BANK UNITED CORP LITIGATION CONTINGENT PAYMENTS RIGHTS TRUST
424B3, 2001-01-12
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<PAGE>
                                               As Filed Pursuant to Rule 424(b)3
                                                      Registration No. 333-49302

                             DATED JANUARY 9, 2001

                                     [LOGO]

                                 PROSPECTUS OF
                    BANK UNITED CORP. LITIGATION CONTINGENT
                              PAYMENT RIGHTS TRUST
                            CONTINGENT PAYMENT RIGHT
                                  CERTIFICATES

                            ------------------------

    This prospectus relates to the issuance of transferable contingent payment
rights certificates to Bank United Corp. stockholders in conjunction with Bank
United Corp.'s proposed merger with Washington Mutual, Inc. The rights
certificates represent the right to receive a portion of Bank United Corp.'s
share of the proceeds of any judgment or settlement in its forbearance
litigation against the United States. Although Bank United Corp. cannot
guarantee that it will receive any proceeds in its forbearance litigation, based
on the assumptions described in this prospectus, if the litigation is ultimately
successful the rights certificates will represent the right to receive between
approximately $1.01 and $7.07 per rights certificate. Bank United Corp.
stockholders will generally recognize gain for federal income tax purposes upon
the receipt of the rights certificates that could be equal to the full fair
market value of the rights certificates at the time of the issuance. Additional
information regarding the federal income tax consequences of the receipt of
rights certificates can be found on page 1 of this prospectus.

    The issuance of the rights certificates will not occur unless Bank United
Corp. stockholders approve the issuance and the Washington Mutual merger and all
of the other conditions to completion of those transactions are satisfied or
waived in accordance with the terms of the agreements governing those
transactions. The initial issuance of rights certificates and the Washington
Mutual merger are expected to occur in the first quarter of 2001. Bank United
Corp. is seeking to have the rights certificates authorized for quotation on the
Nasdaq National Market System under the symbol "BNKUZ."

    THE RIGHTS CERTIFICATES ARE HIGHLY SPECULATIVE SECURITIES THAT INVOLVE A
HIGH DEGREE OF RISK FOR PURCHASERS OF THE RIGHTS CERTIFICATES AFTER THEIR
ISSUANCE IN THE REORGANIZATION AND MAY NOT BE APPROPRIATE INVESTMENTS FOR THE
AVERAGE INVESTOR. SEE "RISK FACTORS" ON PAGE 5 FOR FACTORS YOU SHOULD CONSIDER
REGARDING INVESTMENTS IN THE RIGHTS CERTIFICATES.
                            ------------------------

    THE RIGHTS CERTIFICATES OFFERED BY THIS PROSPECTUS HAVE NOT BEEN APPROVED OR
DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
COMMISSION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                            ------------------------

    THE RIGHTS CERTIFICATES OFFERED BY THIS PROSPECTUS ARE NOT SAVINGS ACCOUNTS,
DEPOSITS OR OTHER OBLIGATIONS OF A BANK OR SAVINGS ASSOCIATION AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENTAL
AGENCY.
<PAGE>
                      REFERENCES TO ADDITIONAL INFORMATION

    This document incorporates important information about the registrant and
the rights certificates that are not included in or delivered with this
document. This information is available to you without charge upon your written
or oral request. You can obtain documents related to the rights trust that are
incorporated by reference in this document, without charge, by requesting them
in writing or by telephone from Bank United Corp. on behalf of the registrant:

                               Bank United Corp.
                             3200 Southwest Freeway
                                   Suite 2600
                           Houston, Texas 77251-1370
                                 (713) 543-6500

    IF YOU WOULD LIKE TO REQUEST DOCUMENTS, PLEASE DO SO BY FEBRUARY 1, 2001 TO
RECEIVE THEM BEFORE THE SPECIAL MEETING OF BANK UNITED CORP. STOCKHOLDERS.

    See "Where You Can Find Additional Information" on page 25.
<PAGE>
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                              PAGE
                                            --------
<S>                                         <C>
SUMMARY...................................      1
The Rights Certificates...................      1
Bank United Corp. Stockholders May
  Recognize Gain For Federal Income Tax
  Purposes as a Result of the Proposed
  Transactions............................      1
Resales of Rights Certificates............      2
Application for Listing the Rights
  Certificates on the NASDAQ National
  Market System...........................      2
The Forbearance Litigation................      2
The Trusts................................      3
The Commitment Agreement and Payment to
  Rights Certificate Holders..............      3
Management of the Forbearance Litigation
  and the Trusts..........................      4
Expenses of the Trusts....................      4
The Reorganization and Distribution of the
  Rights Certificates.....................      4
Effect of the Merger......................      4
RISK FACTORS..............................      5
The Value of the Rights Certificates May
  Be Adversely Affected by Actions or
  Inactions Relating to the Control of the
  Forbearance Litigation..................      5
The Amount and Type of Damages from the
  Forbearance Litigation Are Unknown......      5
Payments, if any, to Rights Certificate
  Holders Cannot Be Assured...............      5
The Rights Trust May Not Have Adequate
  Funds for Expenses......................      6
Rights Certificate Holders Will Have Only
  Limited Rights With Respect to the
  Trusts, the Trustees and Bank United
  Corp....................................      6
The Rights Certificates May Be Difficult
  to Sell Due to the Absence of an Active
  Trading Market for the Rights
  Certificates............................      7
The Trading Value of the Rights
  Certificates May Fluctuate Widely.......      7
An Investment in Rights Certificates is
  Substantially Different from an
  Investment in a Savings and Loan Holding
  Company.................................      8
There May Not Be Information Regarding
  Developments in the Forbearance
  Litigation Available to Permit an
  Informed Decision to Buy, Hold or Sell
  Rights Certificates.....................      8
</TABLE>

<TABLE>
<CAPTION>
                                              PAGE
                                            --------
<S>                                         <C>
The Payment Trust's Right to Receive any
  Litigation Proceeds Will be Subordinated
  to the Claims of Secured Creditors of
  Bank United Corp. or its Successors and
  their Subsidiaries in any Bankruptcy or
  Insolvency Proceeding...................      8
THE TRUSTS................................      9
THE FORBEARANCE LITIGATION................      9
General...................................      9
Related Cases.............................     10
Damages...................................     10
Management of the Forbearance
  Litigation..............................     11
THE COMMITMENT AGREEMENT: PAYMENT
  PROCEDURE...............................     12
DESCRIPTION OF THE RIGHTS CERTIFICATES....     14
General...................................     14
Resales of Rights Certificates............     14
Tradability...............................     14
Payment Procedures for Rights
  Certificates............................     14
Timing of Payments........................     15
Expenses and Retained Amount..............     15
THE COMMITMENT AGREEMENT: ADDITIONAL
  INFORMATION.............................     15
Tax Effects on the Commitment Amount......     15
Indemnification and Related Obligations;
  Liability...............................     17
Restrictions on the Conduct of Bank United
  Corp....................................     20
THE BANK UNITED CORP. REORGANIZATION AND
  THE DISTRIBUTION OF RIGHTS
  CERTIFICATES............................     20
MATERIAL FEDERAL INCOME TAX
  CONSEQUENCES............................     21
Characterization of the Rights
  Certificates and Trust..................     22
Characterization of the Commitment;
  Section 483.............................     23
Sale of Rights Certificates...............     24
Receipt of Payments on the Commitment.....     24
Lack of a Cash Recovery...................     24
Other Characterizations...................     24
Funding of Additional Expenses............     24
Backup Withholding and Information
  Reporting...............................     25
WHERE YOU CAN FIND ADDITIONAL
  INFORMATION.............................     25
VALIDITY OF THE RIGHTS CERTIFICATES.......     26
</TABLE>

<TABLE>
<S>                   <C>
APPENDICES:

                      -- Form of Declaration of Trust (Contingent Payment Rights
APPENDIX A            Trust)
APPENDIX B            -- Form of Declaration of Trust (Payment Rights Trust)
APPENDIX C            -- Form of Commitment Agreement
</TABLE>
<PAGE>
                                    SUMMARY

    THIS SUMMARY HIGHLIGHTS INFORMATION CONTAINED ELSEWHERE IN THIS PROSPECTUS.
THE SUMMARY DOES NOT CONTAIN ALL OF THE INFORMATION THAT YOU SHOULD CONSIDER AND
IS SUBJECT TO AND QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE MORE DETAILED
INFORMATION CONTAINED ELSEWHERE IN THIS PROSPECTUS.

THE RIGHTS CERTIFICATES (SEE PAGE 14)

    The contingent payment rights certificates that are the subject of this
prospectus will represent the right to receive Bank United Corp's share of the
proceeds of any judgment or settlement in its forbearance litigation against the
United States, subject to adjustments described in this document. This right
will be governed by two Delaware business trusts described below and a
commitment agreement that will be entered into between the two trusts, Bank
United Corp. and its wholly owned savings and loan subsidiary.

    If Bank United Corp. succeeds in its litigation against the United States,
it is estimated that the holders of rights certificates could receive between
$1.01 and $7.07 per rights certificate. This estimate is based on the three
alternative damage models asserted by Bank United Corp. in the litigation,
estimates of potential taxes and litigation expenses and the approximate number
of rights certificates to be issued as described in this prospectus. See "The
Forbearance Litigation--Damages" and "Description of the Rights
Certificates--Expenses and Retained Amount."

    These potential recovery amounts do not include any discount for the time
value of money. In addition, the number of rights certificates outstanding at
the time of any payment could be greater than the number of rights certificates
issued in the reorganization, which would decrease the portion of any recovery
proceeds that will be received by each rights certificate. Securities based on
contingent recovery rights in cases similar to the Bank United Corp. forbearance
litigation currently trade at values significantly less than the per share value
of the potential recoveries. No assurance can be made as to the likely recovery
per rights certificate or the likely trading value of the rights certificates.

BANK UNITED CORP. STOCKHOLDERS MAY RECOGNIZE GAIN FOR FEDERAL INCOME TAX
  PURPOSES AS A RESULT OF THE PROPOSED TRANSACTIONS (SEE PAGE 21)

    A Bank United Corp. stockholder will generally recognize gain upon the
receipt of the rights certificates if the stockholder has a realized gain on the
transaction, that is, if the stockholder's basis in its Bank United Corp. common
stock is less than the sum of the fair market values of the rights certificates
and the Washington Mutual common stock received in the Washington Mutual merger.
The gain recognized will generally equal the full value of the rights
certificates received if the value of the rights certificates is equal to or
greater than the realized gain.

    The rights certificates along with new shares of Bank United Corp. common
stock will be issued to stockholders of Bank United Corp. in the reorganization
as described below. See "--The Reorganization and Distribution of the Rights
Certificates." Following that reorganization, the new shares of Bank United
Corp. common stock issued in the reorganization will be exchanged for shares of
Washington Mutual common stock in the merger of Bank United Corp. and Washington
Mutual, Inc.

    The reorganization and Washington Mutual merger have been structured in a
manner so as to qualify as a "reorganization" within the meaning of Section
368(a) of the Internal Revenue Code. As a result, Bank United Corp. stockholders
who exchange their shares of Bank United Corp. common stock for new shares of
Bank United Corp. common stock and rights certificates in the reorganization and
then exchange those new shares of Bank United Corp. common stock for shares of
Washington Mutual

<PAGE>
common stock in the Washington Mutual merger will recognize gain, but not loss,
in the exchange. The gain, if any, that is recognized in the exchange will be
equal to the lesser of:

    - the fair market value of the rights certificates received in the
      reorganization or

    - the amount of gain realized as a result of the exchange.

The amount of gain realized in the exchange will equal the excess of:

    - the sum of the fair market value of the rights certificates and the fair
      market value of the Washington Mutual common stock received in the
      exchange over

    - the tax basis of the shares of Bank United Corp. common stock exchanged.

    For example, assume that a Bank United Corp. stockholder with an aggregate
tax basis in its Bank United Corp. common stock of $500 receives rights
certificates with a fair market value of $50 and Washington Mutual common stock
with a fair market value of $700. The Bank United Corp. stockholder has a
realized gain of $250, that is, the sum of the fair market values of the rights
certificates ($50) and the Washington Mutual common stock ($700), less the
stockholder's basis in its Bank United Corp. common stock ($500). Because the
fair market value of the rights certificates received ($50) is less than the
stockholder's realized gain ($250), the stockholder will recognize a gain equal
to the full value of the rights certificates received. If, on the other hand,
the fair market value of the rights certificates received were more than the
stockholder's realized gain, the stockholder would recognize a gain equal to the
smaller realized gain, and if the stockholder had a realized loss, the
stockholder would not recognize any gain or loss.

    The obligations of Bank United Corp. and Washington Mutual, Inc. to complete
the transactions are conditioned on receipt of legal opinions regarding the
federal income tax treatment of the transactions to the companies and their
stockholders. These opinions will not bind the Internal Revenue Service, which
could take a different view.

    This tax treatment may not apply to all Bank United Corp. stockholders,
including those stockholders who dissent from the reorganization. Determining
the actual tax consequences of the transactions to you can be complicated. They
will depend on your specific situation and on variables not within the control
of Bank United Corp., Washington Mutual, Inc. or the trusts. You should consult
your own tax advisor for a full understanding of the tax consequences to you.

RESALES OF RIGHTS CERTIFICATES (SEE PAGE 14)

    The rights certificates will be freely transferable by the holders of such
rights certificates, except for those holders who may be deemed to be
"affiliates" of the trust under applicable federal securities laws. See
"Description of the Rights Certificates--Resales of the Rights Certificates" and
"Risk Factors."

APPLICATION FOR LISTING THE RIGHTS CERTIFICATES ON THE NASDAQ NATIONAL MARKET
  SYSTEM (SEE PAGE 14)

    There is no current market for the rights certificates. Bank United Corp.,
on behalf of the rights trust, will promptly apply for quotation of the rights
certificates on the NASDAQ National Market System under the symbol "BNKUZ."

THE FORBEARANCE LITIGATION (SEE PAGE 9)

    On July 25, 1995, Bank United Corp. and its co-plaintiffs, Bank United and
Hyperion Partners L.P., filed suit against the United States in the U.S. Court
of Federal Claims for alleged failures of the United States to adhere to its
agreement to waive or forbear from enforcing certain provisions concerning
regulatory capital requirements, liquidity requirements, accounting requirements
and other matters. In March 1999, the U.S. Court of Federal Claims granted Bank
United Corp.'s motion for

                                       2
<PAGE>
summary judgment on the issue of liability, holding the United States liable for
all claims. Bank United Corp. and its co-plaintiffs seek damages in excess of
$560 million. Under the terms of the recovery agreement entered into by Bank
United Corp., Bank United and Hyperion Partners L.P., Bank United Corp. and Bank
United are collectively entitled to 85% of any recovery proceeds.

THE TRUSTS (SEE PAGE 9)

    The rights certificates' right to receive Bank United Corp.'s share of the
proceeds of any judgment or settlement in its forbearance litigation against the
United States is an indirect right. This indirect right results from the rights
certificates' ownership interests in the assets of the Bank United Corp.
Litigation Contingent Payment Rights Trust created by Bank United Corp. The
assets of the rights trust consist primarily of the right to receive those
proceeds, subject to certain adjustments described in this document. This right
is governed by the commitment agreement described below.

    Bank United Corp. also created the Bank United Corp. Payment Rights Trust.
The payment trust was created to manage the payment of any proceeds from Bank
United Corp. to the rights trust. The payment trust will receive the applicable
portion of any litigation recovery and pay that amount, subject to certain
adjustments described in this document, to the rights trust. See "--The
Commitment Agreement and Payment to Rights Certificate Holders."

