Full opinion text
JON O. NEWMAN, Circuit Judge: This appeal challenges significant rulings made jointly by a district judge and a bankruptcy judge in an effort to restructure the mechanism for distributing compensation to thousands of persons claiming asbestos-related injuries from products manufactured by the Johns-Manville Corporation. The rulings are presented for review on appeal from a judgment jointly entered on August 21, 1991, by the District Courts of the Eastern and Southern Districts of New York and the Bankruptcy Court of the Southern District of New York (Jack B. Weinstein, District Judge, and Burton R. Lifland, Chief Bankruptcy Judge) approving the settlement of a class action. Some indication of the scope of the rulings is revealed by the fact that the principal opinion explaining them consumes 525 typescript pages — 201 printed pages of the Bankruptcy Reporter, supplemented by 68 pages of appendices. See In re Joint Eastern & Southern District Asbestos Litigation (“Asbestos Litigation II”), 129 B.R. 710 (E. & S.D.N.Y., Bankr.S.D.N.Y.1991). The dimensions of the controversy are indicated by the polar characterizations of the contending sides on this appeal. For the principal appellants, the proceedings giving rise to the challenged rulings are “unique in jurisprudential history, if not bizarre,” Joint Brief for Appellants at 3, “frightening,” id. at 101, and “grossly” beyond “the bounds of judicial power,” id. The appellees consider the rulings to be simply the valid settlement of a class action within the jurisdiction of the District Court, accomplished to enhance the fairness of the ultimate distribution of compensation to asbestos victims. We conclude that the judgment approving the settlement must be vacated because, to the extent that the judgment rests on diversity jurisdiction, the use of a mandatory non-opt-out class action without proper subclasses violates the requirements of Rule 23 of the Federal Rules of Civil Procedure, and, to the extent that the judgment rests on bankruptcy jurisdiction, it represents an impermissible modification of a confirmed and substantially consummated plan of reorganization in violation of section 1127(b) of the Bankruptcy Code. BACKGROUND A. The Manville Reorganization. The current controversy arises in the aftermath of the confirmation of a plan of reorganization of the Johns-Manville Corporation (“the Debtor”) the world’s largest manufacturer of asbestos. Facing claims from current and future victims of asbestos-related deaths and injuries estimated to total $2 billion, the Debtor filed a voluntary petition in bankruptcy under Chapter 11 on August 26, 1982. The reorganization proceeding involved both “present claimants,” i.e., persons who, prior to the petition date, had been exposed to Manville asbestos and had developed an asbestos-related disease, and “future claimants,” i.e., persons who had been exposed to Manville asbestos pri- or to the petition date but had not shown any signs of disease at that time. The Bankruptcy Court appointed a legal guardian to represent the interests of the future claimants. After four years of negotiation, a Second Amended Plan of Reorganization (“the Plan”) was presented to the Bankruptcy Court, see Manville Corp. v. Equity Security Holders Committee (In re Johns-Manville Corp.), 66 B.R. 517, 518-33 (Bankr.S.D.N.Y.1986), and confirmed in 1986, In re Johns-Manville Corp., 68 B.R. 618 (Bankr.S.D.N.Y.1986). The cornerstone of the Plan was the Manville Personal Injury Settlement Trust (“the Trust” or “the PI Trust”), a mechanism designed to satisfy the claims of all asbestos health claimants, both present and future. The Trust was to be funded from several sources: the proceeds of the Debtor’s settlements with its insurers; certain cash, receivables, and stock of the reorganized Manville Corporation (“Manville”); long term notes; and the right to receive up to 20 percent of Manville’s yearly profits for as long as it might take to satisfy all asbestos disease claims. As a condition precedent to confirmation of the Plan, the Bankruptcy Court issued an injunction channeling to the Trust all asbestos-related personal injury claims against the Debtor (“the Injunction”). The Injunction specifies that asbestos health claimants may proceed only against the Trust to satisfy their claims against the Debtor and may not sue Manville, its related operating entities, or its insurers. The Injunction applies to all health claimants, both present and future, regardless of whether they technically have dischargeable “claims” under the Code. Those with present claims unquestionably have dis-chargeable “claims” within the meaning of 11 U.S.C. § 101(4) (1988) and hold what the Plan categorizes as “AH Claims”; holders of AH Claims are Class-4 unsecured creditors under the Plan. If future claimants are ultimately determined to hold “claims” within the meaning of section 101(4), they too will be Class-4 unsecured creditors. If it is determined that they do not hold “claims,” they will then fall within a category denominated by the Plan as “Other Asbestos Obligations.” Whether or not the future claimants have creditor status under the Plan, they are nevertheless treated identically to the present claimants, at least to the extent of being obliged to look to the Trust as the sole source of compensation. All health claimants are required to attempt settlement with the Trust. If a settlement cannot be reached, the claimant may elect mediation, binding arbitration, or traditional tort litigation in state or federal court, including trial by jury. The claimant may collect from the Trust the full amount of whatever compensatory damages are awarded. The only restriction on recovery is that punitive damages are prohibited. Exhibit C to the Plan is the Manville Personal Injury Settlement Trust Agreement (“the Trust Agreement” or “the PI Trust Agreement”). The Trust Agreement contains Annex B, establishing Claims Resolution Procedures. A significant provision of Annex B, pertinent to one of the major issues raised on this appeal, specifies that claims will be processed “in order of initial filing, whether in a court or with the MSV [the Manville Settlement Vehicle, the mechanism established to attempt settlement of individual claims], whichever is earlier, on a first-in-first-out basis except that claims which have been settled with all defendants except defendants which are petitioners in these bankruptcy proceedings may be negotiated separately on a first-in-first-out basis with representatives of the MSV.” Trust Agreement, Annex B, § I.A.2. Challenges to the confirmation of the Plan were rejected by this Court, at least those challenges that the appellants had standing to bring. See Kane v. Johns-Manville Corp., 843 F.2d 636 (2d Cir.1988). Pursuant to the Plan, the Trust received $909 million in cash, two bonds with an aggregate value of $1.8 billion, 24 million shares of Manville common stock, and 7.2 million shares of Manville convertible preferred stock, aggregating 80 percent of the stock of the reorganized Manville. See In re Joint Eastern & Southern District Asbestos Litigation (“Asbestos Litigation I”), 120 B.R. 648, 652 (E. & S.D.N.Y., Bankr.S.D.N.Y.1990). Despite this funding, it soon became apparent that the liquidation of the claims of thousands of asbestos victims was substantially depleting the Trust’s cash. By March 30,1990, the Trust had received more than 150,000 claims, 50 percent above