This is an appeal from a judgment of the United States District Court for the Southern District of New York, Robert L. Carter, Judge, approving under Fed.R.Civ.P. 23(e) a settlement of an antitrust class action brought against the professional basketball league known as the National Basketball Association (NBA) and its constituent teams by a class consisting of the 479 individuals who played in the league at some point during the pendency of this action. At the time of settlement, the suit was six years old, discovery had been substantially completed, and Judge Carter had had ample opportunity to become thoroughly familiar with the evidence. His opinions on various aspects of the case are reported at 72 F.R.D. 64 (S.D.N.Y.1976); 413 F. Supp. 88 (S.D.N.Y.1976); 404 F. Supp. 832 (S.D.N.Y.1975); 67 F.R.D. 691 (S.D.N.Y.1975); and 389 F. Supp. 867 (S.D.N.Y.1975). Appellants are the only three members of the plaintiff class to object to the settlement. After a settlement hearing at which their objections were fully aired, Judge Carter exhaustively canvassed the relevant criteria1 and approved the settlement as fair, reasonable, and adequate. 72 F.R.D. 64. Appellants, while not attacking the general fairness of the settlement, have three specific objections to it. Finding all three to be meritless, we affirm.

Certification of the Class Under Fed.R.Civ.P. 23(b)(1)

Appellants' first objection is that the class was certified under Fed.R.Civ.P. 23(b)(1), rather than under Rule 23(b)(3). Certification under the latter provision would have given them the opportunity to opt out of the class as provided in Rule 23(c)(2).2 They argue that Rule 23(b)(1)(A), which requires a court to find that individual lawsuits would establish "incompatible standards of conduct" for the party opposing the class, has not been complied with here. We need not decide this question, however, because appellants do not argue the invalidity of Judge Carter's concurrent certification of the class under Rule 23(b)(1)(B).

This alternative certification requires a court to find that individual actions would "as a practical matter" impair or impede the rights of class members not before the court. The court so found, 389 F. Supp. at 901, and this finding seems ineluctable. By first preventing the merger of two competing basketball leagues, thus creating more job opportunities and, probably, keeping player salaries higher than they might otherwise have been, and then causing extensive changes in league rules to be made, this class action has furthered interests of all class members that would certainly have been impaired if individual suits, with inevitably disparate results, had been allowed. See Advisory Committee Note to Rule 23(b)(1)(B) (1966); 7A C. Wright & A. Miller, Federal Practice and Procedure § 1774 (1972).

Appellants also argue briefly that Rule 23(b)(1) cannot be used here because the action is essentially one for damages. Whatever the merits of this argument might be in a case in which only damages from past injury were sought, in the instant case the relief sought included not only damages but also equitable relief, particularly the application in the future of uniform rules and contracts to all parties concerned. In such cases, Rule 23(b)(1) certification is plainly proper. See Larionoff v. United States, 365 F. Supp. 140, 143 (D.D.C.1973), aff'd in relevant part, 533 F.2d 1167, 1181-82 n. 36 (D.C.Cir.1976), cert. granted, 429 U.S. 997, 97 S. Ct. 522, 50 L. Ed. 2d 607 (1976); Mungin v. Florida East Coast Railway, 318 F. Supp. 720 (M.D.Fla.1970), aff'd mem., 441 F.2d 728 (5th Cir.), cert. denied, 404 U.S. 897, 92 S. Ct. 203, 30 L. Ed. 2d 175 (1971).

Of course, as Judge Carter noted, 389 F. Supp. at 902-03, certification of this action under Rule 23(b)(3) would also have been appropriate. As the judge correctly concluded, however, when a class action may be certified under either (b)(1) or (b)(3), the former should be chosen when to do so will avoid the inconsistent adjudication or compromise of class interests that might otherwise occur. Walker v. City of Houston, 341 F. Supp. 1124, 1131-32 (S.D.Tex.1971); Mungin v. Florida East Coast Railway, supra, 318 F.Supp. at 730; Van Gemert v. Boeing Co., 259 F. Supp. 125, 130 (S.D.N.Y. 1966); 7A C. Wright & A. Miller, supra, § 1772, at 7. Here just such inconsistency was a consummation devoutly to be feared.