    The trusts will governed by their declarations of trust and Delaware law.
The declarations of trust will be substantially the same as Appendices A and B.
The trusts will be managed by the litigation trustees. See "Management of the
Forbearance Litigation and the Trusts."

THE COMMITMENT AGREEMENT AND PAYMENT TO RIGHTS CERTIFICATE HOLDERS (SEE
  PAGE 12)

    Prior to the reorganization, Bank United Corp. will enter into a commitment
agreement, substantially the same as Appendix C. Under that agreement Bank
United Corp. will be obligated to pay to the payment trust the commitment
amount, which is the portion of the proceeds that Bank United Corp. and its
subsidiary, Bank United, receive in any recovery in their forbearance litigation
against the United States after making the adjustments described in the next
sentence. The payment will be reduced by an amount necessary to reimburse Bank
United Corp. for the expenses that Bank United Corp. advances to the rights
trust and to pay certain other expenses and obligations, but will be increased
by the amount of the net tax benefits Bank United Corp. receives as a result of
advancing expenses and paying that amount.

    When the payment trust receives the commitment amount, it will immediately
forward that amount to the rights trust, with that amount increased by any
interest earned on that amount but reduced by any amounts Bank United Corp.
withdraws from that amount to pay taxes it owes solely by reason of its
ownership of the payment trust. If the commitment amount is paid to the payment
trust prior to the 366th day following the completion of the reorganization,
instead of forwarding payment to the rights trust, the payment trust will hold
that amount in trust until the 366th day following completion, at which time the
payment trust will make the applicable payment to the rights trust.

    Within 60 days of the receipt of any proceeds from the payment trust, the
rights trust will pay to the holders of the rights certificates the payment
amount, which consists of the proceeds from the payment trust less the amount
held back to pay any of its accrued but unpaid expenses. In addition, the
litigation trustees may reduce the amount of that payment by $1.0 million or
such greater amount as the litigation trustees reasonably determine to be
necessary to pay additional expenses or to satisfy the rights trust's
indemnification obligations. Any retained amounts will be retained for a period
of one year or any longer period that the litigation trustees reasonably
determine to be necessary. The rights trust is obligated to pay any remaining
portion of the retained amounts within 90 days of the expiration of the
applicable retention period.

                                       3
<PAGE>
MANAGEMENT OF THE FORBEARANCE LITIGATION AND THE TRUSTS (SEE PAGE 11)

    Jonathon K. Heffron, Executive Vice President, Chief Operating Officer and
General Counsel of Bank United Corp., and Salvatore A. Ranieri, a director of
Bank United Corp., will be the litigation trustees of the rights trust and the
payment trust. Both Mr. Heffron and Mr. Ranieri have knowledge of the facts
underlying the forbearance litigation. As the litigation trustees, they will
have full authority to instruct Bank United Corp. and Bank United to dismiss,
settle or end the prosecution of the forbearance litigation. Administration of
the trusts will be conducted by an institutional trustee. There will also be a
Delaware trustee as required by Delaware law.

    In return for their services as litigation trustees for a three-year period
following the reorganization, Messrs. Heffron and Ranieri each will be paid
aggregate fees of $1.5 million, payable in cash in advance in 12 equal quarterly
installments. Any portion of these fees that has not been paid as of the final
resolution of the forbearance litigation will accelerate and be paid immediately
in a lump sum. In addition, the rights trust will issue to each of Mr. Heffron
and Mr. Ranieri rights certificates equal to 0.75% of the total number of rights
certificates issued as a result of the reorganization. These rights certificates
will be subject to transfer restrictions and potential forfeiture under limited
circumstances.

EXPENSES OF THE TRUSTS (SEE PAGE 15)

    Under the commitment agreement, Bank United Corp. is obligated to advance
amounts to pay expenses of the trusts, including expenses of the forbearance
litigation, fees and expenses of the litigation trustees and all administrative
expenses. The obligation of Bank United Corp. to advance amounts for expenses
will be capped at $10 million, but this cap will increase to $13 million if the
forbearance litigation is pursued through additional trial court proceedings and
appeals. Any advanced expenses will reduce the size of the commitment amount as
described above. The rights trust may issue additional rights certificates after
the reorganization if necessary to pay expenses. The contingent payment rights
trust may borrow funds in order to pay expenses if those borrowings represent
debt of the contingent payment rights trust and not ownership interests for
federal income tax purposes. See "Risk Factors--Adequacy of the Expense Fund."

THE REORGANIZATION AND DISTRIBUTION OF THE RIGHTS CERTIFICATES (SEE PAGE 20)

    Immediately before the merger of Bank United Corp. and Washington
Mutual, Inc. the rights trust will issue rights certificates to Bank United
Corp. Bank United Corp. will then issue rights certificates to its stockholders
in the reorganization. Bank United Corp. will also retain or issue rights
certificates for Bank United Corp. stock options and Bank United Corp. 8%
premium income equity securities. See "The Reorganization and the Distribution
of the Rights Certificates."

    A special meeting of Bank United Corp. stockholders will be held on
February 8, 2001 at 10:00 a.m., at The Holiday Inn Select, 2712 Southwest
Freeway, Windsor I and II Ballrooms, Houston, Texas, to approve the agreements
providing for the reorganization and the Washington Mutual merger. Unless the
Bank United Corp. stockholders approve both proposals and all of the other
conditions to the reorganization and the Washington Mutual merger are satisfied
or waived in accordance with the terms of the agreements governing those
transactions, the rights certificates will not be distributed.

EFFECT OF THE MERGER

    In the merger agreement between Bank United Corp. and Washington
Mutual, Inc., Washington Mutual, Inc. has agreed to perform the obligations of
Bank United Corp. under the commitment agreement, the declarations of trust and
the related agreements to which Bank United Corp. is a party. Unless otherwise
indicated, references to Bank United Corp. in this prospectus will also refer to
Washington Mutual, Inc. upon completion of the Washington Mutual merger.

                                       4
<PAGE>
                                  RISK FACTORS

    INVESTORS SHOULD CAREFULLY CONSIDER THE FOLLOWING RISK FACTORS, AS WELL AS
ALL THE OTHER INFORMATION SET FORTH IN THIS PROSPECTUS REGARDING THE RIGHTS
CERTIFICATES.

THE VALUE OF THE RIGHTS CERTIFICATES MAY BE ADVERSELY AFFECTED BY ACTIONS OR
  INACTIONS RELATING TO THE CONTROL OF THE FORBEARANCE LITIGATION

    The litigation trustees will have the contractual right to instruct Bank
United Corp. and Bank United regarding the management of the forbearance
litigation, including, among other things, to dismiss, settle or cease
prosecuting the forbearance litigation at any time without regard to the impact
of any such settlement on the value of the rights certificates and without
obtaining any cash or other recovery. However, because neither of the litigation
trustees controls Bank United Corp., there can be no assurance that Bank United
Corp. or Bank United will comply with the instructions of the litigation
trustees. In addition, although the litigation trustees currently intend to
cause Bank United Corp. and Bank United to continue to prosecute the forbearance
litigation and to seek a cash recovery, there can be no assurance that the
litigation trustees will not make a different determination in the future. There
can also be no assurance that either of the initial litigation trustees, both of
whom have knowledge of the facts underlying the forbearance litigation, will
remain a litigation trustee, and the holders of the rights certificates will
have no rights to elect, remove or replace any litigation trustee.

THE AMOUNT AND TYPE OF DAMAGES FROM THE FORBEARANCE LITIGATION ARE UNKNOWN

    The forbearance litigation presents issues as to the amount, if any, and
type of damages that may be recoverable by the plaintiffs. Although Bank United
Corp. and Bank United were granted a favorable summary judgment on the issue of
liability, the court has not ruled on the amount, if any, and type of damages.
The United States has argued that some or all of the damages as to which
recovery is sought by the plaintiffs in similar cases are too speculative to
permit a recovery. In addition, even though the forbearance litigation was
prosecuted to an initial favorable judgment on the issue of liability, that
judgment is likely to be appealed by the federal government. For these and
related reasons, there can be no assurance as to the amount, if any, and type of
damages that Bank United Corp. and Bank United may recover. There can be no
assurance that Bank United will obtain any monetary recovery in the forbearance
litigation. In addition, if there is a recovery, there cannot be any assurance
as to the timing of the recovery. It could be a very lengthy time before any
payment is made and collected.

PAYMENTS, IF ANY, TO RIGHTS CERTIFICATE HOLDERS CANNOT BE ASSURED

    Any proceeds of the forbearance litigation received by Bank United Corp. or
its subsidiaries will first be applied to reimburse amounts advanced to the
rights trust as well as any liability incurred by Bank United Corp. from the
rights trust. After it receives a payment from the payment trust, the rights
trust will be obligated to hold a portion of the proceeds for one year or longer
if the litigation trustees determine a longer period is reasonably likely to be
required to cover all expenses, costs and claims and indemnification obligations
that may be incurred or arise after payment. Furthermore, it is impossible to
predict the total amount of any recovery available to be paid to the rights
certificates holders because any recovery in the forbearance litigation could be
less than the fees, costs, taxes and tax benefits associated with that recovery.
To the extent that Bank United Corp. or Bank United must engage in protracted
litigation, those fees and costs may increase significantly. See "Description of
the Rights Certificates."

    Even in the event that a favorable final judgment or settlement is obtained,
some or all of the damages might not be cash, in which case Bank United Corp.
will have to liquidate these non-cash proceeds as instructed by the litigation
trustees. No assurance can be provided that Bank United Corp.

                                       5
<PAGE>
will be able to convert such non-cash proceeds into cash or, even if this is
possible, that the cash obtained will be the equivalent of the fair market value
of the non-cash proceeds.

    Bank United Corp. is a savings and loan holding company within the meaning
of the Home Owner's Loan Act and is subject to regulation by the Office of
Thrift Supervision. Bank United is a federally chartered savings and loan
association holding federally insured deposits and is subject to regulation by
the Office of Thrift Supervision and other regulators, including the Federal
Deposit Insurance Corporation. Washington Mutual, Inc. and Washington Mutual
Bank, FA, are also subject to similar regulatory requirements. If any of the
regulations prohibit distribution of the commitment amount (or any part of that
amount), the commitment agreement permits payment to be delayed for up to
90 days after receipt so that any regulatory requirements can be satisfied. More
information concerning supervision and regulation can be found in the filings
Bank United Corp. and Washington Mutual, Inc. have made with the Securities and
Exchange Commission. See "Where You Can Find Additional Information."

    Although Bank United Corp. will be obligated to pay the commitment amount to
the payment trust, the commitment agreement, the declaration of trust and the
rights certificates will provide that no rights certificate holder will have the
right to bring any action against Bank United Corp. and its affiliates or any of
their officers, directors or employees for a breach of that obligation. The
rights trust, or the litigation trustees on behalf of the rights trust, however,
will be authorized to bring suit against Bank United Corp. for any breach of the
commitment agreement.

THE RIGHTS TRUST MAY NOT HAVE ADEQUATE FUNDS FOR EXPENSES

    The rights trust will incur a variety of expenses, including the costs of
prosecuting the forbearance litigation (including the fees and expenses of
counsel, experts and consultants), compensation of the institutional trustee,
the Delaware trustee and the litigation trustees, the rights trust's
indemnification obligations and liability insurance for the rights trust's
indemnification obligations and any liabilities of the litigation trustees.
There is no assurance that the amounts to be forwarded by Bank United Corp. will
be sufficient to cover those fees and expenses, and to the extent that Bank
United Corp. and Bank United must engage in protracted litigation, those fees
and expenses may increase significantly.

    The rights trust may issue additional rights certificates in order to pay
expenses. However, there may not be any willing purchasers of additional rights
certificates and there can be no assurance that, if there are any such
purchasers, the terms of any purchase would be reasonable. In the event
additional rights certificates are issued the existing rights certificate
holders' proportionate interest in the payment amount may be diluted. The rights
trust will be authorized to borrow additional funds for the sole purpose of
funding expenses of the rights trust, but only if such borrowings represent debt
of the rights trust and not ownership interests for federal income tax purposes.
Furthermore, it may not be possible for the rights trust to borrow funds and, if
it is able to borrow funds, there can be no assurance that the terms of such
borrowings will be reasonable.

RIGHTS CERTIFICATE HOLDERS WILL HAVE ONLY LIMITED RIGHTS WITH RESPECT TO THE
  TRUSTS, THE TRUSTEES AND BANK UNITED CORP.

    The litigation trustees will have no liability to rights certificate holders
unless it is established in a final judicial determination by clear and
convincing evidence that any action or omission of the litigation trustees was
undertaken with deliberate intent to injure the rights certificate holders or
with reckless disregard for the best interests of those holders. In any event,
any liability will be limited to actual damages. In addition, the declaration of
trust for the rights trust will provide that the institutional trustee and the
Delaware trustee to the rights trust will have no liability to the rights
certificate holders other than for acts or omissions committed with gross
negligence or willful

                                       6
<PAGE>
misconduct. Under Delaware law, parties generally cannot agree to eliminate
liability for acts or omissions involving gross negligence or willful
misconduct.

    Rights certificate holder will not have the right to bring any action
against the litigation trustees or otherwise under the declaration of trust to
enforce or otherwise act in respect of the rights certificates unless the holder
has previously given written notice to the litigation trustees of the substance
of the dispute, and holders of at least a majority in interest of the issued and
outstanding rights certificates have given written notice to the holders seeking
to bring suit that they support the action brought to resolve that dispute.

    Bank United Corp., Bank United, their affiliates, officers, directors,
employees or agents will have no liability to the holders of the rights
certificates. Without limiting the generality of the foregoing, none of the
rights certificate holders, the trustees or the trusts will have the right to
enforce, institute or maintain any suit, action or proceeding against Bank
United Corp., Bank United, their affiliates, officers, directors, employees or
agents relating to the formation of the trusts, the entering into of the
commitment agreement, the distribution of the rights certificates, the
forbearance litigation or the performance by the litigation trustees of their
duties as litigation trustees. However, the rights trust, or the litigation
trustees on behalf of the rights trust, may bring suit against Bank United Corp.
for breach of the commitment agreement or failure to deliver any rights
certificate required to be returned when so required.

    Rights certificate holders will have no voting rights (except regarding
certain types of amendments to the declaration of trust for the contingent
payment rights trust and except for limited rights regarding removal of the
institutional trustee and the Delaware trustee to the rights trust), no
liquidation preference and no rights to dividends or distributions other than
their pro rata share of the commitment amount plus any other rights trust
assets. In addition, the rights trust will have no assets other than the
commitment agreement and any funds raised by the rights trust.

THE RIGHTS CERTIFICATES MAY BE DIFFICULT TO SELL DUE TO THE ABSENCE OF AN ACTIVE
  TRADING MARKET FOR THE RIGHTS CERTIFICATES

    There is no current market for the rights certificates. Bank United Corp.,
on behalf of the rights trust, will promptly apply for quotation of the rights
certificates on the NASDAQ National Market System under the symbol "BNKUZ." No
assurance can be given that the rights certificates will satisfy the
requirements for quotation on the NASDAQ National Market System or any other
trading system. If the rights certificates cannot be quoted or listed on any
trading system, there would likely be only minimal or no trading channels for
the rights certificates. This would result in severely reduced liquidity for
investors in the rights certificates. Even if the rights certificates are quoted
or listed on the Nasdaq or other trading market, there can be no assurance that
an active market will develop or be sustained.