the highest number estimated when the Plan was approved. Id. The Trust settled 22,386 of those claims at an average liquidated value of $42,000. Id. By the spring of 1990, “the Trust was effectively out of money to pay its current and short term obligations.” Id. B. The Evolution of the Trust Restructuring. Inevitably, the financial plight of the Trust came to the attention of trial judges in the Eastern and Southern Districts of New York, who were struggling to cope with the mounting flood of asbestos cases. On June 1, 1990, Judge Weinstein of the Eastern District and Justice Freedman of the New York Supreme Court, who had been jointly endeavoring to settle a number of federal and state court asbestos cases pertaining to the Brooklyn Navy Yard, issued a joint order sua sponte. The order did not require anything, but contained several suggestions. One paragraph noted both the financial plight of the Trust and a suggestion that Manville should advance between 200 and 300 million dollars to the Trust. Another paragraph noted a need to restrict payments and urged that the Plan should be amended to permit inquiry into attorney’s fees and that the Trust should consider amending its “Payment Program” to provide for installment payments and to reject the FIFO order of payments, with payments scheduled instead based on fixed criteria such as disease, age, and availability of funds. On July 9, 1991, Judge Weinstein issued a further order, sua sponte. This Order contained several provisions. First, under the heading “Directions to Leon Silverman, Advisor to Bankruptcy Judge,” it pointed out the need to restructure the Trust and noted that Judge Lifland had given Silver-man until August 6 “to arrange the restructuring outlined.” Second, explicitly exercising authority as a district judge of the Southern District pursuant to an assignment by the Chief Judge of the Circuit, dated January 23, 1990, Judge Weinstein issued a partial stay of payments by the Trust, staying until August 6, 1990, payments of judgments, settlements, and legal fees. Third, the Order stated that the circumstances “appear to warrant a non-opt-out class under Rule 23(b)(1)(B),” which would “provide substantial benefit to those injured, the economy and the courts.” Judge Weinstein stated that he would not “today mandate such a step,” but urged all those involved to make recommendations for “a Rule 23(b)(1)(B) global settlement” and warned, “Failure to do so will leave this Court no alternative but to consider other available options.” On July 20, 1990, Judge Weinstein was granted supervisory responsibility over the Plan, pursuant to a designation by the Circuit Chief Judge and an assignment order by the Chief Judge of the Southern District. See Asbestos Litigation II, 129 B.R. at 762. In effect, what had occurred was a partial removal of the Chapter 11 proceeding from the Bankruptcy Court to the District Court under 28 U.S.C. § 157(d) (1988) (district court may, on its own motion, withdraw, in whole or in part, any proceeding referred under section 157 to bankruptcy judge). On September 18, 1990, Judge Weinstein appointed Marvin E. Frankel, Esq., as a special master to hold hearings and to report on two questions: (1) whether the financial assets of the Trust were so limited as to create a substantial risk that payments for present and future claimants would be in jeopardy, and (2) whether there was a substantial probability that payment of damage awards would exhaust the Trust’s available and projected assets. See Asbestos Litigation II, 129 B.R. at 764-65. This appointment was made in response to a motion by the Trust for a determination that its assets constituted a limited fund within the meaning of Rule 23(b)(1)(B). See id. at 764. The Special Master’s report, submitted November 3, 1990, concluded that the Trust was “deeply insolvent.” Asbestos Litigation I, App. C, 120 B.R. at 668. The Special Master estimated that the Trust’s assets had a value between $2.1 and $2.7 billion, that current and future claims were estimated at $6.5 billion, and that the Trust currently lacked the cash to pay the then liquidated total of $448.5 million in claims. Id. at 667-68. There then ensued a negotiation among lawyers representing present claimants, future claimants, the Trust, asbestos manufacturers who were co-defendants of the Trust in pending lawsuits, and Manville. The negotiations resulted in a proposal, agreed to by lawyers representing many of the interested parties but not all of the claimants, for paying present and future claimants. The proposal called for a revised Trust Distribution Process, which we outline below. With the proposed revision widely though not universally agreed to, the restructuring was accomplished by means of the filing and rapid settlement of a class action. C. The Class Action. On Nov. 19, 1990, five plaintiffs with claims against the Trust for death or injury caused by exposure to asbestos filed a class action complaint on behalf of all beneficiaries of the Trust against the trustees of the Trust and simultaneously filed a proposed Stipulation of Settlement of the class action. The judgment approving the settlement is the subject of the pending appeal. The complaint, styled Findley [et al.Jv. Blinken[et al.J was captioned as filed both in In re Joint Eastern and Southern District Asbestos Litigation, pending in the Eastern and Southern Districts, and in In re Johns-Manville Corp., the Chapter 11 proceeding pending in the Bankruptcy Court of the Southern District. The complaint was filed on behalf of the named plaintiffs and “all others similarly situated as Beneficiaries of the Trust____ Each Class member has or will have a claim either for death or personal injury caused by exposure to asbestos, or a claim for warranty, guarantee, indemnification or contribution arising from an obligation of the Trust for the payment of a Trust death or personal injury claim.” Complaint, ¶ 9. The complaint invoked both diversity jurisdiction and bankruptcy jurisdiction. Diversity jurisdiction was based on allegations that diversity of citizenship existed between the named plaintiffs, on the one hand, and the defendant Trustees, on the other, and the matter in controversy exceeded $50,000. See 28 U.S.C. § 1332 (1988 & Supp. II 1990). Bankruptcy jurisdiction was based on the allegation that the action was “related” to the Manville reorganization proceeding, over which the Court had retained jurisdiction. Complaint, If 5. The complaint alleged a single count “Seeking to Establish An Equitable Distribution of the Trust Res.” Id. at 7. It alleged that the Trust is required to pay all claims in full shortly after claims are liquidated, that the assets of the Trust are insufficient to permit such payment without jeopardizing the payment of the claims of other beneficiaries, that “[ejquitable principles of trust law and other applicable law require that the Court determine an equitable allocation of the Trust res among its Beneficiaries and a restructuring of the Trust’s procedures for payment to its Beneficiaries,” id. ¶ 21, that 70,000 actions are currently pending against the Trust, id. If 22, and that continued prosecution of these actions will defeat the purposes of the Trust by depleting the Trust res, id. As relief, the complaint sought a judgment determining an equitable allocation of the Trust res among all beneficiaries, determining the “relative rights and priorities” of all beneficiaries, determining