the division in this case. On the contrary, as has been shown, the division in this case apparently acted on the theory that it was “without authority in law” to consider the en banc request.
This language also suggests that the court thought that it had no discretion in administering the en banc power, that § 46 (c) “necessarily” limited consideration of the question of whether there should be a hearing en banc to the division. Perhaps other language in the *266opinion 27 negates the inference that the full court ruled as it did because it believed the statute required that result and permitted no alternative practice. But, at the very least, we are left in doubt. Certainly Chief Judge Denman, who dissented vigorously, thought that the court’s ruling came as a matter of statutory compulsion. And of course if it did, it rests on an erroneous interpretation of § 46 (c).
We have, then, a record which seems to tell us that the division of the Court of Appeals, which decided the merits of this difficult and complicated litigation, turned a deaf ear to counsel’s request for a full bench — quite *267conceivably on the theory that the division lacked the power to act. Likewise the full bench refused to countenance the request, saying that the initial responsibility “necessarily” lay with the division alone — although the division may have been unaware of that responsibility. Possibly acting under a misconception of the breadth of its powers, the full bench has promulgated rules for the hearing of cases en banc, and if the court has misconceived its powers perhaps it may now wish to adopt some other practice to administer § 46 (c).
The statute which we have construed is not without ambiguity; perhaps that difficulty is now resolved. The action of the court below is also not without ambiguity, for the court announced a practice which, “from this time forward,” was to govern the ordering of rehearings en banc, but that practice was not followed in this case; neither the full bench nor the division — whose decision was to govern henceforth — gave any independent consideration to the merits of the en banc issue in this case.
Accordingly, we vacate the order of the division denying petitioners a rehearing and vacate the order of the full court denying petitioners leave to file a motion to reinstate their petition for rehearing en banc; we remand the case to the Court of Appeals for further proceedings. We hold that the statute is simply a grant of power to order hearings and rehearings en banc and to establish the procedure governing the exercise of that power. We hold that litigants are given no statutory right to compel each member of the court to give formal consideration to an application for a rehearing en banc. We hold that the statute does not compel the court to adopt any particular procedure governing the exercise of the power; but whatever the procedure which is adopted, it should be clearly explained, so that the members of the court and litigants in the court may become thoroughly familiar with it; and fur*268ther, whatever the procedure which is adopted, it should not prevent a litigant from suggesting to those judges who, under the procedure established by the court, have the responsibility of initiating a rehearing en banc, that his case is an appropriate one for the exercise of the power. On remand, and in light of our interpretation of the statute and the basic requirements necessary for its efficient administration, the court should determine and clearly set forth the particular procedure it will follow, henceforth, in exercising its en banc power. If the court chooses to abide by a procedure which entrusts the initiation of rehearings en banc to the division, then the court should give an opportunity to the division for appropriate consideration of that question in this case.
Now the Judicial Conference of the United States.
Annual Report of the Attorney General (1938) p. 23. For a full treatment of statutory difficulties which gave rise to some doubts as to the power to sit en banc, see Textile Mills Securities Corp. v. Commissioner, 314 U. S. 326, 328-330.
Annual Report of the Attorney General (1939) pp. 15, 16. Report of the Judicial Conference of Senior Circuit Judges (1940) p. 7.
Lang’s Estate v. Commissioner, 97 F. 2d 867 (C. A. 9th Cir. 1938); Commissioner v. Textile Mills Securities Corp., 117 F. 2d 62 (C. A. 3d Cir. 1940), discussed in text infra.
The full text of this discussion is found in the Hearings before a Subcommittee of the Senate Committee on the Judiciary on S. 1053, 77th Cong., 1st Sess.
87 Cong. Rec. 8117. See H. R. Rep. No. 1246, 77th Cong., 1st Sess. Much of this legislative history is set out in footnote 14 of Mr. Justice Douglas’ opinion for the Court in Textile Mills.
Supra, note 4.
Memorandum of August 18, 1944, submitted to the Committee on Revision of Laws on August 21, 1944. (Emphasis supplied.) See note 9, infra.
Revision of Federal Judicial Code, Preliminary Draft [of H. R. 3498, 79th Cong., 1st Sess.], Committee Print (1945), p. 11. The Reviser’s Notes to § 46 (c) in this preliminary draft contained the following: “Such subsection (c) is based on recommendations of Circuit Judge Albert B. Maris of the third circuit in his memorandum dated August 18, 1944, and submitted to the Committee on Revision of the Laws on August 21, 1944.”