THE TRADING VALUE OF AN INVESTMENT IN RIGHTS CERTIFICATES MAY FLUCTUATE WIDELY

    The price of the rights certificates will depend on a number of factors.
These factors include, without limitation, the nature of court decisions and
opinions in the Bank United Corp. forbearance litigation and similar cases that
may be decided prior to the Bank United Corp. forbearance litigation and
speculation about the outcome of the forbearance litigation and litigation of
those similar cases, settlement of any similar cases and Bank United Corp.'s
ability to pay the commitment amount to the contingent payment rights trust.
Consequently, there could be wide fluctuations in the price of rights
certificates over short periods of time.

                                       7
<PAGE>
AN INVESTMENT IN RIGHTS CERTIFICATES IS SUBSTANTIALLY DIFFERENT FROM AN
  INVESTMENT IN A SAVINGS AND LOAN HOLDING COMPANY

    The nature of an investment in the rights certificates differs from the
nature of an investment in a savings and loan holding company such as Bank
United Corp. or Washington Mutual. Some current Bank United Corp. stockholders
may therefore determine that investment in the rights certificates does not
comport with their investment policies or, in the case of corporate or
institutional stockholders, that such investment may be restricted by their
charters. Such determinations by holders of a large number of shares of Bank
United Corp. common stock may result in a quick sell-off of rights certificates
by those holders, causing temporary selling pressure that could adversely affect
the price of the rights certificates for some period following the effective
time of the merger.

THERE MAY NOT BE INFORMATION REGARDING DEVELOPMENTS IN THE FORBEARANCE
  LITIGATION AVAILABLE TO PERMIT AN INFORMED DECISION TO BUY, HOLD OR SELL
  RIGHTS CERTIFICATES

    The rights trust will file annual reports on Form 10-K and quarterly reports
on Form 10-Q that will include an overview of the status of the forbearance
litigation. The rights trust will also file a report on Form 8-K if there is a
material judicial decision in the forbearance litigation or any agreement to
settle the forbearance litigation. The rights trust's ability to disclose
details of the forbearance litigation may be limited, however, by the inherent
nature and rules of judicial proceedings, including, among other things,
proceedings and filings that are sealed by the court, matters involving
attorney-client privilege and proceedings that are conducted on a confidential
basis by agreement of the parties, such as settlement negotiations.

THE PAYMENT TRUST'S RIGHT TO RECEIVE ANY LITIGATION PROCEEDS WILL BE
  SUBORDINATED TO THE CLAIMS OF SECURED CREDITORS OF BANK UNITED CORP. OR ITS
  SUCCESSORS AND THEIR SUBSIDIARIES IN ANY BANKRUPTCY OR INSOLVENCY PROCEEDING

    The payment trust's right to receive a portion of any forbearance litigation
proceeds from Bank United Corp. is a general unsecured senior obligation of Bank
United Corp. Therefore, that right will rank equally with all existing and
future senior unsecured indebtedness of Bank United Corp. and the payment trust
will not have any preferential right to any litigation proceeds in the event of
any bankruptcy or insolvency proceeding involving Bank United Corp. or
Washington Mutual, Inc., as its successor. In addition, because Bank United is
not a party to the commitment agreement, the payment trust's right to receive
that portion of any forbearance litigation proceeds payable to Bank United will
be subordinated to the liabilities of Bank United.

                                       8
<PAGE>
                                   THE TRUSTS

    The forbearance litigation is an asset of Bank United Corp. and Bank United
and thus will become an asset of Washington Mutual, Inc. as successor to Bank
United Corp. and as the parent company of Bank United upon completion of the
Washington Mutual merger. However, Bank United Corp. has established the rights
trust, a statutory business trust under Delaware law, which will issue rights
certificates representing the right to receive a portion of the assets of the
rights trust. These assets will consist primarily of the right to receive the
commitment amount from Bank United Corp.

    Under the declaration of trust for the rights trust and two related
litigation trustee agreements, Jonathon K. Heffron, Executive Vice President,
Chief Operating Officer and General Counsel of Bank United Corp., and Salvatore
A. Ranieri, a director of Bank United Corp., each of whom has knowledge of the
facts underlying the forbearance litigation, will be appointed as litigation
trustees of the rights trust. As the litigation trustees, Mr. Heffron and
Mr. Ranieri will have those rights described below under "The Forbearance
Litigation--Management of the Forbearance Litigation." Administration of the
rights trust, including transfers of rights certificates and receipt, holding
and payment of funds, will be conducted by the institutional trustee, which will
initially be First Union Trust Company, National Association. As required by
Delaware law, there will also be a Delaware trustee, which will also initially
be First Union Trust Company, National Association. Prior to the reorganization,
the declaration of trust for the rights trust will be amended so that it is
substantially the same as Appendix A.

    In addition, Bank United Corp. has formed the payment trust, which also will
be a Delaware statutory business trust. The payment trust was created to manage
the payment of any litigation proceeds from Bank United Corp. to the rights
trust. See "The Commitment Agreement: Payment Procedure."

                           THE FORBEARANCE LITIGATION

    GENERAL

    The following description of the forbearance litigation does not purport to
be a full or complete description of the legal or factual issues presented, the
court opinions rendered or the relevant law, and the description is in all
respects qualified by reference to the documents filed in connection with the
relevant litigation, opinions and law.

    As a result of Bank United Corp.'s original acquisition of certain of the
assets and liabilities of United Savings Association of Texas in 1988, the
Federal Home Loan Bank Board approved a forbearance letter issued on
February 15, 1989. Under the terms of the forbearance letter, the Federal
Savings and Loan Insurance Corporation agreed to waive or forbear from enforcing
certain regulatory provisions concerning capital requirements, liquidity
requirements, accounting requirements and other matters. After the enactment of
the Financial Institutions Reform Recovery and Enforcement Act of 1989, the
Office of Thrift Supervision took the position that the capital standards set
forth in the act applied to all savings institutions, including those
institutions that had been operating under previously granted capital and
accounting forbearances, and that the act eliminated those forbearances. While
Bank United has not had to rely on those forbearances or waivers to remain in
compliance with existing capital requirements as interpreted by the Office of
Thrift Supervision, the position of the Office of Thrift Supervision adversely
affected Bank United by curtailing the growth and reducing the leverage
contemplated by the terms of the forbearance letter. Bank United has been, and
continues to be, in compliance with regulatory capital provisions and,
accordingly, has not had to rely on the waivers or forbearances provided in
connection with the original acquisition.

    On July 25, 1995, Bank United Corp., Bank United and their then affiliate,
Hyperion Partners L.P., filed suit against the United States in the U.S. Court
of Federal Claims for alleged failures of the United States

                                       9
<PAGE>
    - to abide by a capital forbearance that would have allowed Bank United to
      operate for ten years under negotiated capital levels lower than the
      levels required by the then existing regulations or successor regulations,

    - to abide by its commitment to allow Bank United to count $110 million of
      subordinated debt as regulatory capital for all purposes and

    - to abide by an accounting goodwill treatment that would have allowed Bank
      United to count the $30.7 million difference between Federal Savings and
      Loan Insurance Corporation payment obligations to Bank United and the
      discounted present value of future payments as capital for regulatory
      purposes and to amortize that amount over a period of twenty five years.

    In March 1999, the U.S. Court of Federal Claims granted the plaintiffs'
motion for summary judgment on the issue of liability and held that the United
States was liable. On August 5, 1999, the court denied a motion for summary
judgment filed by the United States in which the United States asserted that the
plaintiffs' claims for lost profits damages were too speculative to permit
recovery. The case proceeded to trial on the amount of damages on September 13,
1999. The evidentiary phase of the damages case ended on October 21, 1999. The
parties submitted post-trial briefs followed by closing argument on February 7,
2000. The plaintiffs seek damages of up to $560 million. The government argued
that the damages to plaintiffs as a result of the breach, if any, were
speculative and approached zero.

    In July 1996, Bank United Corp. and Bank United entered into the recovery
agreement with Hyperion Partners L.P. acknowledging the relative value among the
parties of claims in the pending forbearance litigation. The agreement confirms
that Bank United Corp. and Bank United are entitled to receive 85% of the
amount, if any, recovered as a result of any settlement of or a judgment on
these claims and that Hyperion Partners is entitled to receive 15% of this
amount. The agreement was approved by the disinterested directors of Bank United
Corp. The plaintiffs are obligated to continue to cooperate in good faith and
will use their best efforts to maximize the total amount, if any, that they may
recover.

RELATED CASES

    The forbearance litigation is one of a number of cases filed against the
federal government in the U.S. Court of Federal Clams involving acquisitions of
failed savings institutions and alleging that changes in regulatory capital
calculation and capital regulations brought about by the Financial Institutions
Reform Recovery and Enforcement Act constitute a breach of the contract between
the acquiring institution and the federal government. Each of these cases
presents facts that are specific to the parties to the litigation, and the
plaintiffs in these cases allege diverse legal theories of damages. A small
number of cases have gone to trial, of which only a few have been decided. Each
of those cases is on appeal, and no appellate decisions have been issued with
respect to damages claims.

DAMAGES

    Each savings institution affected by the Financial Institutions Reform
Recovery and Enforcement Act and the applicable capital calculations and capital
regulations addressed the resulting reduction in its regulatory capital in its
own fashion based on the unique facts and circumstances faced by the
institution. Accordingly, the extent and amount of any damages awarded to the
institutions that have brought actions against the federal government is
expected to be fact specific. Even if plaintiffs in similar cases are successful
in securing damage awards, Bank United Corp. or Bank United may not obtain a
damage award.

    At the trial in the U.S. Court of Federal Claims, plaintiffs offered
evidence in support of three alternative damages models. The first model
calculated the plaintiffs' lost profits damages from the

                                       10
<PAGE>
government's three breaches of contract relating to capital levels, subordinated
debt, and goodwill. The damages calculated totaled $553,291,000. A second model
calculated lost profits damages arising solely from the breach of the
subordinated debt promise, which totaled $96,085,000. The third model calculated
what the cost of raising substitute capital in 1989 to repair the government's
three breaches would have been, which was calculated to be $117,227,000. In
addition to any recovery under the alternative models, the plaintiffs sought
recovery of $4,884,283 in out-of-pocket costs caused by the government's breach
of the subordinated debt promise.

    Although Bank United Corp. and Bank United have conducted reviews of the
damages suffered, no judicial determination has been made regarding the amount
or type of damages. The United States has argued in the plaintiff's case and in
similar cases that some or all of the damages alleged are too speculative to
permit recovery. The determination of damages in other cases may adversely
affect some or all of Bank United Corp.'s and Bank United's damage claims to the
extent they are decided prior to any determination in Bank United Corp.'s case.
In addition, rulings in other cases representing similar claims may also
adversely affect some or all of Bank United Corp.'s and Bank United's damage
claims. For these and related reasons, even though Bank United Corp. and Bank
United prevailed in establishing the liability of the United States at the trial
court level, there can be no assurance as to the amount, if any, and type of
damages that Bank United Corp. or Bank United may recover. Further, it is
possible that Bank United Corp. or Bank United may not obtain any monetary
recovery in the forbearance litigation.

MANAGEMENT OF THE FORBEARANCE LITIGATION

    GENERAL.  The litigation trustees will be Salvatore A. Ranieri, a director
of Bank United Corp., and Jonathon K. Heffron, Executive Vice President, Chief
Operating Officer and General Counsel of Bank United Corp., both of whom have
knowledge of the facts underlying the forbearance litigation. Messrs. Ranieri
and Heffron have been involved in the prosecution of the litigation to date.
Under the declaration of trust for the rights trust and the litigation trustee
agreements, the litigation trustees will have the sole and exclusive right to
instruct Bank United Corp. and Bank United, and their successors, with respect
to all decisions regarding the prosecution of the litigation. This right
includes the right to direct Bank United Corp. to dismiss, settle or cease
prosecuting the forbearance litigation and to control other aspects of the
litigation, such as hiring, firing and supervising legal counsel, Bank United
Corp. will cause Bank United and its successors to follow these instructions.
Prior to the Washington Mutual merger, Bank United Corp. may establish an
advisory committee for the rights trust composed of present and former directors
of Bank United Corp. with which the litigation trustees may consult.

    The declaration of trust for the rights trust will provide that the
litigation trustees will have the right to instruct Bank United Corp. and Bank
United, and their successors, to dismiss, settle or cease prosecution of the
forbearance litigation at any time and on any terms for any reason whatsoever.
However, the litigation trustees may not cause Bank United Corp. or Bank United
to enter into any settlement agreement or other ruling or agreement as part of
the resolution of the litigation or a related Internal Revenue Service ruling if
the agreement imposes any liability or obligation on Bank United Corp. or any of
its affiliates or adversely affects or restricts the conduct of its business or
adversely affects its tax posture with respect to other matters, other than a
standard settlement release relating only to the forbearance litigation or other
related claims that the plaintiffs could have brought immediately prior to the
Washington Mutual merger.

    The litigation trustee agreements will provide that the rights trust will
compensate each litigation trustee, during the term of his service as a
litigation trustee, at a rate of $500,000 per year for three years, except that
if the forbearance litigation is terminated in less than three years, the
remainder of the fees that would be paid over the three-year period will be
accelerated upon final resolution of the litigation and receipt by Bank United
Corp. or any of its affiliates of the litigation proceeds. The litigation
trustees will also be entitled to reimbursement of all reasonable out-of-pocket
expenses.

                                       11
<PAGE>
    In addition, as an incentive to the litigation trustees, each of them will
receive rights certificates representing 0.75% of the total outstanding rights
certificates issued in the reorganization. In addition, on December 19, 2000,
the record date for the reorganization, Messrs. Heffron and Ranieri beneficially
own 33,826 and 431,000 shares of Bank United Corp. common stock, respectively
and 3,000 and 190,112 options to purchase shares of Bank United Corp. common
stock, respectively, all of which will have vested after completion of the
Washington Mutual merger. If the reorganization had occurred on the record date,
Messrs. Heffron and Ranieri would have received 33,826 and 431,000 rights
certificates, respectively, in respect of the shares of Bank United Corp. common
stock they beneficially owned on that date, and 190,112 and 3,000 rights
certificates, respectively, would be issuable in connection with the exercise of
Bank United Corp. options they beneficially owned on that date.

    The number of rights certificates actually received by each litigation
trustee will depend upon the number of shares of Bank United Corp. common stock,
Bank United Corp. stock options and Bank United Corp. 8% Premium Income Equity
Securities that the litigation trustee holds (if any) prior to the
reorganization. That number may be different than the number given as of the
record date.

    The terms of the declaration of trust for the contingent payment rights
trust will require there to be at least two litigation trustees at all times. If
a litigation trustee resigns, dies, becomes incapacitated, or is no longer
qualified, the remaining litigation trustee will appoint a successor litigation
trustee who will receive fees as determined by the other litigation trustee.
Those fees will not exceed the fees payable to the initial litigation trustees.

    AUTHORITY.  The declaration of trust for the rights trust will provide that
the litigation trustees may adopt their own rules and procedures, but may act
only with the approval of both litigation trustees or the sole remaining
litigation trustee then in office. If the number of litigation trustees is
increased above two, then approval of the litigation trustees requires the
affirmative vote of a majority of the litigation trustees then in office. The
litigation trustees may, in their discretion, delegate to one or more of the
litigation trustees the authority to act on behalf of the litigation trustees
except regarding the retention or dismissal of counsel for Bank United Corp. or
the litigation trustees or the approval of a settlement or dismissal of the
forbearance litigation.