an equitable, efficient, and inexpensive method for fixing the amount each beneficiary is entitled to receive and for distribution of Trust assets, and “enjoining permanently all pending and future proceedings by Beneficiaries against the Trust in all state and federal courts except in accordance with the procedures determined hereby.” Id. at 9. On the day the complaint was filed, District Judge Weinstein and Bankruptcy Judge Lifland (hereafter “the Trial Courts”) jointly entered orders to show cause why orders should not be entered (a) conditionally certifying the class, (b) appointing a legal representative for beneficiaries of the Trust who have not yet asserted asbestos claims, and (c) staying all proceedings against the Trust pending determination of the class action. A hearing was scheduled for November 23, four days after the complaint was filed (and the day after Thanksgiving). On November 23, after hearing oral argument, the Trial Courts entered orders (1) conditionally certifying the class and appointing representative counsel, Asbestos Litigation I, App. D, 120 B.R. at 681, (2) setting fairness hearings in four cities and approving a form of notice, id., App. E, 120 B.R. at 683, (3) staying payments by the Trust, id, App. F, 120 B.R. at 687, (4) staying proceedings against the Trust, id, App. G, 120 B.R. at 688, (5) making exceptions to the order staying proceedings, id, App. H, 120 B.R. at 689, and (6) appointing counsel as representatives for defendants, other than the Trust, in pending asbestos litigation, id, App. I, 120 B.R. at 691. Copies of the foregoing orders were mailed to counsel for each known claimant and each co-defendant and to approximately 1,500 pro se claimants. Asbestos Litigation II, 129 B.R. at 774. Copies were also distributed to all courts in which the Trust was a party to litigation, and to various other interested persons. Id. Notice of the proposed settlement was published in 11 major newspapers. Id. at 775. Hearings on the fairness of the proposed settlement were conducted in four cities. The hearings, conducted over eight days, received evidence from proponents of the settlement and objectors. Thirty-seven witnesses and attorneys were heard. On February 13, 1991, the Trial Courts issued an Order and Partial Judgment, certifying a mandatory non-opt-out class under Rule 23(b)(1)(B). Id. at 776. At that time a motion by a member of the class to opt out was denied. On June 27, 1991, the Trial Courts filed an Amended Memorandum, Order, and Final Judgment, id. at 710-911, after affording the parties an opportunity to comment on an earlier version, see id. at 734. The judgment (1) approves the settlement, (2) makes permanent the prior stay of proceedings against the Trust, and (3) reaffirms the prior injunction, issued in the Chapter 11 proceeding, restricting suits against the Manville Corporation. Id. at 911. D. The Settlement. The settlement, set out in Asbestos Litigation I, App. C, 120 B.R. at 668 (hereafter “Settlement” with page citations to Asbestos Litigation I, 120 B.R. at 669), contains numerous provisions. First, it specifies that it is binding on the class that consists of all beneficiaries of the Trust who now have or in the future may have (a) any unliquidated claims for death or injury resulting from exposure to Manville asbestos, (b) any warranty, guarantee, indemnification, or contribution claims against the Trust arising from exposure to asbestos by any class member, and (c) settlements or judgments arising from any of the foregoing claims. Settlement H 2, 120 B.R. at 669. Trust beneficiaries include those with death or personal injury claims arising from exposure to Manville asbestos prior to the confirmation date. See Plan, Exhibit A (definitions of “Beneficiary,” “Trust Claim,” “Trust Liabilities,” and “AH Claims”). Second, and a source of major dispute on this appeal, the Settlement establishes a Trust Distribution Process (“TDP”), and specifies that Trust payments will be made only in compliance with the TDP. Settlement 11 8,120 B.R. at 669. The objective of the TDP is stated to be “to treat all claimants alike by paying all claimants an equal percentage of their claims’ values over time.” Id., Exhibit A, 11 A, 120 B.R. at 670. The TDP divides all asbestos disease claims into two levels. The most seriously injured claimants are placed in Level One; these include all claims for asbestos-related cancers, all claims “of a sufficient severity to justify treatment with cancer cases,” and claims for death substantially caused by asbestos-related disease. Id. at 670-71. All other health claimants are placed in Level Two. The TDP makes three distinctions in the payment of Level One and Level Two claims: —First, the TDP establishes maximum payments for various disease conditions, and sets the máximums for Level One claims substantially higher than for Level Two claims. For Level One claims, the máximums are $350,000 for mesothelioma, $300,000 for lung cancer occurring in nonsmokers and for non-malignant diseases, $150,000 for lung cancer occurring in smokers, and $75,000 for all cancers other than mesothelioma or lung cancer. For Level Two claims, the máximums are $75,-000 for asbestosis and $30,000 for pleural disease. Id. at 680. Exceptions to the máximums may be made for “truly extraordinary situations.” Id. at 680. —Second, the TDP provides for faster payment for Level One claims. Level One claims will begin to receive payments in the first two years of the TDP. Level Two claims will begin to receive payments in the third year of the TDP. Claimants in Level One will initially be paid up to 45 percent of their claims (depending on the price at which the Trust sells its Manville stock) and then stop receiving payment until all other claimants have received 45 percent of their claims; thereafter, payments will be made to all claimants on a pro rata basis, as funds are available, until the full liquidated value of all claims has been paid. Id. at 670. —Third, the TDP creates a risk that Level Two claimants will receive a smaller percentage of their claims than Level One claimants. This risk arises from a combination of the delayed payment schedule for Level Two claims and the possibility that the present and future assets available to pay claims will be insufficient to pay all claims in full. The Trial Courts estimated that the shares of Manville owned by the Trust would have to reach a price of $24-$25 per share before the Trust could raise enough money to pay Level Two claimants the same 45 percent share of awards that will be paid to Level One claimants. In the period prior to the Settlement, Manville shares traded between $4 and $5 per share. Asbestos Litigation II, 129 B.R. at 862. The TDP also makes a distinction in the method of adjudication of health claims in an effort to divert claims out of the tort system (i.e., jury trial). The TDP establishes two payment pools. Claimants who accept liquidated values offered by the Trust or determined in binding or non-binding arbitration will be paid from Pool A. Claimants who opt for jury trials will be paid their judgment from Pool A only to the extent of the upper limit of the disease category established by the Trust or by non-binding arbitration, or such higher amount as may have been offered by the Trust or awarded through arbitration; the excess amount of any judgment will be collectable only from Pool B. 120 B.R. at 673-74. Payments can be made