H. R. 3498, 79th Cong., 1st Sess. §46 (c) read:
“(c) In each circuit cases shall be heard and determined by a court or division of not more than three judges unless a hearing or rehearing before the court in banc is ordered by a majority of the circuit judges of the circuit who are in active service. A court in banc shall consist of all active circuit judges present and available in the circuit.”
The section came into its present form in the next draft, H. R. 7124, 79th Cong., 2d Sess. § 46 (c).
Ex parte Collett, 337 U. S. 55, 68-71 (1949).
S. Rep. No. 1559, 80th Cong., 2d Sess., p. 2.
The full text of the Reviser’s Note (6 U. S. Cong. Serv. ’48, pp. 1707-1708) reads:
“Based in part on title 28, U. S. C., 1940 ed., § 212 (Mar. 3, 1911, ch. 231, § 117, 36 Stat. 1131).
“Subsections (a)-(c) authorize the establishment of divisions of the court and provide for the assignment of circuit judges for hearings and rehearings in banc.
“The Supreme Court of the United States has ruled that, notwithstanding the three-judge provision of section 212 of title 28, U. S. C., 1940 ed., a court of appeals might lawfully consist of a greater number of judges, and that the five active circuit judges of the third circuit might sit in banc for the determination of an appeal. (See Textile Mills Securities Corporation v. Commissioner of Internal Revenue, 1941, 62 S. Ct. 272, 314 U. S. 326, 86 L. Ed. 249.)
“The Supreme Court in upholding the unanimous view of the five judges as to their right to sit in banc, notwithstanding the contrary opinion in Langs Estate v. Commissioner of Internal Revenue, 1938, 97 F. 2d 867, said in the Textile Mills case: ‘There are numerous functions of the court, as a “court of record, with appellate jurisdiction”, other than hearing and deciding appeals. Under the Judicial Code these embrace: prescribing the form of writs and other process and the form and style of its seal (28 U. S. C., § 219); the making of rules and regulations (28 U. S. C., § 219); the appointment of a clerk (28 U. S. C., § 221) and the approval of the appointment and removal of deputy clerks (28 U. S. C., § 222); and the fixing of the “times” when court shall be held (28 U. S. C., § 223). Furthermore, *256those various sections of the Judicial Code provide that each of these functions shall be performed by the court.’
“This section preserves the interpretation established by the Textile Mills case but provides in subsection (c) that cases shall be heard by a court of not more than three judges unless the court has provided for hearing in bane. This provision continues the tradition of a three-judge appellate court and makes the decision of a division, the decision of the court, unless rehearing in banc is ordered. It makes judges available for other assignments, and permits a rotation of judges in such manner as to give to each a maximum of time for the preparation of opinions.
“Whether divisions should sit simultaneously at the same or different places in the circuit is a matter for each court to determine.”
314 U. S., at 332.
See the next to final paragraph quoted in note 13, supra.
S. Rep. No. 1559, 80th Cong., 2d Sess., p. 2. (Emphasis supplied.)
Hearings before Subcommittee No. 1 of the Committee on the Judiciary of the House of Representatives on H. R. 1600 and H. R. 2055, 80th Cong., 1st Sess. 19. (Emphasis supplied.)
The full text of 28 U. S. C. § 46 reads:
"Assignment of judges; divisions; hearings; quorum.
“(a) Circuit judges shall sit on the court and its divisions in such order and at such times as the court directs.
“(b) In each circuit the court may authorize the hearing and determination of cases and controversies by separate divisions, each *258consisting of three judges. Such divisions shall sit at the times and places and hear the cases and controversies assigned as the court directs.
“(c) Cases and controversies shall be heard and determined by a court or division of not more than three judges, unless a hearing or rehearing before the court in banc is ordered by a majority of the circuit judges of the circuit who are in active service. A court in banc shall consist of all active circuit judges of the circuit.
“(d) A majority of the number of judges authorized to constitute a court or division thereof, as provided in paragraph (c), shall constitute a quorum.”
Having wide discretion the court may provide that the power may be called into play by any procedure convenient to the court. The statute simply provides that “a majority of the circuit judges of the circuit who are in active service” may order the hearing or rehearing en banc. This should not compel the full court to assemble, formally, en banc, to issue an order convening the full court. A more informal procedure may be used; such an order may be issued by the Chief Judge through the individual action of the necessary circuit judges without the necessity of convening the full court.