                  THE COMMITMENT AGREEMENT: PAYMENT PROCEDURE

    Prior to the reorganization, Bank United Corp., the rights trust and the
payment trust will enter into the commitment agreement, which will be
substantially the same as Appendix C. Upon completion of the Washington Mutual
merger, Washington Mutual, Inc. will assume the rights and obligations of Bank
United Corp. under the commitment agreement. Under the terms of the commitment
agreement, Bank United Corp. will be obligated to pay to the payment trust from
time to time an amount equal to the commitment amount plus interest less taxes
on that interest. The commitment amount will be equal to

    - all cash and non-cash proceeds actually received by Bank United Corp. and
      its affiliates (other than Hyperion Partners) under a final, nonappealable
      judgment or a final settlement of the forbearance litigation,

    - less reimbursements to Bank United Corp.,

    - plus any assumed tax benefits to Bank United Corp.

    The reimbursements that Bank United Corp. may subtract from the litigation
proceeds are as follows:

    - amounts paid by Bank United Corp. to the expense fund described below
      under the commitment agreement, plus interest,

                                       12
<PAGE>
    - Bank United Corp.'s assumed income tax liability resulting from the
      receipt of the litigation proceeds,

    - damages actually suffered by Bank United Corp. and related parties as a
      result of

        -- any matter whatsoever brought by the holders of the rights
          certificates in their capacity as holders or

        -- any matter brought by another party relating to the trusts, the
          rights certificates and their distribution, the forbearance litigation
          and any actions taken by the litigation trustees relating to the
          trusts other than any damages arising from Bank United Corp.'s breach
          of the commitment or other agreements described in this prospectus,
          failure to deliver rights certificates when due or failure to deposit
          trust expenses advanced to the trusts;

    - interest on any cash payment of taxes if proceeds are included in income
      of Bank United Corp. or Bank United for federal income tax purposes in a
      taxable year prior to the year such proceeds are received in cash,

    - any indemnification amounts provided to the litigation trustees under the
      litigation trustee agreements, and

    - expenses reasonably incurred by Bank United Corp. in connection with the
      liquidation of any non-cash proceeds.

    The payment trust will pay any amounts it receives from Bank United Corp.
promptly to the rights trust after deducting any amounts withdrawn by Bank
United Corp. to cover taxes arising solely from its ownership of the payment
trust. The amount that the payment trust forwards to the rights trust will be
increased by any after tax interest earned on the commitment amount. However, in
the event that Bank United Corp. pays any portion of the commitment amount to
the payment trust within 365 days of the reorganization, the payment trust will
not pay those amounts to the payment trust until the expiration of 366th day
following the reorganization. The payment trust will be controlled by the
trustees. Prior to the Washington Mutual merger the declaration of trust for the
payment trust will be amended so that it is substantially the same as
Appendix B.

    The rights trust will in turn make payment to the rights certificate holders
as described below under "Description of the Rights Certificate."

                                       13
<PAGE>
                     DESCRIPTION OF THE RIGHTS CERTIFICATES

GENERAL

    Each rights certificate will represent a beneficial interest in the assets
of the rights trust. As a result of Bank United Corp. entering into the
commitment agreement, each rights certificate will entitle the holder of the
rights certificate to receive a fraction (equal to 1 divided by the total number
of rights certificates then outstanding) of any payment amount within 60 days of
receipt by the rights trust of that amount. Holders of rights certificates will
also be entitled to the same fractional share of the retained amount (as defined
below) at the expiration of the retained amount period. The payment amount will
be equal to the amount received from the payment trust.

    - less the amount of any accrued but unpaid expenses payable by the rights
      trust, but

    - plus any interest or income received by the rights trust on the proceeds
      amount.

    In addition, this amount will be reduced by the retained amount, which is
$1.0 million or such greater amount as the litigation trustees reasonably
determine to be necessary to cover all expenses and claims of the rights trust
which may be incurred or arise after amounts payable by Bank United Corp. to the
trusts under the commitment agreement have been paid in full and to satisfy the
rights trust's indemnification obligations. The retained amount will be retained
for a period of one year or longer as reasonably determined by the litigation
trustees. The rights trust will invest the retained amount in designated types
of investments until the expiration of the retained amount period, subject to
use of those funds to pay trust expenses.

RESALES OF RIGHTS CERTIFICATES

    The rights certificates will be freely transferable by the holders of the
certificates under the Securities Act, except for certificates issued to any
holders of rights certificates who may be considered "affiliates" of the rights
trust for purposes of Rule 145 under the Securities Act as of the date of the
special meeting of stockholders of Bank United Corp. These affiliates may not
sell their certificates except under an effective registration statement under
the Securities Act or other applicable exemption from the registration
requirements of the Securities Act.

TRADABILITY

    The declaration of trust for the rights trust will require the rights trust
to use its reasonable best efforts to permit trading of the rights certificates
on the Nasdaq National Market (or, if it is not possible to do so, to trade on
another market). Bank United Corp., on behalf of the rights trust, will promptly
apply for inclusion of the rights certificates on the Nasdaq National Market
under the symbol "BNKUZ."

PAYMENT PROCEDURES FOR RIGHTS CERTIFICATES

    The declaration of trust for the rights trust will provide that if and when
Bank United Corp. or any of its affiliates receive any litigation proceeds Bank
United Corp. will deliver to the trustees a written notice regarding the
proceeds within ten days of receipt of those proceeds. Within 30 days of receipt
of those litigation proceeds, Bank United Corp. will send to the litigation
trustees a certificate setting forth the calculation of the portion of the
commitment amount with respect to those litigation proceeds. The rights trust
will then have 30 days to agree or dispute that calculation. If the trust agrees
to the calculation during that period by delivering a notice of agreement or by
failing to object, Bank United Corp. must deliver to the payment trust that
portion of the commitment amount within five business days of delivery of the
notice of agreement or expiration of the period without any objection. If the
rights trust disputes Bank United Corp.'s calculation of that portion of the
commitment amount, it must prepare a certificate setting forth its calculation
as well as supporting documentation. If Bank

                                       14
<PAGE>
United Corp. disagrees with that calculation, Bank United Corp. and the trust
will hire a mutually agreed upon independent certified public accountant to
recompute that portion of the commitment agreement and determine the correct
amount. Within five business days of a resolution of the portion of the
commitment amount then payable, Bank United Corp. must pay that amount to the
payment trust.

TIMING OF PAYMENTS

    Under the declaration of trust for the rights trust and the commitment
agreement, the rights trust will make payments of the payment amount to the
holders of rights certificates as of the record dates determined by the
litigation trustees. Payment of the payment amount will be made on the payment
dates, which will also be set by the litigation trustees, and which will be
within 60 days after the rights trust receives a payment from the payment trust
under the commitment agreement. Within 90 days of expiration of the retained
amount period, the rights trust will pay any remaining portion of the retained
amount to the holders of the rights certificates.

EXPENSES AND RETAINED AMOUNT

    The rights trust may issue additional rights certificates after the
effective time of the Washington Mutual merger to raise funds to pay expenses.
The rights trust will be authorized to borrow additional funds for the sole
purpose of funding its expenses, subject to certain limitations. If the rights
trust accrues expenses in excess of Bank United Corp's. funding obligations, it
will deduct the amount of those expenses from the proceeds amount in order to
calculate the payment amount.

    Under the commitment agreement, at the request of the rights trust or the
payment trust, Bank United Corp. must provide the trusts with funds to pay their
expenses. The aggregate amount that Bank United Corp. will be obligated to pay
for the life of the trusts will not exceed $10 million, unless the forbearance
litigation is pursued through additional trial court proceedings and appeals, in
which case Bank United Corp. will be obligated to pay those additional expenses
subject to a maximum of $13 million. In the commitment agreement, each of the
trusts will agree that, immediately prior to its termination, it will refund to
Bank United Corp. any amount provided to it in the expense fund but not used,
provided that each of the trusts may retain a reasonable reserve of funds to pay
for termination expenses.

                THE COMMITMENT AGREEMENT: ADDITIONAL INFORMATION

TAX EFFECTS ON THE COMMITMENT AMOUNT

    The commitment agreement will provide that the commitment amount will be
decreased by certain tax liabilities to Bank United Corp. and increased by
certain tax benefits to Bank United Corp.

    TAX LIABILITIES.  The commitment agreement will provide that tax liabilities
include an amount equal to the income tax liability of Bank United Corp. and its
affiliates on the litigation proceeds computed as described below. Regardless of
any position taken by Bank United Corp. or its affiliates on any tax return or
claim for refund or of the actual payment or receipt of any taxes of those
proceeds, the tax liabilities will be computed based on the tax assumptions
described below unless it is determined that litigation proceeds are not
includible in gross income in whole or in part, in which case the assumptions
will be modified based on that determination.

    ASSUMED TAX BENEFITS.  The commitment agreement will provide that tax
benefits include an amount equal to the sum of

    - the assumed tax benefit resulting from the payment of the portion of the
      commitment amount that will be treated as interest and

                                       15
<PAGE>
    - the assumed tax benefit resulting from the deduction for the payment of
      the trust expenses and for the value of the rights certificates issued to
      the trustees.

    The assumed tax benefit under the first bullet point above will be computed
based on the tax assumptions described below unless it is determined that no tax
deduction is permitted (or any tax deduction is limited) for payments of the
commitment amount, in which case the assumed tax benefits will be modified based
on that determination

    The assumed tax benefit under the second bullet point above will be computed
based on the tax assumptions described below unless it is determined that a tax
deduction is allowed (in whole or in part) for expense advances to the trusts or
for the fair market value of the rights certificates issued to the trustees, in
which case the assumed tax benefits will be modified based on that
determination.

    TAX ASSUMPTIONS.  In the commitment agreement, "tax assumptions" will mean
the following assumptions unless a determination is made as described above, in
which case the assumptions will be modified as required by that determination:

    - The litigation proceeds will be fully includible in Bank United Corp.'s
      gross income as ordinary income.

    - Payments of the commitment amount generally will not be tax deductible
      except that payments of the commitment amount will be deductible to the
      extent treated under Section 483(a) of the Internal Revenue Code as
      interest expense except to the extent allocable to rights certificates
      issued upon the exercise of stock options and other limited exceptions.

    - Bank United Corp. and its affiliates will not be entitled to deduct
      estimated expense amounts advanced to the trusts under the commitment
      agreement or for the fair market value of the rights certificates issued
      to the litigation trustees under the litigation trustee agreements.

    - The income tax liability resulting from the inclusion of all or a portion
      of the litigation proceeds in Bank United Corp.'s gross income as ordinary
      income and the benefit of any tax deduction will be:

       --  the product of (1) the amount of that income or deduction and (2) the
           highest statutory rate of federal income tax applicable to
           corporations for the year in which the income is assumed to be
           included or the deduction is assumed to be realized, plus

       --  the product of (1) that income or deduction and (2) the net combined
           marginal rate of state and local income (or franchise) tax of the
           relevant Bank United Corp. affiliate for the year in which the income
           is assumed to be included and the deduction is assumed to be
           realized, net of the federal income tax benefit (calculated based on
           the federal income tax rate described above) of such state or local
           income (or franchise) tax.

    RECONCILIATION PAYMENTS.  The commitment agreement will provide that, in the
event that any assumed tax liability or any assumed tax benefit cannot be
calculated at the time of the receipt of the cash proceeds of the litigation or
the payment of the commitment amount, the commitment amount must be paid based
on an estimated calculation of any assumed tax benefit or assumed tax liability.
The commitment agreement will further provide that 12 months after the end of
the taxable year in which the commitment is paid based on the estimated
calculation, the parties will recompute the assumed tax benefit or assumed tax
liability. No later than 30 days after the recomputation of the assumed tax
liability and the assumed tax benefit, Bank United Corp. will pay to the payment
trust any excess of the re-computed commitment amount over the commitment amount
that was initially calculated, plus interest for the period over which the
payment was deferred at a rate of Bank United Corp.'s cost of funds as submitted
monthly to the Federal Home Loan Bank.

                                       16
<PAGE>
INDEMNIFICATION AND RELATED OBLIGATIONS; LIABILITY

    INDEMNIFICATION.  Under their declarations of trust, the trusts will
indemnify and advance expenses to each litigation trustee, the institutional
trustee, and the Delaware trustee and members of any advisory committee
resulting from any threatened or actual proceeding arising out of or relating
to:

    - the trust,

    - the rights certificates,

    - the distribution of the rights certificates,

    - the forbearance litigation,

    - any acts or omissions of the trustees in their capacity or purportedly in
      their capacity as trustees, or

    - actions taken by the litigation trustees (including actions taken by the
      litigation trustees in their capacity as officers, directors or agents of
      Bank United Corp. or Washington Mutual, Inc. so long as those actions
      relate to the rights trust).

    In the circumstances listed above, these persons will be indemnified against
any and all damages and expenses, including attorneys' fees and other expenses
incurred by the indemnified person in obtaining indemnification under the
declaration of trust.

    However, in the case of the indemnification of any litigation trustee, if
the rights certificate holders establish in a final judicial determination by
clear and convincing evidence that the damages arose as the result of actions or
omissions of the litigation trustees with deliberate intent to injure the rights
certificate holders or with reckless disregard for the best interests of those
holders, no indemnification will apply. Moreover, in the case of the
indemnification of the Delaware trustee or the institutional trustee, if rights
certificate holders establish in a final and nonappealable judicial
determination by clear and convincing evidence that the damages arose because
such trustee was grossly negligent or engaged in willful misconduct, then no
indemnification will be permitted. Under Delaware law, parties generally cannot
agree to eliminate liability for acts or omissions involving gross negligence or
willful misconduct. The termination of any proceeding will not, of itself,
create a presumption that the litigation trustees acted or decided with
deliberate intent to injure the certificate holders or with reckless disregard
for the best interests of such holders or that the Delaware trustee or
institutional trustee was grossly negligent or engaged in willful misconduct.

    LIABILITY INSURANCE.  The trusts will obtain liability insurance to cover
their indemnification obligations and any liabilities of the litigation
trustees.

    REIMBURSEMENT OBLIGATIONS.  Under the commitment agreement, Bank United
Corp. and its affiliates will be reimbursed from any litigation proceeds
received by Bank United Corp. for any damages actually suffered by them arising
from claims:

    - brought by the holders of the rights certificates in their capacity as
      holders regarding any matter whatsoever, or

    - regarding any matter relating to the trusts, the rights certificates and
      their distribution, the forbearance litigation and any actions taken by
      Bank United Corp. relating to the trusts.

    However, Bank United Corp. will not be reimbursed for damages arising from
claims

    -  against Bank United Corp. for

       --  breach of the commitment agreement, the litigation trustee
           agreements, the declarations of trust or the merger agreement
           relating to the Washington Mutual merger,

                                       17
<PAGE>
       --  failure to deliver any rights certificates when due,

       --  failure to deposit the trust expenses advanced to the trust, or

    - against Bank United for breach of any depository relationship obligations
      regarding estimated trust expenses advanced to the trusts.

    LIABILITY OF CERTIFICATE HOLDERS AND TRUSTEES.  In accordance with Delaware
law, rights certificate holders will be entitled to the same limitation of
personal liability extended to stockholders of for-profit private corporations
organized under the Delaware General Corporation Law.

    The declarations of trust for the trusts will provide that, except as set
forth in those documents, the trustees will not be personally liable for the
payment of any amounts to the trusts or rights certificate holders. Those
payments will be made solely from any proceeds amount, retained amount, and
other assets of the contingent payment rights trust.