from Pool B in any one year only after all Pool A claims available for payment in that year have been fully paid, id. at 674, an outcome that the appellants contend is impossible. Third, to facilitate the restructuring of the Trust, the Settlement includes a Master Agreement between the Trust and Man-ville, requiring Manville to supply additional financing beyond the 20 percent profit-sharing called for by the Plan. Manville is to pay the Trust $280 million during the first four years and become obligated to pay a special dividend, depending on profitability, that will provide the Trust with sums up to an additional $240 million through the seventh year. See Asbestos Litigation II, 129 B.R. at 770. Refinancing of the Trust’s bonds will also occur. Id. at 771. Fourth, the Settlement includes a provision limiting the fees of lawyers for health claimants to the lesser of their contracted fee or 25 percent of any recovery. Settlement, 120 B.R. at 677. Fifth, Section H of the Settlement includes a complicated provision purporting to reduce the Trust’s litigating expenses by preventing all Trust beneficiaries from litigating their claims in state or federal courts. Id. at 676-77. Section H provides for an injunction ordering all Trust beneficiaries, including health claimants and asbestos manufacturers who are co-defendants of the Debtor in pending state and federal asbestos lawsuits, to dismiss, without prejudice, all pending cases, to be barred from filing future cases against Manville or the Trust, and to pursue their claims against the Trust only to the extent permitted by the Settlement. Section H also provides that in any litigation between beneficiaries of the Trust (health claimants and co-defendant manufacturers) all beneficiaries are enjoined from asserting or introducing evidence that the Trust is a joint and/or several tortfeasor, that the Trust is responsible for any injury, or that the Trust would have been responsible for any injury if it had been made a party. In the view of the co-defendant manufacturers, these prohibitions ban the introduction of Manville-related causation evidence at trial, establish national rules of joint and several liability and pro tanto (i.e., dollar for dollar) setoff for the Manville liability share, and ban impleader of the Trust. Such provisions, the co-defendants contend, trench on state law provisions and shift hundreds of millions of dollars of Manville asbestos liability from the Trust to the co-defendants. In approving the Settlement, the Trial Courts recognized that Section H “presents substantial risk of altering constitutional and state law rights of certain parties if read literally and expansively.” Asbestos Litigation II, 129 B.R. at 871 (emphasis added). The Trial Courts suggested that they might be entitled to impose a uniform national rule governing the contribution and related rights of co-defendants “[djrawing on the courts’ continuing bankruptcy jurisdiction.” Id. at 875-76. However, they refrained from attempting to invoke bankruptcy court jurisdiction to impose uniform tort rules, noting that the matter before them was “a class action, based primarily on diversity jurisdiction, rather than a pure bankruptcy proceeding.” Id. at 877. Instead, the Trial Courts sought to relax the rigor of Section H by “interpret[ing]” it, id. at 894, stating that “[m]uch of section H is precatory,” id. at 895. The “interpretation” permits the states “to exercise their evidence and substantive law policies to regulate the relationship between plaintiffs and codefendants so long as the method of recovery from the Trust is not affected and the Trust is not required to participate in any way in any litigation.” Id. at 894. More specifically, states are authorized to “apply state policy and law to control set-off and contribution in contravention of the terms of section H,” id. at 899, and state and federal courts are authorized to “admit or exclude evidence in contravention of the terms of section H,” id. at 904. The standard of Section H is not abandoned, however; rather, it is to govern state and federal court litigation “except where it violates either a fundamental public policy of New York or any other state.” Id. at 884. E. The Interim Rule 706 Order. While the Settlement was sub judice, Judge Weinstein filed an order, entered April 22, 1991, that is the subject of a pending mandamus petition and a purported interlocutory appeal. Review of the April 22 order is also sought on the appeal from the final judgment approving the class action settlement. The April 22 order arose from the following circumstances. On December 7, 1990, in anticipation of fairness hearings on the proposed settlement of the class action, Judge Weinstein appointed Professor Margaret A. Berger, Associate Dean of the Brooklyn Law School, as an expert to advise the Court pursuant to Rule 706 of the Federal Rules of Evidence, 122 B.R. 6. Among the tasks assigned to Dean Berger were reporting to the Court on the feasibility of providing accurate estimates of future claims upon the Trust and on procedures for collecting information and establishing a data base with respect to future claimants, aiding the Court in selecting a panel of knowledgeable and neutral experts, and supervising the work of the panel. Judge Weinstein contemplated that a major issue in the administration of the Trust, pursuant to the proposed settlement, would be the proper allocation of the proceeds of the sale of Trust assets, such as Manville stock, between payment of current claims and maintenance of a reserve for future claims. Critical to that allocation would be estimates of the number of future claimants. Dean Berger testified at the fairness hearing on January 22, 1991, commenting on the difficulty of estimating future claims but expressing the view that reasonably accurate estimates could be made. On April 1, 1991, Dean Berger filed with the Trial Courts an “Interim Rule 706 Report.” She recommended that, pursuant to Rule 706, Dr. Kenneth G. Mantón, Research Professor of Demographic Studies at Duke University, be appointed as an expert to begin preparing projections of future asbestos claimants and that Dr. Joel E. Cohen of Rockefeller University be appointed as a consultant to oversee Prof. Manton's work. She also indicated that it might be appropriate thereafter to appoint a panel of experts to advise Profs. Mantón and Cohen. Judge Weinstein issued an order to all parties to show cause why the Interim Rule 706 Report should not be approved. The Report was opposed by the class representatives on the grounds that the Report exceeded the scope of Dean Berger’s role in connection with the fairness hearing and exceeded the bounds of Rule 706 and conflicted with the fiduciary duties of the Trustees by authorizing a panel of experts charged with the duty of developing estimates concerning future claimants. After hearing the parties’ objections, Judge Weinstein entered the April 22 order, approving the Interim Rule 706 Report and directing the Trust to make $60,000 available for studies to be undertaken at Dean Berger’s direction. The order is challenged in a mandamus petition and an appeal by the class representatives of the health claimants and by the Trustees and defended by the Legal Representative of Future Claimants. DISCUSSION The pending appeal presents a broad array of challenges to the Settlement brought primarily by two groups of appellants — health claimants who objected