See 314 U. S., at 334-336. For further discussion on the utility and importance of permitting courts of appeals to sit en banc, reflecting the purpose behind §46 (c), see H. R. Rep. No. 1246, 77th Cong., 1st Sess.; Hearings before a Subcommittee of the Senate Committee on the Judiciary on S. 1053, 77th Cong., 1st Sess., pp. 39-40. See also Annual Report of the Attorney General (1939) pp. 15, 16; Report of the Judicial Conference of Senior Circuit Judges (1940) p. 7. That this Court has deemed the en banc power to be an important and useful device in the administration of justice in the courts of appeals is apparent from our action in United States ex rel. Robinson v. Johnston, 316 U. S. 649 (1942), and Civil Aeronautics Board v. American Air Transport, Inc., 344 U. S. 4 (1952). In the Robinson case, supra, where it appeared that a “conflict of views” had arisen “among the judges of the Ninth Circuit,” we remanded the case “for further proceedings, including leave to petitioner to apply for a hearing before the court en banc.” 316 U. S. 649, 650. In the American Air Transport case, supra, where the division of the Court of Appeals “were unable to agree on a disposition of the case,” we said, after dismissing the certificate: “Perhaps the Court of Appeals may now wish to hear this case en banc to resolve the deadlock indicated in the certificate and give full review to the entire case.” 344 U. S., at 5.
See United States v. National City Lines, 334 U. S. 573, 589 (1948).
Cf. United States ex rel. Robinson v. Johnston, 316 U. S. 649 (1942); Civil Aeronautics Board v. American Air Transport, Inc., 344 U. S. 4 (1952).
Similarly, to hold that counsel can “suggest” that the court exercise its en banc power is not to hold that counsel are entitled, as of right, to petition the full court to order that the initial hearing of a case be en banc. Suggestions filed with the court prior to the assignment of a case to a division or prior to the hearing before a division should not necessarily require special advance consideration by the court. They may be considered whenever the court or division deems it appropriate to consider them, and no formal action need be taken upon the suggestion.
That a Court of Appeals may be so constituted is, of course, clear. See 28 U. S. C. § 292 (a). And we do not mean to imply that the division which heard the merits of the appeal was any less a division of the Court of Appeals than would have been a division of three circuit judges.
The dissenting judge wrote, 197 F. 2d, at 1013:
“I therefore suggest to the Court of Appeals a rehearing en banc of all the Circuit Judges. For this there is precedent in this Circuit. The practice, as I understand it, substantially accords with that of the Third Circuit, which is admirable. Inasmuch as this might be the court of last resort in this case, it seems fairer to have the issues disposed of by Circuit Judges.”
Compare Crutchfield v. United States, 142 F. 2d 170, 178, note 3, (1943); Independence Lead Mines Co. v. Kingsbury, 175 F. 2d 983, 992 (1949); and Kronberg v. Hale, 181 F. 2d 767 (1950). See 63 Harv. L. Rev. 1449 (1950).
Thus the Court wrote:
"On these considerations and in harmony with its understanding of the statutory scheme, the court has consistently retained to itself as a matter of administrative and intramural concern only the problem whether or not any given case should be heard or reheard in banc. Accordingly, in the exercise of its uncontrolled discretion the court has declined altogether to entertain petitions of litigants for such hearings. The position it takes is that, apart from the possible disqualification of a judge, the composition of the court to which a case may be assigned for determination is a matter wholly outside the province of the parties.” 197 F. 2d, at 1016.
In Bradley Mining Co. v. Boice, 198 F. 2d 790 (C. A. 9th Cir. 1952), Judge Pope dissenting from the denial of a petition for a rehearing en banc wrote:
“. . . I do not think the statute intended that I, not a member of the division which heard the Western Pacific case, should have to read all the record in that case, as I might well find necessary in order to vote intelligently upon the petition.
“There is language in subdivision (c) of § 46 of Title 28 which would seem to grant to a majority of the circuit judges of the circuit the right to order a hearing or rehearing in bank in any case, a procedure which I am of course not proposing here. That is a question which was not determined by the majority opinion in the Western Pacific case, although Judge Denman seems to think that it was. Upon that question I reserve judgment until such time as determination becomes necessary.” 198 F. 2d, at 792, note 2.