    EXCULPATION.  The declarations of trust for the trusts will provide that, to
the fullest extent permitted by law, none of the trustees, their affiliates or
the members of any advisory committee will be liable to the trust or to each
other for any damages incurred because of any act or omission by that person.
However, the declarations of trust will provide for two exceptions to that
limitation:

    - The litigation trustees will be liable for any damage incurred because of
      any act or omission by them if it shall be established in a final and
      nonappealable judicial determination by clear and convincing evidence that
      any such act or omission of the litigation trustees was undertaken with
      deliberate intent to injure the rights certificate holders or with
      reckless disregard for the best interests of such holders and, in any
      event, any liability will be limited to actual, non-speculative damages.

    - The institutional trustee or the Delaware trustee shall be liable for any
      such loss, damage or claim incurred by reason of the its gross negligence
      or willful misconduct with respect to such acts or omissions and, in any
      event, any liability will be limited to actual, non-speculative damages.

    These provisions are not intended to limit the litigation trustees' right to
insurance obtained by the contingent payment rights trust and the proceeds of
that insurance.

    The declarations of trust for the trusts will also provide that, to the
fullest extent permitted by law, none of the trustees, their affiliates or the
members of any advisory committee will have any liability to the trusts, the
trustees or the rights certificate holders.

    The declarations of trust for the trusts will also provide that, to the
fullest extent permitted by law, none of trusts, the trustees or the rights
certificate holders will have the right to bring any action against any trustee,
any of their affiliates or any member of the Bank United Corp. litigation
committee relating to:

    - the formation of the trusts,

    - entering into of the commitment agreement,

    - the distribution of the rights certificates,

    - the maintenance of the forbearance litigation at the direction of the
      litigation trustees, or

    - the actions of the litigation trustees in their capacity (or purportedly
      in their capacity) as litigation trustees.

    However, the trusts (or the litigation trustees on its behalf) may bring
actions against:

    - Bank United Corp. for breach of its obligations under the declarations of
      trust,

                                       18
<PAGE>
    - Bank United Corp. for breach of any of its obligations under the
      commitment agreement or Bank United Corp.'s failure to deliver any rights
      certificate when due,

    - Bank United Corp. for failure to make payments to the trusts under the
      commitment agreement, or

    - Bank United for breach of any depository relationship obligations it may
      have with respect to payments made by Bank United Corp. to the trusts,

and in each case, Bank United Corp. or Bank United, as the case may be, may be
liable to the trusts in connection with such action.

    Fees and expenses incurred by Bank United Corp. or its affiliates in an
action of the sort described in the preceding paragraph shall not be set off
against the litigation proceeds when calculating the commitment amount if the
trust or the litigation trustees wins the suit. If the litigation trustees do
not win a suit of that sort, those fees and expenses will be considered expenses
of the trusts.

    OTHER LIMITATION ON RIGHTS OF RIGHTS CERTIFICATE HOLDERS.  The declaration
of trust for the rights trust will provide that no rights certificate holder
will have the right to bring any action against the litigation trustees to
enforce or otherwise act regarding the declaration of trust unless the holder
has previously given written notice to the litigation trustees of the substance
of the dispute. In addition, the holders of at least a majority of the
outstanding rights certificates must give written notice to the parties of their
support for the institution of the action to resolve the dispute. Rights
certificate holders may have the right to institute and maintain certain
derivative actions under Section 3816 of the Delaware Business Trust Act.

    The commitment agreement will provide that except as set forth in the two
declarations of trust, the commitment agreement, the litigation trustee
agreements or the merger agreement for the Washington Mutual merger, Bank United
Corp. will have no other obligations to the trusts, the litigation trustees or
the holders of rights certificates.

    The declaration of trust for the rights trust will provide that the rights
certificate holders will have no voting rights (except the rights described in
the following two sentences), no liquidation preference and no rights to
dividends or distributions other than the amounts described in this prospectus.
The declaration of trust for the rights trust will provide that amendments to
the declaration of trust must be approved by a majority of the holders of rights
certificates outstanding. No vote will be required, however, and the declaration
of trust may be amended by the institutional trustees and a majority of the
litigation trustees without a vote, to

    - cure any ambiguity;

    - correct or supplement any provision in the declaration of trust that may
      be defective or inconsistent with any other provision of the declaration
      of trust;

    - add to the covenants, restrictions or obligations of the litigation
      trustees or to alter the allocation of duties between the litigation
      trustees and the institutional trustee;

    - modify, eliminate or add to any provision of the declaration of trust to
      ensure that the rights trust

       --  will be classified for U.S. federal income tax purposes at all times
           as a grantor trust,

       --  will not be required to register as an "investment company" under the
           Investment Company Act of 1940, or

       --  is able to issue additional rights certificates.

                                       19
<PAGE>
    In addition, the holders of a majority of the outstanding rights
certificates may remove either the institutional trustee or the Delaware trustee
with cause or, if the rights trust is in default of its payment obligations,
with or without cause. The holders of the rights certificates will have no
rights to elect, remove or replace the litigation trustees.

RESTRICTIONS ON THE CONDUCT OF BANK UNITED CORP.

    The terms of the commitment agreement will provide that Bank United Corp.
will not, and will not permit Bank United to, assign any interest in the
forbearance litigation. In the commitment agreement, the parties will
acknowledge that any merger of Bank United Corp. or Bank United with any other
party will not result in an assignment of the forbearance litigation.

    The commitment agreement will provide that Bank United Corp. will not

    - sell or otherwise dispose of any shares of any series of voting stock of
      Bank United or

    - permit Bank United to issue, sell or otherwise dispose of shares of its
      voting stock

    - unless in either case Bank United remains a controlled subsidiary of Bank
      United Corp.

    The commitment agreement will also provide that Bank United Corp. will not
permit Bank United to

    - merge with another entity unless it or a controlled subsidiary of Bank
      United Corp. will be the surviving entity in the merger or

    - convey or transfer substantially all of its properties and assets to any
      person other than Bank United Corp. or a controlled subsidiary of Bank
      United Corp.

    The commitment agreement will also contain provisions designed to provide
that Bank United Corp. will not create any mortgage or other encumbrance on the
voting stock of Bank United as security for indebtedness for borrowed money
without providing that the rights certificates will be secured equally with, or
prior to, that indebtedness. However, Bank United Corp. will be permitted to
create any mortgage or other encumbrance without regard to those restrictions so
long as after giving effect to that mortgage or other encumbrance Bank United
Corp. will own directly or indirectly at least 80% of the voting stock of Bank
United then issued and outstanding, free and clear of the mortgage or other
encumbrance.

    The commitment agreement will also provide that Bank United Corp. may avoid
the restrictions described in the two previous paragraphs if prior to any
transaction of that type:

    - Bank United has unconditionally guaranteed payment of the commitment
      amount, if any, when due;

    - Bank United has obtained all regulatory approvals, if any, required to
      permit the guarantee of the payment of the commitment amount; and

    - Bank United Corp. has delivered to the institutional trustee an opinion of
      counsel stating that Bank United Corp. has properly entered into the
      guarantee of the payment of the commitment amount and the guarantee
      constitutes an enforceable obligation of Bank United.

                  THE BANK UNITED CORP. REORGANIZATION AND THE
                      DISTRIBUTION OF RIGHTS CERTIFICATES

    Bank United Corp. and Washington Mutual, Inc. entered into an agreement and
plan of merger dated August 18, 2000, under which Bank United Corp. will merge
with and into Washington Mutual, Inc., with Washington Mutual, Inc. surviving
the merger. Immediately prior to the Washington Mutual merger, Bank United Corp.
will effect a reorganization of itself by merging a wholly owned subsidiary of
Bank United Corp. with and into Bank United Corp. As a result of this
reorganization,

                                       20
<PAGE>
each share of Bank United Corp. common stock outstanding at the time of the
reorganization will be converted to a new share of Bank United Corp. common
stock and the right to receive one rights certificate, and Bank United Corp.'s
other outstanding equity-based securities will be appropriately and
proportionately adjusted. The rights trust will issue to Bank United Corp. the
rights certificates prior to the reorganization.

    Bank United Corp. will retain the number of rights certificates that is
equal to (1) the number of shares underlying Bank United Corp. stock options
outstanding immediately prior to the reorganization for delivery upon the
exercise of stock options by the holder of the applicable stock option or upon
the election by the holder of the applicable stock options to surrender all or
part of the stock option for a combination of cash and rights certificates as
provided under the Bank United Corp. stock plan under which the applicable
option was issued and (2) the number of rights certificates required to satisfy
Bank United Corp.'s obligations under the litigation trustee agreements with
respect to compensation of the litigation trustees. See "The Forbearance
Litigation--Management of the Forbearance Litigation."

    In addition, Bank United Corp. will hold one rights certificate per share of
Bank United Corp. common stock associated with Bank United Corp. 8% Premium
Income Equity Securities that may be issued in accordance with the terms of
those securities. Upon completion of the reorganization and the merger with
Washington Mutual, Inc., the number of rights certificates that will be issuable
with respect to each $50 purchase contract under the Bank United Corp. Bank
United Corp. 8% Premium Income Equity Securities will be between 1.1130 and
1.3356 rights certificates, depending upon the average closing price per share
of Washington Mutual, Inc. common stock for the 20 trading days ending on the
third trading day before August 16, 2002.

    Each rights certificate distributed by the contingent payment rights trust
to each Bank United Corp. stockholder will be automatically redeemed for $0.01
in cash immediately following the reorganization if the holder of the share as
to which the certificate was issued has given notice under Section 262 of the
Delaware General Corporation Law of an intent to exercise appraisal rights. If
any notifying stockholder subsequently withdraws or loses its right under
Delaware law to appraisal, Bank United Corp. will deliver to the stockholder
rights certificates equal to the number of Bank United Corp. shares as to which
the appraisal demand was withdrawn or lost.

    Prior to its reorganization, Bank United Corp. will deposit, with a
depository institution selected to act as an exchange agent, the rights
certificates for the benefit of the holders of Bank United Corp. common stock.
The exchange agent will cause the certificates to be delivered to the holders of
Bank United Corp. common stock as soon as practicable after the reorganization.
Up to approximately 38.9 million rights certificates are expected to be issued
as a result of the reorganization and the compensation of the litigation
trustees.

                    MATERIAL FEDERAL INCOME TAX CONSEQUENCES

    The following summary of the material U.S. federal income tax consequences
of the holding and sale of rights certificates applies to holders of Bank United
Corp. common stock who receive the rights certificates in the reorganization and
hold them as capital assets. The discussion may not apply to certain classes of
taxpayers, including foreign holders, insurance companies, tax-exempt
organizations, financial institutions, dealers in securities, traders in
securities that elect to apply a mark-to-market method of accounting, persons
who hold the certificates in a hedging transaction or as part of a straddle or
conversion transaction and persons to whom the certificates are issued on the
exercise of employee options or otherwise in a transaction that is not a sale or
exchange.

    THERE ARE NO AUTHORITIES CONSIDERING THE TAX TREATMENT OF INSTRUMENTS THAT
ARE SUBSTANTIALLY THE SAME AS THE RIGHTS CERTIFICATES. AS A RESULT, THEIR TAX
TREATMENT IS SOMEWHAT UNCERTAIN, AND COULD DIFFER FROM THE TREATMENT DESCRIBED
IN THIS DOCUMENT. THIS TAX TREATMENT MAY NOT APPLY TO ALL BANK UNITED

                                       21
<PAGE>
CORP. STOCKHOLDERS, INCLUDING THOSE STOCKHOLDERS WHO DISSENT FROM THE
REORGANIZATION. DETERMINING THE ACTUAL TAX CONSEQUENCES OF THE TRANSACTIONS TO
YOU CAN BE COMPLICATED. THEY WILL DEPEND ON YOUR SPECIFIC SITUATION AND ON
VARIABLES NOT WITHIN THE CONTROL OF BANK UNITED CORP., WASHINGTON MUTUAL, INC.
OR THE TRUST. YOU SHOULD CONSULT YOUR OWN TAX ADVISOR FOR A FULL UNDERSTANDING
OF THE TAX CONSEQUENCES OF THE TRANSACTION TO YOU.

    This summary is the opinion of Wachtell, Lipton, Rosen & Katz, special
counsel to Bank United Corp. The parties do not intend to request any ruling
from the Internal Revenue Service as to the U.S. federal income tax treatment of
the rights certificates or contingent payment rights trust.

    The reorganization and the Washington Mutual merger have been structured in
a manner so as to qualify as a "reorganization" within the meaning of Section
368(a) of the Internal Revenue Code, and it is a condition to the obligations of
both Bank United Corp. and Washington Mutual to complete the Washington Mutual
merger that they receive opinions of legal counsel that the merger will qualify
as a "reorganization." As a result, Bank United Corp. stockholders who exchange
their shares of Bank United Corp. common stock for new shares of Bank United
Corp. common stock and rights certificates in the reorganization and then
exchange those new shares of Bank United Corp. common stock for shares of
Washington Mutual common stock in the Washington Mutual merger will recognize
gain, but not loss, in the exchange. The gain, if any, that is recognized in the
exchange will be equal to the lesser of:

    - the fair market value of the rights certificates received in the
      reorganization or

    - the amount of gain realized in the exchange.

The amount of gain realized in the exchange will equal the excess of:

    - the sum of the fair market value of the rights certificates and the fair
      market value of the Washington Mutual common stock received in the
      exchange over

    - the tax basis of the shares of Bank United Corp. common stock exchanged.

CHARACTERIZATION OF THE RIGHTS CERTIFICATES AND TRUST

    It is anticipated that the rights trust will be treated as a grantor trust
for federal income tax purposes and, therefore, each holder of a rights
certificate

    - will be treated as the owner of a pro rata share of the rights trust's
      assets and

    - will be treated as receiving any amounts received by the rights trust at
      the same time those amounts are received by the rights trust.

Accordingly, depending upon a holder's basis in its interest in the assets of
the rights trust, a holder may realize income attributable to its interest in
the payments received by the rights trust without regard to whether those
payments have been distributed to that holder.

    For federal income tax purposes, the rights trust intends to treat the
expense fund as an asset of Bank United Corp. and to treat any amounts paid out
of the expense fund as expenditures of Bank United Corp. that do not affect the
rights trust. In the absence of a change in law, the rights trust will file
returns and report to holders of rights certificates in a manner consistent with
this intention. It is a condition to Bank United Corp.'s obligation to
consummate the Washington Mutual merger that it receive an opinion of Wachtell,
Lipton, Rosen & Katz, dated the closing date of the Washington Mutual merger,
that the contingent payment rights trust will not itself be subject to any
material federal income tax.

                                       22
<PAGE>
    Income of the rights trust will include income attributable to the
commitment as well as income from the temporary investment of proceeds of the
commitment by the rights trust (including proceeds that are retained by the
rights trust as part of the retained amount).

CHARACTERIZATION OF THE COMMITMENT; SECTION 483

    The rights trust intends to treat the payments made under the commitment, to
the extent attributable to rights certificates as payments under a contract for
the sale or exchange of Bank United Corp. common stock that are subject to
Section 483 of the Internal Revenue Code and not as a debt instrument for
purposes of the original issue discount provisions of the Internal Revenue Code.

    Under Section 483 of the Internal Revenue Code, a holder of a rights
certificate will not be required to include any amount in income until payments
on the commitment are received by the rights trust (or in some circumstances
described below, until the right to those payments becomes fixed), or the rights
certificate is sold. When a payment is received on the commitment or a rights
certificate is sold, a portion of the amount received will be treated under
Section 483 as interest income. Interest income will be ordinary income to the
holder. The portion that will be treated as interest will equal the amount
received minus its present value as of the effective date of the Washington
Mutual merger based on a discount rate equal to the applicable federal rate. The
applicable federal rate is a rate reflecting an average of market yields on
Treasury debt obligations for different ranges of maturities that is published
monthly by the Internal Revenue Service. The relevant applicable federal rate
will be the lower of

    - the lowest applicable federal rate in effect during the 3-month period
      ending with the month which includes the date on which the agreement was
      signed or

    - the lowest applicable federal rate in effect during the 3-month period
      ending with the month which includes the effective date of the Washington
      Mutual merger.