to the Settlement and co-defendant manufacturers of asbestos. The objecting health claimants contend essentially (1) that the Trial Courts acted beyond judicial authority in developing and engineering the adoption of a legislative solution to the financial difficulties of the Trust, (2) that the Trial Courts exceeded their subject matter jurisdiction, (3) that the Trial Courts lacked personal jurisdiction over absent asbestos disease claimants, (4) that the Settlement violates the Bankruptcy Code in that it modifies a confirmed and substantially consummated plan of reorganization in violation of 11 U.S.C. § 1127(b) (1988), (5) that, even if the Trial Courts have authority to reopen the reorganization and modify the Plan, the Settlement violates specific limitations of the Code, notably the requirement that members of each class receive the “same treatment,” id. § 1123(a)(4), (6) that the Settlement denies health claimants their rights to procedural due process and violates the requirements of Fed.R.Civ.P. 23 because of defects in the class notice, lack of an adequate opportunity to be heard, lack of appropriate subclasses, and lack of an opportunity to opt out of the class, (7) that the Settlement is unfair, (8) that the orders respecting state court actions violate the Anti-Injunction Act, 28 U.S.C. § 2283 (1988), and exceed the Trial Courts’ authority under the All-Writs Act, 28 U.S.C. § 1651 (1988), and (9) that the Trial Courts erred in denying one law firm’s fee application. The co-defendant manufacturers advance essentially two contentions. First, they urge that the class definition improperly groups them with the health claimants in disregard of a fundamental adversity of interests between the two groups. Second, they urge that Section H of the Settlement unlawfully impairs their state law rights and that the Trial Courts’ opinion confirming the Settlement is fatally imprecise to the extent that it endeavors to lessen the rigor of Section H through “interpretation.” I. JUDICIAL AUTHORITY Though the jurisdictional challenges are substantial and merit careful attention, we first consider the even more basic contention that the entire course of events that culminated in the Settlement of the class action represent action beyond the scope of legitimate judicial authority. Specifically, the objecting health claimants contend that Judge Weinstein acted in a legislative capacity in initiating the restructuring of the Trust and shaping the contours of the Settlement. Judge Weinstein was duly designated to act as a district judge of the Southern District by designation of the Chief Judge of this Circuit on January 23,1990. In that capacity and in his normal capacity as a district judge of the Eastern District, he was exercising entirely legitimate authority in supervising the trial preparation of the group of asbestos cases collectively identified as In re Joint Eastern and Southern District Asbestos Litigation. As a district judge with responsibilities for cases seeking recovery from the Manville Trust, he was surely entitled to be concerned with the ability of that Trust to fulfill its expectations. And, having become aware of the developing economic plight of the Trust, he was entitled to act within the framework of the Judicial Branch to initiate remedial steps. At that point, however, Judge Weinstein had no bankruptcy court authority, and the Trust was an integral component of a then pending bankruptcy reorganization. We believe the more prudent course would have been to alert the Bankruptcy Judge then supervising the Manville reorganization as to the adverse effects the Trust’s financial condition was having upon the resolution of pending asbestos cases and also to alert the Chief Judge of the Circuit and the Chief Judge of the Southern District so that those officials could consider the exercise of their authority to effect any necessary special designations. Instead, Judge Weinstein issued sua sponte the orders of June 1,1990, and July 9, 1990, 1990 WL 115761. We think these actions were ill-advised, as they concerned a reorganization proceeding over which Judge Weinstein then had no judicial authority. On July 20, 1990, 1990 WL 115785, however, Judge Weinstein’s authority to take judicial action with respect to the Man-ville reorganization was fully supplied by a grant of supervisory responsibility over the Plan, pursuant to a designation by the Circuit Chief Judge and an assignment order by the Chief Judge of the Southern District. See Asbestos Litigation II, 129 B.R. at 762. Whether or not his actions from that point on were in any respect erroneous, they were fully within his judicial authority. We reject the contention that Judge Weinstein assumed a legislative role in proposing steps to restructure the Trust and working rather forcefully with the parties to accomplish the restructuring. A judge with responsibilities for a lawsuit is not a bystander. Nor is the judge relegated to the role of umpire, awaiting the submission of precisely framed disputes by the parties. Especially in the course of a complex and continuing proceeding such as a bankruptcy reorganization, a judge has an entirely legitimate judicial role in suggesting constructive solutions and assisting the parties in achieving them. Of course, there are limits to the exercise of that role. There is a line to be observed between suggesting the resolution of a dispute and insisting upon it. And all who have exercised judicial authority are aware that, unless a judge acts with caution and sensitivity, there is a risk that what the judge tenders as a suggestion will be perceived as a command. In this proceeding, we are satisfied that, once duly authorized to act with respect to the Manville reorganization, Judge Weinstein did not exceed judicial authority. And whatever infirmity may have attended the issuance of the orders of June 1 and July 9, issued before the July 20 designations, provides no basis for complaint. To a large extent, those orders were advisory only. To whatever extent the July 9 order went beyond advice, it was effectively ratified and validated by the grant of authority conveyed on July 20. II. THE HYBRID NATURE OF THE LAWSUIT The Trial Courts purported to be exercising both bankruptcy court jurisdiction under 28 U.S.C. § 1334 and diversity jurisdiction under 28 U.S.C. § 1332. Asbestos Litigation II, 129 B.R. at 795. Their elaborate opinion does not relate specific rulings to one or the other source of jurisdiction. They observe only that the matter before them is “based primarily on diversity jurisdiction, rather than a pure bankruptcy proceeding.” Id. at 877. Before reviewing the challenges to the exercise of either basis of jurisdiction, we pause to dispel some confusion, reflected in some of the parties’ arguments, as to the respective spheres of authority of a diversity court and a bankruptcy court in this unusual hybrid action. Though the appellants challenge the exercise of both diversity and bankruptcy jurisdiction, they appear, at times, to argue that only bankruptcy jurisdiction is available to deal in any way with the Manville Trust because it is an integral component of a confirmed plan of reorganization. If that is their contention, it is not correct. The Bankruptcy Court in the Chapter 11 proceeding had authority to make changes in the state law rights of creditors and to replace those rights with a new set of state law rights. Just as a reorganized corporation