Appellants' final class action argument is that, if (b)(1) certification is appropriate, that provision is unconstitutional as applied to them because the denial of an opportunity to opt out of the class violates the due process clause of the Fifth Amendment. While the due process clause imposes definite limitations on Rule 23, those limitations concern adequacy of representation, notice, and opportunity to participate and be heard, see Hansberry v. Lee, 311 U.S. 32, 42-43, 61 S. Ct. 115, 85 L. Ed. 22 (1940); Arthur Andersen & Co. v. Ohio (In re Four Seasons Securities Laws Litigation), 502 F.2d 834, 843 (10th Cir.), cert. denied,419 U.S. 1034, 95 S. Ct. 516, 42 L. Ed. 2d 309 (1974); cf. Eisen v. Carlisle & Jacquelin, 417 U.S. 156, 94 S. Ct. 2140, 40 L. Ed. 2d 732 (1974) (notice requirements of Rule 23(c)), none of which are challenged here. When appropriate notice and opportunity have been provided, preclusion of the opt-out right in a (b)(1) settlement does not violate due process. See American Employers' Insurance Co. v. King Resources Co., 20 Fed.Rules Serv.2d 161, 163-64 (D.Colo.1975) (Arraj, C. J.); cf. In re Antibiotic Antitrust Actions, 333 F. Supp. 296, 298 (S.D.N.Y.) (Rule 23(b)(3) class suit with class members objecting to prior settlement), aff'd per curiam sub nom. Connors v. Chas. Pfizer & Co., 450 F.2d 1119 (2d Cir. 1971). See generally Developments in the Law Class Actions, 89 Harv.L.Rev. 1318, 1402-16 (1976); Comment, The Importance of Being Adequate: Due Process Requirements in Class Actions Under Federal Rule 23, 123 U.Pa.L.Rev. 1217 (1975).

On the assumption that the class was properly certified, appellants argue in the alternative that the settlement agreement cannot be approved because it perpetuates for ten years two "classic group boycotts" in violation of Section 1 of the Sherman Antitrust Act, 15 U.S.C. § 1 the " College Draft"3 and the "Compensation Rule."4 It is true that a settlement that authorizes the continuation of clearly illegal conduct cannot be approved, but a court in approving a settlement should not in effect try the case by deciding unsettled legal questions. West Virginia v. Chas. Pfizer & Co., 440 F.2d 1079, 1086 (2d Cir.), cert. denied, 404 U.S. 871, 92 S. Ct. 81, 30 L. Ed. 2d 115 (1971). Here, as in Grunin v. International House of Pancakes, 513 F.2d 114, 124 (8th Cir.), cert. denied, 423 U.S. 864, 96 S. Ct. 124, 46 L. Ed. 2d 93 (1975), "the alleged illegality of the settlement agreement is not a legal certainty." The challenged practices have not been held to be illegal per se in any previously decided case. The settlement agreement here must be looked at as a whole: it radically modified draft practices;5 it virtually eliminated option clauses;6 and it modified the compensation rule, eliminating it altogether after ten years, see note 4supra. In light of these facts, the settlement authorizes no future conduct that is clearly illegal.Separate Litigation by Appellant Chamberlain

Appellant Chamberlain has pending a separate individual action in federal court in California against the NBA for events occurring after this action was begun.7 Prosecution of this action was enjoined by Judge Carter below on March 31, 1976, while the settlement negotiations here under consideration were proceeding, "pending the disposition of (this) case." 413 F. Supp. at 91. Chamberlain argues that the district court cannot as a matter of jurisdiction or as a matter of discretion preclude his California litigation. The complete answer to his contention is that it is not properly before this court because it has not yet been litigated below. In approving this settlement, Judge Carter stated:

Determination of (Chamberlain's contention) is dependent upon the nature of the Chamberlain lawsuit and the extent to which it raises issues distinct and apart from those presented in this litigation. (Citation omitted.) Resolution of that question may require a full hearing and consideration. . . . In any event, this court will give Chamberlain a full opportunity to show that his claims are not so related, and insofar as a convincing showing to that effect is made, he will be entitled to pursue his litigation independently.

72 F.R.D. at 70.

On February 8, 1977, presumably pursuant to this statement, Chamberlain moved in the district court for an order clarifying the application to him of the judgment approving the settlement; he seeks in that motion to show that his claims are not related to those in the instant case. Chamberlain may properly raise his contention in this court only on appeal from the district court's decision on that motion.

Judgment affirmed.