In either case, the maturity range of the relevant applicable federal rate will
correspond to the period from the effective date of the Washington Mutual merger
to the date the amount is received or deemed received. Where a payment is due
more than six months after the payment has been fixed:

    - the payment will be discounted to the date when it became fixed, using a
      discount rate equal to the applicable federal rate that would apply as of
      the time the fixed payment is due,

    - the discount on the deferred payment is treated as interest accruing over
      the period of deferral and

    - the discounted amount is divided between interest and principal under
      Section 483 as if it were paid in cash on the date it became fixed.

The Section 483 interest must be included in income by a holder under its
regular method of accounting (E.G., the accrual method or the cash method).

    The calculation of interest income realized by a holder under Section 483
does not depend on the period for which the holder has held its rights
certificates. Accordingly, a holder who buys rights certificates after the
reorganization may be treated as receiving interest under Section 483 that
includes interest for the period from the effective date of the reorganization
to the date of the holder's purchase of the rights certificates. Although there
are no specific rules addressing the issue under current law, it is reasonable
to assume that a purchaser of rights certificates would be permitted to treat
the portion of the purchase price that is treated as interest to the seller
under Section 483 as a payment of accrued interest that may be offset against
the portion of any amount received by the purchaser that is treated as interest
under Section 483.

                                       23
<PAGE>
SALE OF RIGHTS CERTIFICATES

    Upon a sale of a rights certificate, a holder will recognize gain or loss
equal to the difference between the amount realized on the sale, net of imputed
interest under Section 483 as described above, and the holder's adjusted tax
basis in the rights certificate. Any such gain or loss will be treated as
capital gain or loss. This gain or loss will be long-term gain or loss if the
holder has held the rights certificates for more than one year. Long-term
capital gain of a non-corporate holder is generally subject to a maximum tax
rate of 20%.

RECEIPT OF PAYMENTS ON THE COMMITMENT

    When a payment is received on the commitment by the rights trust, a holder
of rights certificates will recognize gain equal to the difference between the
amount of the payment allocated to the rights certificates, net of imputed
interest under Section 483 as described above, and the portion of the holder's
basis in the certificates that is allocable to such payment. If multiple
payments are received on the commitment, the holder may be required to allocate
its basis among those payments. The method for making such an allocation is
unclear under current law. If a holder receives a payment that is less than its
basis in the commitment, the holder may not be allowed a loss until it is
determined that no further payments will be made. Where the receipt of a payment
terminates all rights of the rights trust under the commitment, any gain or loss
attributable to the payment generally would be capital gain or loss under
Section 1234A of the Internal Revenue Code. It is not clear whether the same
treatment would apply to a partial payment.

LACK OF A CASH RECOVERY

    If identifiable events occur which establish that the rights certificates
have no value, a certificate holder would be entitled to deduct as a capital
loss, in the year of that event, the holder's adjusted tax basis in its
certificates.

OTHER CHARACTERIZATIONS

    Although unlikely, the Internal Revenue Service could take the position that
amounts drawn from the expense fund to pay expenses of the trust should be
treated as a payment by Bank United Corp. or its successor to the rights trust.
Such a payment could potentially be treated as current income to the rights
trust or as a deemed loan. A deemed loan would be repayable, with interest,
solely out of future payments on the commitment. Under this characterization,
reductions in the commitment amount paid to the rights trust that are
attributable to the reimbursement of those expenses or a related interest factor
would be treated as additional amounts that are paid to the rights trust and
applied by it to make payments of principal and interest on the deemed loan.
Deductions would be allowed for interest deemed paid only as permitted under the
general rules of the Internal Revenue Code. Further, if the deemed loan is not
repaid, the rights trust could have income when the loan is deemed to be
discharged. In addition, any holders of rights certificates that are pension
plans or other tax-exempt organizations subject to the tax on unrelated business
taxable income may be required to treat income attributable to the portion of
the commitment that is considered debt financed as unrelated business taxable
income.

FUNDING OF ADDITIONAL EXPENSES

    If the rights trust issues additional rights certificates to pay expenses,
any issuance of additional rights certificates will be treated as a sale by
holders of existing rights certificates of an interest in the right's trust
assets equal to the portion of the assets represented by the newly issued
certificates.

                                       24
<PAGE>
BACKUP WITHHOLDING AND INFORMATION REPORTING

    A rights certificate holder may be subject to a backup withholding tax of
31% on the receipt of proceeds of a sale, exchange, redemption or satisfaction
of the rights certificates. In general, backup withholding will only apply if a
holder fails to comply with certain identification requirements. Backup
withholding is not an additional tax and may be claimed as a credit against the
U.S. federal income tax liability of a holder, provided that the required
information is furnished to the Internal Revenue Service. Holders should consult
their tax advisors regarding their qualification for exemption from backup
withholding and the procedure for obtaining any applicable exemption. Payments
of amounts treated as interest under Section 483 will also be subject to
information reporting unless an exemption applies.

                   WHERE YOU CAN FIND ADDITIONAL INFORMATION

    Bank United Corp., as sponsor of the rights trust, has filed a registration
statement with the SEC under the Securities Act of 1933, as amended, that
registers the distribution of the rights certificates resulting from the
reorganization. The registration statement, including the attached exhibits,
contains additional relevant information about the rights trust and the rights
certificates. The rules and regulations of the SEC allow the rights trust to
omit some of the information included in the registration statement from this
prospectus.

    In addition, the rights certificates will be registered under the Securities
Exchange Act of 1934, as amended. So long as the rights certificates remain so
registered, the rights trust will be subject to the reporting obligations of
Section 13(a) of the Securities Exchange Act, and will be obligated to file with
the SEC annual reports on Form 10-K and quarterly reports on Form 10-Q. Unless
otherwise required by the SEC, these reports will contain only an overview of
the status of the forbearance litigation. The rights trust will also file a
report on Form 8-K upon the occurrence of a material judicial decision in the
forbearance litigation or in the event of any agreement to settle the
forbearance litigation. These reports will not include financial statements or
any valuation of the forbearance litigation. The rights trust's ability to
disclose details of the forbearance litigation may be limited, however, by the
inherent nature and rules of judicial proceedings, including, among other
things, proceedings and filings that are sealed by the court, matters involving
attorney-client privilege and proceedings that are conducted on a confidential
basis by agreement of the parties, such as settlement negotiations.

    You will be able to read and copy documents filed publicly by the rights
trust with the SEC at the following locations of the SEC:

<TABLE>
<S>                            <C>                            <C>
    Public Reference Room        Northeast Regional Office       Midwest Regional Office
   450 Fifth Street, N.W.          7 World Trade Center          500 West Madison Street
         Room 1024                      Suite 1300                     Suite 1400
   Washington, D.C. 20549        New York, New York 10048     Chicago, Illinois 60661-2511
</TABLE>

    You can also obtain copies of those documents by mail from the Public
Reference Section of the SEC, 450 Fifth Street, N.W., Room 1024, Washington,
D.C. 20549, at prescribed rates. The SEC also maintains an Internet world wide
web site that will contain those documents. The address of that site is
HTTP://WWW.SEC.GOV.

    You can also read and obtain copies of reports, proxy statements and other
information about Bank United Corp. and Washington Mutual, Inc. at those
locations and sites.

    SEC rules permit the rights trust to "incorporate by reference" information
into this prospectus. This means that the rights trust could disclose important
information to you by referring you to another document filed separately with
the SEC. Any information incorporated by reference would be considered a part of
this prospectus, except for any information that is superseded by information
that

                                       25
<PAGE>
is included directly in this document. At this time, the rights trust has not
filed any documents with the SEC except for the registration statement and
amendments to the registration statement. The rights trust may, however, make
additional filings with the SEC under the Exchange Act of 1934 between the date
of this prospectus and the date of the special meeting of Bank United Corp.
stockholders being held to approve the reorganization. Any documents filed by or
on behalf of the rights trust during that period under Section 13(a), 13(c), 14
or 15(d) of the Exchange Act of 1934 will be considered to have been
incorporated into this prospectus by reference.

    You can obtain any documents incorporated by reference through Bank United
Corp. or from the SEC through the SEC's Internet world wide web site at the
address described above. Documents incorporated by reference are available from
the rights trust without charge, excluding any exhibits to those documents,
unless the exhibit is specifically incorporated by reference as an exhibit in
this prospectus. You can obtain documents incorporated by reference in this
prospectus by requesting them in writing or by telephone from Bank United Corp.
at the following address:

                               Bank United Corp.
                             3200 Southwest Freeway
                                   Suite 2600
                           Houston, Texas 77251-1370
                                 (713) 543-6500

    If you would like to request documents, please do so by February 1, 2001 to
receive them before the special meeting. If you request any incorporated
documents, Bank United Corp. will mail them to you by first class mail, or
another equally prompt means, within one business day after it receives your
request.

    Neither the rights trust nor Bank United Corp. on behalf of the rights trust
has authorized anyone to give any information or make any representation about
the rights trust, the rights certificates, the reorganization or the forbearance
litigation that is different from, or in addition to, that contained in this
prospectus. Therefore, if anyone does give you information of this sort, you
should not rely on it. The information contained in this document speaks only as
of the date of this document unless the information specifically indicates that
another date applies.

                      VALIDITY OF THE RIGHTS CERTIFICATES

    The validity of the rights certificates being offered by this prospectus
will be passed upon for the rights trust by Potter Anderson & Corroon, LLP,
Wilmington, Delaware.

                                       26
<PAGE>
                                                                      APPENDIX A

                              AMENDED AND RESTATED
                              DECLARATION OF TRUST

                                       OF

                          BANK UNITED CORP. LITIGATION
                        CONTINGENT PAYMENT RIGHTS TRUST

                               FEBRUARY   , 2001
<PAGE>
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                        ARTICLE I.
                              INTERPRETATION AND DEFINITIONS
Section 1.01   Definitions.................................................     A-2

                                       ARTICLE II.
                                       ORGANIZATION
Section 2.01   Name........................................................     A-6
Section 2.02   Office......................................................     A-6
Section 2.03   Purposes and Powers of the Litigation Trust.................     A-7
Section 2.04   Title to Property of the Litigation Trust...................     A-7
Section 2.05   Mergers.....................................................     A-8

                                       ARTICLE III.
                                         TRUSTEES
Section 3.01   Authority...................................................     A-9
Section 3.02   Number of Trustees..........................................     A-9
Section 3.03   Delaware Trustee............................................     A-9
Section 3.04   Institutional Trustee; Eligibility..........................    A-10
Section 3.05   Appointment, Removal and Resignation of the Institutional
                 and Delaware Trustees.....................................    A-10
Section 3.06   Vacancies Among Relevant Trustees; Effect of Vacancies......    A-12
Section 3.07   The Litigation Trustees.....................................    A-12
Section 3.08   Limitation on Liability of Litigation Trustees..............    A-12
Section 3.09   Resignation of a Litigation Trustee.........................    A-12
Section 3.10   Appointment of Successor Litigation Trustees................    A-12
Section 3.11   Meetings of the Trustees....................................    A-13
Section 3.12   Powers and Duties of Sponsor, Litigation Trustees and
                 Institutional Trustee.....................................    A-14
Section 3.13   Certain Duties and Responsibilities of the Trustees.........    A-17
Section 3.14   Certain Rights of the Institutional Trustee.................    A-19
Section 3.15   Lists of Holders of CPR Certificates........................    A-20
Section 3.16   Execution of Documents......................................    A-20
Section 3.17   Not Responsible for Recitals or Issuance of CPR
                 Certificates..............................................    A-21
Section 3.18   Filings with the Commission.................................    A-21
Section 3.19   Default; Notice.............................................    A-21

                                       ARTICLE IV.
                                   PAYMENTS TO HOLDERS
Section 4.01   Payment to Holders..........................................    A-21
Section 4.02   Timing of Payments..........................................    A-22
Section 4.03   Default; Waiver.............................................    A-22

                                        ARTICLE V.
                             EXPENSES AND THE RETAINED AMOUNT
Section 5.01   Expenses....................................................    A-22
Section 5.02   Return of Funds.............................................    A-22
Section 5.03   Retained Amount.............................................    A-22
</TABLE>

                                       i
<PAGE>

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                       ARTICLE VI.
                               MANAGEMENT OF THE LITIGATION
Section 6.01   Authority of the Litigation Trustees........................    A-23
Section 6.02   Retention of Attorneys, Accountants and Other
                 Professionals.............................................    A-23
Section 6.03   Cooperation by the Sponsor..................................    A-24

                                       ARTICLE VII.
                      ISSUANCE AND DISTRIBUTION OF CPR CERTIFICATES
Section 7.01   General Provisions Regarding CPR Certificates...............    A-25
Section 7.02   Paying Agent, Transfer Agent and Registrar..................    A-25
Section 7.03   Form and Dating.............................................    A-26
Section 7.04   Mutilated, Destroyed, Lost or Stolen Certificates...........    A-27
Section 7.05   Temporary CPR Certificates..................................    A-27
Section 7.06   Issuance of CPR Certificates on the Effective Date..........    A-27
Section 7.07   Redemption and Cancellation.................................    A-27
Section 7.08   Issuance of CPR Certificates after the Effective Time.......    A-28

                                      ARTICLE VIII.
                     DISSOLUTION AND TERMINATION OF LITIGATION TRUST
Section 8.01   Dissolution and Termination of Litigation Trust.............    A-28

                                       ARTICLE IX.
                                  TRANSFER OF INTERESTS
Section 9.01   General.....................................................    A-29
Section 9.02   Transfer Procedures.........................................    A-29
Section 9.03   Deemed CPR Certificate Holders..............................    A-31
Section 9.04   Notices to Clearing Agency..................................    A-31
Section 9.05   Appointment of Successor Clearing Agency....................    A-31

                                        ARTICLE X.
                               HOLDERS OF CPR CERTIFICATES
Section 10.01  Limitations on Rights of Holders............................    A-32
Section 10.02  Limitations on Suits by Holders.............................    A-32

                                       ARTICLE XI.
                    LIMITATION OF LIABILITY OF HOLDERS OF SECURITIES,
                                   TRUSTEES OR OTHERS
Section 11.01  Liability...................................................    A-34
Section 11.02  Exculpation.................................................    A-34
Section 11.03  Fiduciary Duty..............................................    A-35
Section 11.04  Indemnification.............................................    A-35
Section 11.05  Outside Businesses..........................................    A-36
Section 11.06  Compensation; Fee...........................................    A-37

                                       ARTICLE XII.
                                        ACCOUNTING
Section 12.01  Fiscal Year.................................................    A-37
Section 12.02  Certain Accounting Matters..................................    A-37
Section 12.03  Banking.....................................................    A-37
Section 12.04  Withholding.................................................    A-38
</TABLE>

                                       ii
<PAGE>

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                      ARTICLE XIII.
                                 AMENDMENTS AND MEETINGS
Section 13.01  Amendments..................................................    A-38
Section 13.02  Meetings of Holders of CPR Certificates; Action by Written
                 Consent...................................................    A-39