is subject to state law, so also is a trust that emerges from a plan of reorganization. Of course, state law might not, as a substantive matter, be able to alter any of the state law rights enjoyed by those dealing with the reorganized corporation, or in this case, with the Trust, either because state law does not authorize the requested relief or because its attempt to do so encounters constitutional obstacles. Some changes in rights, notably the rights of creditors, can be involuntarily altered only in the exercise of bankruptcy authority. But if a lawsuit is filed asserting a valid state law cause of action against an entity that has emerged from a reorganization plan, that suit may be settled, and any state law rights may be voluntarily modified so long as the settlement is within the subject matter jurisdiction of the court approving it and the settlement is accomplished in observance of all applicable procedural requirements. That is what the appellees contend has occurred in this case — the filing of a state law cause of action to restructure the Trust in a diversity court with subject matter jurisdiction and the settlement of that suit in observance of the procedural requirements of Rule 23. We therefore turn first to the objections to the exercise of the Trial Courts’ diversity jurisdiction and then proceed, in the event deficiencies are encountered, to consider whether the changes wrought by the Settlement may be accomplished in the exercise of bankruptcy jurisdiction. III. EXERCISE OF DIVERSITY JURISDICTION A. Diversity subject matter jurisdiction Appellants contend that not all of the members of the plaintiff class satisfy the $50,000 jurisdictional amount requirement, which all class members must meet. See Zahn v. International Paper Co., 414 U.S. 291, 301, 94 S.Ct. 505, 512, 38 L.Ed.2d 511 (1973). They point out that settlements of asbestos disease claimants have averaged approximately $43,000, and that Level 2 claimants with pleural disease claims are now subjected (as a result of the Settlement) to a $30,000 cap. Neither circumstance defeats diversity jurisdiction. The good faith claim of each plaintiff controls, see St. Paul Mercury Indemnity Co. v. Red Cab Co., 303 U.S. 283, 288-89, 58 S.Ct. 586, 590-91, 82 L.Ed. 845 (1938), and we have no basis for disturbing the Trial Courts’ conclusion that no member of the plaintiff class failed to satisfy the jurisdictional amount. See Asbestos Litigation II, 129 B.R. at 793-94. B. Diversity personal jurisdiction Appellants contend that the Trial Courts lacked personal jurisdiction over absent class members. They rely on Phillips Petroleum Co. v. Shutts, 472 U.S. 797, 105 S.Ct. 2965, 86 L.Ed.2d 628 (1985), in which the Supreme Court outlined the requirements for assertion of personal jurisdiction over absent members of a plaintiff class in an action seeking money damages. Appellees respond that the requirements of Shutts are limited to claims “wholly or predominantly for money judgments,” id. at 811 n. 3, 105 S.Ct. at 2974 n. 3, and that the due process standards for this suit seeking equitable relief are those set forth in Hansberry v. Lee, 311 U.S. 32, 61 S.Ct. 115, 85 L.Ed. 22 (1940). The pending suit is not precisely analogous to either Shutts or Hansberry. It does not seek money damages, yet the “equitable relief” that it seeks in the restructuring of the Trust will have a profound effect upon the amount of damages that each member of the plaintiff class will be entitled to receive. If the members of the plaintiff class were not all beneficiaries of the Trust, we would think that the applicable standards for personal jurisdiction would be drawn more from Shutts than from Hansberry, though even the standards of Shutts, to the extent applicable to this case, may well have been satisfied. However, we agree with the appellees and with the Trial Courts that in rem and quasi in rem jurisdiction is available. See Asbestos Litigation II, 129 B.R. at 798-800. The Trial Courts are fully entitled to exercise jurisdiction over the beneficiaries of a trust created in New York, pursuant to the authority of a Southern District bankruptcy court. See Shaffer v. Heitner, 433 U.S. 186, 207-08 & n. 30, 97 S.Ct. 2569, 2581-82 & n. 30, 53 L.Ed.2d 683 (1977); Mullane v. Central Hanover Bank & Trust Co., 339 U.S. 306, 313, 70 S.Ct. 652, 656, 94 L.Ed. 865 (1950). Whether the changes in the rights of those beneficiaries can be accomplished by the settlement of a class action over the objection of those who were denied the opportunity to opt out of the class is a different question, one that requires consideration of the procedural requirements of Rule 23. C. Rule 23 requirements — the (b)(1)(B) non-opt-out class Normally, we would first consider the appellants' challenges to the specific criteria of Rule 23(a), especially the requirements of typicality and adequacy of representation, and then proceed to consideration of the relevant category of Rule 23(b), in this case, the appropriateness of a mandatory non-opt-out class under Rule 23(b)(1)(B). In this case, however, for reasons to be discussed, we take up these contentions in the reverse order. The Trial Courts certified a class under Rule 23(b)(1)(B), which authorizes a class action where: (1) the prosecution of separate actions by ... individual members of the class would create a risk of ... (B) adjudications with respect to individual members of the class which would as a practical matter be dispositive of the interests of the other members not parties to the adjudications or substantially impair or impede their ability to protect their interests[.] In their view, this case presented the sort of “limited fund” for which the Advisory Committee’s note to the 1966 amendment of Rule 23 makes a (b)(1)(B) class “plainly” available — “when claims are made by numerous persons against a fund insufficient to satisfy all claims.” Fed.R.Civ.P. 23 advisory committee’s note to 1966 amendment; see Asbestos Litigation II, 129 B.R. at 825. The Trial Courts concluded that the insolvency of the Manville Trust rendered it a “limited fund.” Plainly, insolvency does not present the classic instance of a “limited fund,” such as would be involved if a group of claimants asserted claims of an aggregate amount that would deplete a fixed sum of money. Whether, and for what purposes, (b)(1)(B) may be used with respect to an insolvent entity are perplexing issues that we would have expected to have received more extended consideration than is apparent in the cases thus far decided. With respect to aggregate claims in excess of a fixed sum of money, a (b)(1)(B) class action is appropriate to avoid an unfair preference for the early claimants at the expense of later claimants. With respect to an insolvent entity, however, bankruptcy law is normally the source of protection to assure a fair and orderly distribution of assets insufficient to meet claims. Insolvency exerts powerful pressures upon contending creditors to compromise their positions so that a fair distribution of assets is achieved — through a reorganization that contemplates the continuation of the debtor where feasible, and otherwise through liquidation. To lessen the risk that these pressures will lead to unfair compromises, bankruptcy law provides numerous safeguards not contained in class action procedures. For example, for a plan of reorganization to be approved, the plan must be put to a vote of all members of impaired classes of creditors, 11 U.S.C. § 1126, the vote is taken only after a solicitation based on a detailed description of the plan, id. § 1125, the plan can be “crammed down” over the objection of a dissenting class of creditors only if strict fairness standards are met, id. § 1129(b)(1), and the plan may not be imposed against the wishes of an impaired class that would fare better under liquidation, id. § 1129(a)(7). By contrast, Rule 23 is less elaborate in its protections, for example, permitting named representatives of a class, or subclass, to consent to a settlement that binds all the members of the class, or subclass, without a vote of the class or subclass members. And there is no option for those who would fare better under liquidation than under settlement of the class action followed by reorganization to insist on liquidation. These differences raise a substantial question whether a class action may be used to adjust claims against an insolvent entity that is eligible for bankruptcy protection. And, even if, in the context of insolvency, a “limited fund” class action may be used for its traditional purpose of effecting a pro rata reduction of all claims, see Dickinson v. Burnham, 197 F.2d 973 (2d Cir.1952), cert. denied, 344 U.S. 875, 73 S.Ct. 169, 97 L.Ed. 678 (1952), an even more substantial question is raised as to whether a class action may be used against an insolvent entity to adjust the claims of creditors vis-a-vis each other, without observing the protections that would be available under bankruptcy law. Thus far, with one notable exception to be discussed below, courts have moved sparingly in approving class action settlements that adjust creditors’ claims vis-a-vis each other against insolvent entities through the use of a mandatory non-opt-out (b)(1)(B) class. In upholding the use of a (b)(1)(B) “limited fund” class, the Trial Courts relied on two class action rulings of the Eastern District (both rendered by Judge Weinstein), which were affirmed by this Court. See County of Suffolk v. Long Island Lighting Co., 710 F.Supp. 1407 (E.D.N.Y.1989), aff'd, 907 F.2d 1295 (2d Cir.1990); In re Agent Orange Product Liability Litigation, 100 F.R.D. 718 (E.D.N.Y.1983), aff'd, 818 F.2d 145 (2d Cir.1987), cert. denied, 484 U.S. 1004, 108 S.Ct. 695, 98 L.Ed.2d 647 (1988). Our affirmance of those rulings does not support the (b)(1)(B) non-opt-out class certified in this case. In Suffolk County, we faced no issue of the propriety of a (b)(1)(B) class. The class action issue was whether the District Judge had exceeded his discretion in allowing one member of the class to opt out. We ruled he had not. 907 F.2d at 1302-05. In Agent Orange, we upheld the certification of a (b)(3) class because of the centrality of one major issue — the military contractor defense, and we found it unnecessary to consider the propriety of a (b)(1)(B) class. 818 F.2d at 163-67. An earlier decision of this Court in the Agent Orange litigation is arguably more pertinent. In In re Diamond Shamrock Chemicals Co., 725 F.2d 858 (2d Cir.1984), we declined to issue mandamus to vacate Judge Weinstein’s certification of a (b)(1)(B) class limited to the issue of punitive damages. The denial of mandamus does not imply approval, but, in any event, we note that the (b)(1)(B) punitive damages class was not certified to permit the involuntary adjustment of the rights of competing creditors with claims against an insolvent entity. Diamond Shamrock presented a situation much closer to the traditional concept of a limited fund than occurs whenever an entity becomes insolvent. Though the potential amount of aggregate punitive damages had not yet been determined, that amount was finite and was not claimed to have rendered the defendant insolvent. The (b)(1)(B) class was thought appropriate because the recoveries of early successful claimants for punitive damages would quickly reach a total sufficient to assure deterrence, thereby precluding later claimants as a matter of law. Given the large number of potential claimants ... and given the fact that punitive damages ought in theory to be distributed on a basis other than the date of trial, the argument against [the class action] ruling does not justify mandamus. Id. at 862. There was no prospect of the involuntary revision of the rights of competing creditors in contemplation of insolvency. No bankruptcy protections were circumvented. We also take note of the following dictum in Green v. Occidental Petroleum Corp., 541 F.2d 1335 (9th Cir.1976): It is conceivable of course, that the claims of named plaintiffs would be so large that if the action were to proceed as an individual action the decision “would as a practical matter be dispositive of the interests of the other members not parties to the adjudications or substantially impair or impede their ability to protect their interests.” Fed. R.Civ.P. 23(b)(1)(B). This would be the case where the claims of all plaintiffs exceeded the assets of the defendant and hence to allow any group of individuals to be fully compensated would impair the rights of those not in court. Id. at 1340 n. 9. That dictum implied the possible availability of a (b)(1)(B) class action in the context of an insolvent entity, but had no occasion to go further and reckon with the prospect of using such a device to achieve the involuntary adjustment of rights of competing creditors with claims against such an entity. We note that when the Ninth Circuit next considered the Occidental Petroleum dictum, it rejected the certification of a (b)(1)(B) class, even for purposes of punitive damage claims. See In re Northern District of California, Daikon Shield IUD Products Liability Litigation, 693 F.2d 847, 851 (9th Cir.1982). One district court decision has certified a (b)(1)(B) class because of the likelihood that the aggregate total of claims would render the defendant insolvent. See Coburn v. 4-R Corp., 77 F.R.D. 43 (E.D.Ky.1977). That decision, however, had no occasion to reckon with the objection that the class action device might be used to circumvent bankruptcy procedures. Nor did it involve an involuntary modification of creditors’ rights vis-a-vis each other, such as abrogation of the clear order-of-filing priority of rights enjoyed by the objecting health claimants in the pending litigation. If the cases discussed to this point exhausted our jurisprudence, we would seriously doubt whether a mandatory non-opt-out (b)(1)(B) class action may be used to readjust the rights of creditors vis-a-vis each other against an insolvent entity. Though we recognize that the Bankruptcy Rules make Rule 23 of the Civil Rules applicable to adversary proceedings, see Fed.R.Bankr. 