                                       ARTICLE XIV.
                         REPRESENTATIONS OF INSTITUTIONAL TRUSTEE
                                   AND DELAWARE TRUSTEE
Section 14.01  Representations and Warranties of the Institutional
                 Trustee...................................................    A-40
Section 14.02  Representations and Warranties of the Delaware Trustee......    A-40

                                       ARTICLE XV.
                                      MISCELLANEOUS
Section 15.01  Notices.....................................................    A-41
Section 15.02  Governing Law...............................................    A-43
Section 15.03  Intention of Parties........................................    A-43
Section 15.04  Headings....................................................    A-43
Section 15.05  Successors and Assigns......................................    A-43
Section 15.06  Partial Enforceability......................................    A-43
Section 15.07  Specific Performance........................................    A-43
Section 15.08  Counterparts................................................    A-43
Section 15.09  Consent of Jurisdiction.....................................    A-44
Section 15.10  Default Rules...............................................    A-44
</TABLE>

                                      iii
<PAGE>
                              AMENDED AND RESTATED
                              DECLARATION OF TRUST
                                       OF
                          BANK UNITED CORP. LITIGATION
                        CONTINGENT PAYMENT RIGHTS TRUST
                               FEBRUARY   , 2001

    This Amended and Restated Declaration of Trust (this "Declaration" or this
"Agreement") dated and effective as of February   , 2001, by the Trustees (as
defined herein), Bank United Corp. (along with its successors, the "Sponsor")
and by the holders, from time to time, of undivided beneficial interests in the
assets of the Bank United Litigation Contingent Payment Rights Trust (the
"Litigation Trust") to be issued pursuant to this Declaration;

    WHEREAS, the Delaware Trustee (as defined herein) and the Sponsor, by a
Declaration of Trust, dated and effective as of November 2, 2000 (the "Original
Declaration"), and by a Certificate of Trust filed with the Secretary of State
of the State of Delaware on the same date, established a statutory business
trust under the Delaware Business Trust Act (as defined herein) for the sole
purposes of holding the Commitment Amount (as defined herein) and of filing a
registration statement under the Securities Act (as defined herein) with the
Securities and Exchange Commission relating to the issuance of CPR Certificates
(as defined herein);

    WHEREAS, the Institutional Trustee, the Delaware Trustee and the Sponsor, by
this declaration, hereby amend and restate the Original Declaration as set forth
herein;

    WHEREAS, the Trustees (as defined herein) have established, or
simultaneously herewith will establish, the Bank United Corp. Payment Rights
Trust (the "Payment Trust"), a statutory business trust under the Business Trust
Act for the sole purpose of holding and distributing the Proceeds Amount (as
defined herein) to the Litigation Trust or its successor;

    WHEREAS, the Sponsor holds all of the beneficial interests in the Payment
Trust;

    WHEREAS, the Sponsor and Washington Mutual, Inc. ("Washington Mutual") have
entered into an Agreement and Plan of Merger (the "Merger Agreement"), dated as
of August 18, 2000, as amended, and the Sponsor and CPR Merger Corporation, a
wholly owned subsidiary of the Sponsor ("Merger Sub"), have entered into an
Agreement and Plan of Merger (the "Plan of Reorganization"), which together
contemplate that (i) immediately prior to the effective time of the merger (the
"Merger") of the Sponsor with and into Washington Mutual, (ii) Merger Sub will
merge (the "Reorganization") with and into the Sponsor, as a result of which
each share of Class A Common Stock, par value $0.01 per share, of the Sponsor
("Sponsor Common Stock"), issued and outstanding immediately prior to the
effective time of the Reorganization (the "Effective Time") will be
automatically converted into one new share of Sponsor Common Stock and the right
to receive one CPR Certificate, with appropriate and proportionate adjustments
to be made to other equity-based securities of the Sponsor, (iii) immediately
prior to the Effective Time, the Litigation Trust will issue CPR Certificates to
the Sponsor, which CPR Certificates will represent assignable and transferable
undivided beneficial interests in the assets of the Litigation Trust, in part to
be issued in the Reorganization, in part to be held for future issuance as more
fully provided in the Plan of Reorganization and herein, and in part to be
issued to the Litigation Trustees (as defined herein) as compensation pursuant
to the terms of the Litigation Trustee Agreements (as defined herein), and
(iv) at the Effective Time, and effective at the Effective Time, the Sponsor
will enter into a Commitment Agreement (the "Commitment"), in the form attached
hereto as EXHIBIT A, pursuant to which the Sponsor will be obligated to pay to
the Payment Trust from time to time an aggregate amount equal to the Commitment
Amount, and the Payment Trust will be obligated to distribute to the Litigation
Trust the Proceeds Amounts (as defined herein).

                                      A-1
<PAGE>
    WHEREAS, the Litigation Trust will hold the Commitment and the Litigation
Trustees (as defined herein) will, upon the effectiveness of the Commitment,
instruct the Sponsor and Bank United, a wholly-owned subsidiary of the Sponsor
(along with its successors, "Bank United") pursuant to the terms of this
Declaration as to the administration of the litigation claims of the Sponsor and
Bank United, and any of their successors, in the litigation filed on July 25,
1995, by the Sponsor, Bank United and Hyperion Partners L.P. against the United
States in the U.S. Court of Federal Claims for alleged failures of the United
States to adhere to its agreement to waive or forbear from enforcing certain
provisions concerning regulatory capital requirements, liquidity requirements,
accounting requirements and other matters, and or any substitute or ancillary
action, litigation or arbitration with respect to the claims made in such action
(the "Litigation");

    WHEREAS, nothing in this Declaration shall be deemed to be or to effect an
assignment (within the meaning of 31 U.S.C. 3727) of the Litigation; and

    WHEREAS, as of the date hereof, no interests in the Litigation Trust have
been issued;

    NOW, THEREFORE, it being the intention of the parties hereto to establish
the Litigation Trust as a statutory business trust under the Business Trust Act
and that this Declaration constitute the governing instrument of such statutory
business trust, the Trustees declare that all assets contributed to the
Litigation Trust will be held in trust for the benefit of the holders of the
beneficial interests in the assets of the Litigation Trust, subject to the
provisions of this Declaration.

                                   ARTICLE I.
                         INTERPRETATION AND DEFINITIONS

    Section 1.01  DEFINITIONS.

    Unless the context otherwise requires:

    (a) capitalized terms used in this Declaration but not defined in the
preamble above have the respective meanings assigned to them in this
Section 1.01;

    (b) a term defined anywhere in this Declaration has the same meaning
throughout;

    (c) all references to "the Declaration" or "this Declaration" are to this
Declaration, in its entirety, as modified, supplemented or amended from time to
time, and not to any particular Article, Section or subsection;

    (d) all references to "herein" or "hereunder" refer to this Declaration in
its entirety, as modified, supplemented or amended from time to time, and not to
any particular Article, Section or subsection;

    (e) all references in this Declaration to Articles and Sections and Exhibits
are to Articles and Sections of and Exhibits to this Declaration unless
otherwise specified;

    (f) a reference to the singular includes the plural and vice versa; and

    (g) a reference to the masculine includes the feminine and vice versa.

    "Affiliate" has the same meaning as given to that term in Rule 405 of the
Securities Act or any successor Rule thereunder.

    "Agreement" has the meaning set forth in the preamble hereof.

    "Authorized Officer" of a Person means any Person that is authorized to bind
such Person.

    "Bank United" has the meaning set forth in the recitals hereof.

    "Bank United Group" means the Sponsor, Bank United and any of their
respective successors, their subsidiaries and Affiliates and the subsidiaries
and Affiliates of their respective successors,

                                      A-2
<PAGE>
including without limitation Washington Mutual, Inc. and its Affiliates and
subsidiaries after the Washington Mutual Merger, PROVIDED that Hyperion shall
not be deemed to be a member of the Bank United Group.

    "Bank United Litigation Committee" has the meaning set forth in
Section 3.11(b).

    "Book Entry Interest" means a beneficial interest in one or more Global CPR
Certificates, ownership and transfers of which shall be maintained and made
through book entries by a Clearing Agency as described in Section 9.02.

    "Business Day" means any day other than Saturday, Sunday or any other day on
which banking institutions in Seattle (in the State of Washington), Houston (in
the State of Texas), or Wilmington (in the State of Delaware) are permitted or
required by any applicable law to close.

    "Business Trust Act" means Chapter 38 of Title 12 of the Delaware Code,
12 Del. Code sec. 3801 et seq., as it may be amended from time to time, or any
successor legislation.

    "Clearing Agency" means an organization registered as a "Clearing Agency"
pursuant to Section 17A of the Exchange Act that is acting as depositary for the
CPR Certificates and in whose name (or in the name of a nominee of that
organization) shall be registered a Global CPR Ceritificate and which shall
undertake to effect book entry transfers and pledges of the CPR Certificates.

    "Clearing Agency Participant" means a broker, dealer, bank, other financial
institution or other Person for whom from time to time the Clearing Agency
effects book entry transfers and pledges of securities deposited with the
Clearing Agency.

    "Code" means the Internal Revenue Code of 1986, as amended from time to
time, or any successor legislation.

    "Commission" means the Securities and Exchange Commission.

    "Commitment" has the meaning set forth in the recitals hereof.

    "Commitment Amount" has the meaning set forth in the Commitment.

    "Corporate Trust Office" means the office of the Institutional Trustee at
which the corporate trust business of the Institutional Trustee shall, at any
particular time, be principally administered, which office at the date of
execution of this Declaration is located at Rodney Square, Suite 102, 920 King
Street, New Castle County, Wilmington, Delaware 19801, Attention:             ;
facsimile number             .

    "CPR Certificates" means the Contingent Payment Right Certificates,
including the Contingent Payment Right Certificates issued immediately prior to
the Effective Time and any other Contingent Payment Right Certificates issued by
the Litigation Trust.

    "Damages" has the meaning set forth in Section 11.04(a).

    "Declaration" has the meaning set forth in the preamble hereto.

    "Default Rule" means a rule stated in the Business Trust Act that
(i) structures, defines or regulates the finances, governance, operations or
other aspects of a Delaware business trust organized under the Business Trust
Act and (ii) applies except to the extent it is negated or modified through the
provisions of a governing instrument.

    "Definitive CPR Certificate" has the meaning set forth in Section 7.03(b).

    "Delaware Trustee" has the meaning set forth in Section 3.03(a).

    "Depositary" means, with respect to the CPR Certificates, DTC or another
Clearing Agency.

                                      A-3
<PAGE>
    "DTC" means The Depository Trust Company, New York, New York, the initial
Clearing Agency.

    "Effective Time" has the meaning set forth in the recitals hereof.

    "Effective Date" shall mean the date on which the Effective Time occurs.

    "Exchange Act" means the Securities Exchange Act of 1934, as amended from
time to time, or any successor legislation.

    "Fiscal Year" has the meaning set forth in Section 12.01.

    "Global CPR Ceritificate" has the meaning set forth in Section 7.03(b).

    "Holder" means a Person in whose name a CPR Ceritificate is registered on
the register maintained by the Registrar pursuant to Section 7.02, such Person
being a beneficial owner within the meaning of the Business Trust Act.

    "Hyperion" means Hyperion Partners L.P., a Delaware limited partnership.

    "Indemnified Person" means (a) the Institutional Trustee, the Delaware
Trustee, any Affiliate of the Institutional Trustee or the Delaware Trustee, and
any officers, directors, stockholders, members, partners, employees,
representatives, custodians, nominees or agents of the Institutional Trustee and
the Delaware Trustee; (b) any Litigation Trustee; (c) any Affiliate of any
Litigation Trustee; (d) any partners, employees, representatives, agents,
counsel and other advisors of any Litigation Trustee; (e) any member of the Bank
United Litigation Committee; (f) any officer, employee, representative, agent,
counsel or other advisors of the Litigation Trust or its Affiliates.

    "Institutional Trustee" means the Trustee meeting the eligibility
requirements set forth in Section 3.04 and duly appointed pursuant to this
Declaration.

    "Investment Company" means an investment company as defined in the
Investment Company Act.

    "Investment Company Act" means the Investment Company Act of 1940, as
amended from time to time, or any successor legislation.

    "List of Holders" has the meaning set forth in Section 3.15.

    "Litigation" has the meaning set forth in the recitals hereof.

    "Litigation Proceeds" has the meaning set forth in the Commitment.

    "Litigation Trust" has the meaning set forth in the first paragraph of this
Declaration.

    "Litigation Trustees" has the meaning set forth in Section 3.07.

    "Litigation Trustee Agreements" means the Litigation Trustee Agreements,
dated as of August 18, 2000, entered into by each of the initial Litigation
Trustees and the Sponsor, copies of which are attached as Exhibit B.

    "Litigation Trust Property" means (a) the Commitment and all proceeds and
rights in respect of the Commitment and (b) any other assets that may be held
from time to time by the Litigation Trust.

    "Litigation Trust Purpose" shall have the meaning set forth in
Section 2.03.

    "Merger" has the meaning set forth in the recitals hereof.

    "Merger Agreement" has the meaning set forth in the recitals hereof.

    "Non-Cash Proceeds" has the meaning set forth in the Commitment.

    "Officers' Certificates" means, (i) with respect to any Person other than
Litigation Trustees, a certificate signed by two Authorized Officers of such
Person, and (ii) with respect to the Litigation

                                      A-4
<PAGE>
Trustees, a certificate signed by a majority of the Litigation Trustees then in
office. Any Officers' Certificate delivered with respect to compliance with a
condition or covenant provided for in the Declaration shall include:

        (i) a brief statement of the nature and scope of the examination or
    investigation undertaken by each Authorized Officer or Litigation Trustee in
    rendering the Certificate; and

        (ii) a statement as to whether, in the opinion of each such Authorized
    Officer or Litigation Trustee, such condition or covenant has been complied
    with.

    "Paying Agent" has the meaning specified in Section 7.02.

    "Payment Amount" shall mean, with respect to each distribution of the
Proceeds Amount received by the Litigation Trust pursuant to the Commitment,
such payment of the Proceeds Amount received by the Litigation Trust (including
the amount of cash resulting from the monetization by the Sponsor of any
Non-Cash Proceeds) less the amount of any accrued but unpaid expenses payable by
the Litigation Trust, plus interest or income, if any, received by the
Litigation Trust on such payment of the Proceeds Amount, less amounts retained
by the Litigation Trust as the Retained Amount.

    "Payment Trust" has the meaning set forth in the recitals hereof.

    "Payment Trust Agreement" means the Amended and Restated Declaration of
Trust, dated February   , 2001 relating to the Payment Trust.

    "Payment Trust Trustees" means the trustees of the Payment Trust.

    "Permitted Investment" means [the Merrill Lynch Government Fund money market
fund (including any successor)] or, if at the time of the receipt of the
applicable payment of the Commitment Amount by the Litigation Trust (i) such
fund is not in existence, (ii) such fund is no longer limited to investing in
short-term obligations of or guaranteed by the United States government,
(iii) such fund is not accepting new investors or new investments or will not
accept the investment of the Commitment Amount or the Retained Amount, as the
case may be, or (iv) such fund is not AAA rated by Standard and Poor's, the [AAA
rated money market fund reported in the IBC Rated Money Fund Report to have the
largest amount of assets under management as of the end of the most recent year
for which information is publicly available and which will accept such
investment].

    "Person" means a legal person, including any individual, corporation,
estate, partnership, joint venture, association, joint stock company, limited
liability company, trust, unincorporated association, or government or any
agency or political subdivision thereof, or any other entity of whatever nature.

    "Plan of Reorganization" has the meaning set forth in the recitals hereof.

    "Proceeds Amount" has the meaning set forth in the Commitment.