7023, we would be wary of any class action settlement that accomplished more than a liquidation and pro rata reduction of the claims of a group of creditors and risked circumvention of Bankruptcy Code protections. See In re Shulman Transport Enterprises, Inc., 21 B.R. 548, 551 (Bankr.S.D.N.Y.1982) (“[A] bankruptcy court must consider the fact that in most instances class action principles are antithetical to those in bankruptcy.”), aff'd, 33 B.R. 383 (S.D.N.Y.1983), aff'd, 744 F.2d 293 (2d Cir.1984). However, respect for the binding force of precedent within this Circuit obliges us to take careful note of the recent decision in In re Drexel Burnham Lambert Group, Inc., 960 F.2d 285 (2d Cir.), cert. filed, 61 U.S.L.W. 3151 (Aug. 13, 1992), which approved a more adventuresome use of a class action settlement to make a non-uniform adjustment of creditors’ rights against an insolvent entity. Drexel involved claims by purchasers of securities sold by the ill-fated firm of Drexel Burnham Lambert. A forerunner of the case was a suit filed by the Securities and Exchange Commission against Drexel seeking, among other things, disgorgement of profits it had made, allegedly on unlawful transactions. The SEC’s suit was settled by Drexel’s payment of $200 million into a fund for defrauded purchasers, with the fund to be augmented by an additional payment of $150 million. Before the second payment was made, Drexel filed for reorganization under Chapter 11. Judge Pollack, before whom were pending suits by many of the defrauded purchasers, then supervised the filing and settlement of a class action, which is highly pertinent to the issues we face in the pending appeal. After the claims of the defrauded purchasers were withdrawn from bankruptcy jurisdiction pursuant to 28 U.S.C. § 157(d) on the ground that they involved issues arising under the securities laws, an elaborate settlement of the claims was reached through the formation of a class action. The principal elements were the division of the purchaser claimants into two subclasses and the specification of the payment rights of each subclass. Subclass A, which held claims with a face amount of $20 billion, was to receive 75 percent of the $350 million fund, plus 75 percent of stated percentages of the liquidation value of various Drexel assets. In addition Subclass A was to pool with Drexel the proceeds from the suits each had against officers and directors of Drexel. Subclass B, which held claims with a face amount of $3.6 billion, was to receive 25 percent of the $350 million fund plus 25 percent of the stated percentages of the funds resulting from liquidation of Drexel assets, but had no participation in the pooling arrangement with respect to suits against Drexel officers and directors. The judgment approving the settlement was affirmed by this Court, over the objection of some members of Subclass B. Drexel, 960 F.2d at 292-93. A major contention of some of the appellants was that the use of a mandatory non-opt-out (b)(1)(B) class constituted an impermissible circumvention of bankruptcy law protections. See, e.g., Brief for Appellants Liggett Group Inc. and Liquid Green Trust at 43-45. Though the opinion contains no explicit consideration of this contention, the Court’s affirmance, in the face of a detailed presentation of the argument, must be regarded as a holding that, at least in the circumstances of the Drexel case, a mandatory non-opt-out (b)(1)(B) class action may be used to accomplish some readjustment of creditors’ rights against an insolvent entity, without observing the protections of bankruptcy law. Especially pertinent to the pending appeal is the designation of subclasses in Drexel for settlement purposes. Recognizing that Subclasses A and B were being treated differently, the District Court accepted the settlement only after receiving the consent of representatives of each of the subclasses, who were adjudged to fairly and adequately represent the interests of all of the members of their respective subclasses. Drexel acknowledges that class actions are not normally to be used in the context of bankruptcy. 960 F.2d at 292. Two circumstances not present in the pending case may have influenced the decision to approve the class action settlement. First, the case involved, at least in part, a traditional limited fund, since the claimants were asserting claims against the $200 million paid by Drexel to the fund assembled by the SEC and to the additional $150 million to be paid to that fund. Second, the settlement was regarded by this Court as a necessary prerequisite to a successful reorganization plan. Drexel, 960 F.2d at 293. By contrast, the pending case involves a “limited fund” only in the sense that, like any insolvent entity, the assets of the Man-ville Trust, including its income stream, are insufficient to pay present and future claims. And the class action here is not a prerequisite to a reorganization, but a change in rights already established in a confirmed and substantially consummated plan of reorganization. Indeed, it is arguable that the Settlement in the pending case, by abandoning the order-of-payment priority, accomplishes a more substantial adjustment of creditors’ rights than occurred in Drexel, where creditors with only an expectation of recovery in effect had those expectations valued by being relegated to specified percentages of different asset pools for their recoveries. These differences make us somewhat skeptical of permitting the use of a mandatory non-opt-out class in this case. But, though the question is close, we are not persuaded that the need to insist on bankruptcy law protections is greater in this case than it was in Drexel, and the reasonableness of using a (b)(1)(B) non-opt-out class is at least as compelling in this case as in Drexel. We are therefore willing to permit the use of such a class action in the pending case, so long as there exists, as occurred in Drexel, appropriate designation of subclasses to provide assurance that the consent of groups of claimants who are being treated differently by the settlement is being given by those who fairly and adequately represent only the members of each group. The inevitable tension between the limited protections of Rule 23 and the more complete protections of the Bankruptcy Code is strained by any use of a mandatory non-opt-out class to settle claims against an insolvent entity that is subject to bankruptcy jurisdiction. But that tension reaches the breaking point when, instead of the traditional limited fund settlement that achieves a pro rata reduction of the claims of all members of the plaintiff class, the rights of the plaintiff class are revised vis-a-vis each other and consent to the resulting settlement is given by representatives who purport to represent the undifferentiated class of plaintiffs as a whole, rather than the interests of each of the subclasses whose rights are being altered. We therefore proceed to an examination of the appellants’ contentions regarding the lack of subclasses, mindful that these contentions require careful scrutiny in the unusual context where settlement of a class action is used to readjust creditors’ claims against an insolvent entity, without observance of the protections that would otherwise be available under the Bankruptcy Code. D. Rule 23 requirements — the class definition 1. Objection of the co-defendant manufacturers. The co-defendant manufacturers object to the class definition on the ground that it improperly places them within the same class as the health claimants, a grouping that they contend violates the typicality and adequacy of representation requirements of Rule 23(a)(3) and (4). We agree with their objection. The health claimants and the co-defendant manufacturers have been adversaries for many years in thousands of lawsuits in courts throughout the country. Their interests are profoundly adverse to each other. The health claimants wish to receive as much as possible from the co-defendant manufacturers, and the latter wish to hold their payment obligations to a minimum. More significantly, this adversity was at the heart of one important aspect of the proposed restructuring of the Trust — the provisions of Section H of the Settlement adjus