    "Recovery Agreement" has the meaning set forth in Section 6.01(e).

    "Reference Rate" means the reference rate or an equivalent rate publicly
announced from time to time of             or any successor (or, if no successor
remains in existence or publicly announces a rate, the commercial bank with the
largest amount of deposits in the State of New York as of the most recent year
end prior to the applicable date for which information is publicly available and
which publicly announces such a rate, as determined in good faith by the
Sponsor), as in effect from time to time.

    "Registrar" has the meaning set forth in Section 7.02.

    "Reimbursements" has the meaning set forth in the Commitment.

    "Relevant Trustee" has the meaning set forth in Section 3.05.

                                      A-5
<PAGE>
    "Replacement Options" has the meaning set forth in the Merger Agreement.

    "Responsible Officer" means, with respect to the Institutional Trustee, any
officer within the Corporate Trust Office of the Institutional Trustee,
including any managing director, vice-president, any assistant vice-president,
any assistant secretary, the treasurer, any assistant treasurer or other officer
of the Corporate Trust Office of the Institutional Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate Litigation Trust
matter, any other officer to whom such matter is referred because of that
officer's knowledge of and familiarity with the particular subject.

    "Retained Amount" has the meaning set forth in Section 5.03(a).

    "Retained Amount Period" has the meaning set forth in Section 5.03(a).

    "Securities Act" means the Securities Act of 1933, as amended from time to
time, or any successor legislation.

    "Sponsor" has the meaning set forth in the first paragraph of this
Agreement.

    "Successor Certificates" has the meaning set forth in
Section 2.05(b)(i)(B).

    "Successor Delaware Trustee" has the meaning set forth in Section 3.05(b).

    "Successor Entity" has the meaning set forth in Section 2.05(b)(i).

    "Successor Institutional Trustee" has the meaning set forth in
Section 3.05(b).

    "Transfer Agent" has the meaning set forth in Section 7.02.

    "Trustee" or "Trustees" means each Person who has signed this Declaration as
a Trustee, so long as such Person shall continue in office in accordance with
the terms hereof, and all other Persons who may from time to time be duly
appointed, qualified and serving as Institutional Trustee, Delaware Trustee or
Litigation Trustee in accordance with the provisions hereof, and references
herein to a Trustee or the Trustees shall refer to such Person or Persons solely
in their capacity as Trustees hereunder.

    "Washington Mutual" has the meaning set forth in the recitals hereof.

    "Washington Mutual Merger" means the merger of the Sponsor with and into
Washington Mutual pursuant to the terms, and subject to the conditions, set
forth in the Merger Agreement.

                                  ARTICLE II.
                                  ORGANIZATION

    Section 2.01  NAME.  The Litigation Trust shall continue to be named "Bank
United Litigation Contingent Payment Rights Trust", as such name may be modified
from time to time by the Litigation Trustees following written notice to the
Holders. The Litigation Trust's activities may be conducted under the name of
the Litigation Trust or any other name deemed advisable by the Litigation
Trustees.

    Section 2.02  OFFICE.  The address of the principal office of the Litigation
Trust on the date of execution of this Declaration is:

    c/o Bank United Corp.
    3200 Southwest Freeway
    Houston, Texas 77027

Attention: Jonathon K. Heffron
    Facsimile: 713-543-7744

                                      A-6
<PAGE>
    On ten Business Days written notice to the Holders, the Institutional
Trustee may designate another principal office at the instruction of the
Litigation Trustees.

    Section 2.03  PURPOSES AND POWERS OF THE LITIGATION TRUST.

    (a) The exclusive purposes and functions of the Litigation Trust (each, a
"Litigation Trust Purpose") are (i) to hold and enforce the Commitment,
(ii) for the purpose of, and in a manner consistent with, achieving the
realization and distribution of amounts payable pursuant to the Commitment, upon
the effectiveness of the Commitment, to instruct the Sponsor, Bank United and
their successors to prosecute, appeal, resolve, settle, compromise or otherwise
pursue the Litigation and (iii) upon receipt of payments of the Proceeds Amount
pursuant to the Commitment, to distribute the Payment Amount as provided herein,
and thereafter to distribute any portion of the Retained Amount remaining at the
end of the Retained Amount Period as provided herein, to the Holders in as
prompt and orderly a fashion as possible consistent with this Declaration.
Anything to the contrary herein or in the Business Trust Act notwithstanding,
the Trustees shall not at any time, on behalf of the Litigation Trust or the
Holders, enter into or engage in any profit-making trade or business, and the
Trustees shall have no powers to take, and shall not take, any actions hereunder
other than such as are reasonably necessary and incidental to the achievement of
the foregoing exclusive Litigation Trust Purposes.

    (b) Notwithstanding anything in this Declaration or in any Default Rule of
the Business Trust Act to the contrary, no Trustee shall have any power to
(i) modify the terms of the Commitment unless a breach of the Sponsor has
occurred thereunder or is reasonably foreseeable, (ii) invest money held by the
Litigation Trust except amounts held, pursuant to Sections 3.12(b)(ii)(d) and
5.03 hereof, pending their use to pay expenses or make distributions, or
(iii) after the Effective Time, issue any CPR Certificates except as
contemplated by this Agreement or pursuant to the Litigation Trustee Agreements.

    (c) In order to raise funds for, or meet its obligation to pay, expenses
reasonably necessary to preserve or protect assets of the Litigation Trust or to
administer the Litigation Trust (including, without limitation, expenses related
to the Litigation and expenses related to the liability and indemnification
obligations of the Litigation Trust), and solely in furtherance of Litigation
Trust Purposes, the Litigation Trustees on behalf of the Litigation Trust may
undertake the following:

        (i) enter into, subject to the limitations set forth in
    Section 6.02(a), customary fee arrangements (including fees contingent on
    receipt by the Litigation Trust of, and determined by reference to, all or
    any portion of the Commitment Amount) with counsel for the Litigation, to
    the Litigation Trust or to the Litigation Trustees, experts or consultants,
    which arrangements either (x) provide for such counsel, experts or
    consultants to receive amounts that represent for federal income tax
    purposes arms-length compensation for services when paid in cash by the
    Litigation Trust or (y) otherwise do not create ownership interests in the
    Litigation Trust for federal income tax purposes other than CPR Certificates
    of the same class as the CPR Certificates issued immediately prior to the
    Merger representing pro rata interests in the Litigation Trust;

        (ii) incur indebtedness that represents debt of the Litigation Trust
    (and not an ownership interest) for federal income tax purposes; and

        (iii) issue additional CPR Certificates after the Reorganization in
    accordance with Section 7.08.

    Section 2.04  TITLE TO PROPERTY OF THE LITIGATION TRUST.  Legal title to all
assets of the Litigation Trust shall be vested in the Litigation Trust. The
Holders shall not have legal title to any part of the assets of the Litigation
Trust, but shall have an undivided beneficial interest in the assets of the
Litigation Trust.

                                      A-7
<PAGE>
    Section 2.05  MERGERS.

    (a) The Litigation Trust may not consolidate, amalgamate, merge with or
into, or be replaced by, or convey, transfer or lease its properties and assets
substantially as an entirety to any corporation or other body, except as
described in paragraph (b) of this Section 2.05 or in a liquidation of the
Litigation Trust in accordance with this Declaration.

    (b) The Litigation Trust may, with the consent of the Institutional Trustee
(acting in reliance on the opinions delivered pursuant to this Section 2.05) and
a majority of the Litigation Trustees and without the consent of the Delaware
Trustee or the Holders of the CPR Certificates, consolidate, amalgamate, merge
with or into, or be replaced by a person organized as such under the laws of any
state of the United States; PROVIDED that:

        (i) if the Litigation Trust is not the survivor, such successor entity
    (the "Successor Entity") either:

           (A) expressly assumes all of the obligations of the Litigation Trust
       under the CPR Certificates; or

           (B) substitutes for the CPR Certificates other securities having
       substantially the same terms as the CPR Certificates (the "Successor
       Certificates");

        (ii) the Successor Certificates remain listed, or any Successor
    Certificates will be listed or quoted upon notification of issuance, on any
    national securities exchange or automated quotation system on which the CPR
    Certificates are then listed or quoted, if any;

        (iii) such merger, consolidation, amalgamation or replacement does not
    result in any material alteration of the Litigation Trust Property or
    adversely affect the rights, preferences and privileges of the Holders
    (including any Successor Certificates) in any material respect (other than
    with respect to any dilution of such Holders' interests in the Successor
    Entity);

        (iv) such Successor Entity has purposes that are substantially identical
    to the Litigation Trust Purposes;

        (v) prior to such merger, consolidation, amalgamation or replacement,
    the Litigation Trust has received an opinion of nationally recognized
    outside counsel to the Litigation Trust experienced in such matters and
    selected by the Litigation Trustees to the effect that:

           (a) such merger, consolidation, amalgamation or replacement does not
       adversely affect the rights, preferences and privileges of the Holders
       (including any Successor Certificates) in any material respect (other
       than with respect to any dilution of the Holders' interest in the
       Successor Entity);

           (b) such merger, consolidation, amalgamation or replacement, will not
       cause the Litigation Trust (or the Successor Entity) to fail to be
       classified as a grantor trust for United States federal income tax
       purposes; PROVIDED, HOWEVER, that the Litigation Trust shall not be
       required to receive the opinion set forth in clause (b) if a majority of
       the Holders of CPR Certificates outstanding shall have approved such
       merger, consolidation, amalgamation or replacement;

        (vi) without the unanimous consent of the Litigation Trustees, such
    merger, consolidation, amalgamation or replacement shall not result in any
    material change to the rights of the Litigation Trustees, including, without
    limitation, their rights to indemnification, exculpation and compensation
    set forth in this Declaration and under Delaware law; and

                                      A-8
<PAGE>
        (vii) prior to such merger, consolidation, amalgamation or replacement
    the Institutional Trustee shall have received an opinion of counsel to the
    effect that all conditions precedent of this paragraph (b) to such
    transaction have been satisfied.

    (c) Pursuant to Section 3815(f) of the Business Trust Act, in the case of a
consolidation, amalgamation, or merger of the Litigation Trust with or into, or
the replacement by, a person organized as such under the laws of any state of
the United States, subject to the requirements described in Section 2.05(b)
above, the agreement of merger or consolidation may effect any amendment to this
Declaration, or effect the adoption of a new governing instrument of the
Litigation Trust if it is the surviving or resulting business trust in the
merger or consolidation. Such amendment or new governing instrument shall be
effective at the effective time or date of the merger or consolidation.

                                  ARTICLE III.
                                    TRUSTEES

    Section 3.01  AUTHORITY.  Except as specifically provided in this
Declaration, the Institutional Trustee and the Litigation Trustees shall have
exclusive and complete authority to carry out the Litigation Trust Purposes. An
action taken by a Trustee in accordance with its powers shall constitute the act
of and serve to bind the Litigation Trust, it being understood that except as
provided expressly herein the Litigation Trustees may act only upon the vote or
consent (such consent to be evidenced by a writing executed contemporaneously
with or promptly following any oral consent) of a majority of the Litigation
Trustees. In dealing with the Trustees acting on behalf of the Litigation Trust,
no Person shall be required to inquire into the authority of the Trustees to
bind the Litigation Trust. Persons dealing with the Litigation Trust are
entitled to rely conclusively on the power and authority of the Trustees as set
forth in this Declaration.

    Section 3.02  NUMBER OF TRUSTEES.  There shall be one Delaware Trustee if
required by Section 3.03; the Institutional Trustee may also serve as Delaware
Trustee if it meets the applicable requirements, in which case Section 3.03
shall have no application to such entity in its capacity as Institutional
Trustee. There shall be one Institutional Trustee as required by Section 3.04.
There shall be two initial Litigation Trustees, subject to change as provided in
Section 3.07.

    Section 3.03  DELAWARE TRUSTEE.

    (a) If required by the Business Trust Act, one Trustee (the "Delaware
Trustee") shall be:

        (i) a natural person who is a resident of the State of Delaware; or

        (ii) if not a natural person, an entity which has its principal place of
    business in the State of Delaware, and otherwise meets the requirements of
    applicable law, including Section 3807 of the Business Trust Act.

    (b) The Delaware Trustee shall be either a natural person who is at least
21 years of age or a legal entity that shall act through one or more Authorized
Officers.

    (c) The initial Delaware Trustee shall be First Union Trust Company,
National Association.

    (d) Notwithstanding any other provision of this Declaration, the Delaware
Trustee shall not be entitled to exercise any powers, nor shall the Delaware
Trustee have any of the duties and responsibilities of any of the Trustees
described in this Declaration. Except as set forth in this Section 3.03, the
Delaware Trustee shall be a Trustee for the sole and limited purpose of
fulfilling the requirements of Section 3807 of the Business Trust Act.

                                      A-9
<PAGE>
    Section 3.04  INSTITUTIONAL TRUSTEE; ELIGIBILITY.

    (a) There shall at all times be one Trustee which shall act as Institutional
Trustee, which Trustee shall:

        (i) not be an Affiliate of the Sponsor;

        (ii) not offer or provide credit or credit enhancement to the Litigation
    Trust; and

        (iii) be a corporation or banking association organized and doing
    business under the laws of the United States of America or any State or
    Territory thereof or of the District of Columbia, authorized under such laws
    to exercise corporate trust powers, having a combined capital and surplus of
    at least 50 million U.S. dollars ($50,000,000), and subject to supervision
    or examination by federal, state, territorial or District of Columbia
    authority. If such corporation or banking association publishes reports of
    condition at least annually, pursuant to law or to the requirements of the
    supervising or examining authority referred to above, then for the purposes
    of this Section 3.04(a)(iii), the combined capital and surplus of such
    corporation or banking association shall be deemed to be its combined
    capital and surplus as set forth in its most recent report of condition so
    published.

    (b) If at any time the Institutional Trustee shall cease to be eligible to
so act under Section 3.04(a), the Institutional Trustee shall immediately resign
in the manner and with the effect set forth in Section 3.05(a).

    (c) The initial Institutional Trustee shall be First Union Trust Company,
National Association.

    (d) The Institutional Trustee shall continue to serve as a Trustee until
either:

        (i) the Litigation Trust has been completely liquidated and all amounts
    received or receivable or potentially receivable pursuant to the Commitment
    (including the final payment of the Commitment Amount and any portion
    remaining in the Retained Amount upon the expiration of the Retained Amount
    Period) and not otherwise applied as provided herein and any other amounts
    shall have been distributed to the Holders pursuant to the terms hereof and
    of the CPR Certificates; or

        (ii) a Successor Institutional Trustee has been appointed and has
    accepted that appointment in accordance with Section 3.05.

    Section 3.05  APPOINTMENT, REMOVAL AND RESIGNATION OF THE INSTITUTIONAL AND
DELAWARE TRUSTEES.

    (a) No resignation or removal of the Institutional or Delaware Trustee
(each, a "Relevant Trustee") and no appointment of a successor Trustee pursuant
to this Article shall become effective until the acceptance of appointment by
the successor Trustee in accordance with the applicable requirements of this
Section 3.05.

    (b) Subject to the immediately preceding paragraph, a Relevant Trustee may
resign at any time by giving written notice thereof to the Litigation Trustees
and the Holders. Upon the resignation of the Relevant Trustee, the Litigation
Trustees shall appoint a successor (the "Successor Institutional Trustee" or the
"Successor Delaware Trustee," as applicable) who shall execute an instrument of
acceptance as described in Section 3.05(e) below. If the instrument of
acceptance by the successor Relevant Trustee required by this Section 3.05 shall
not have been delivered to the Relevant Trustee within 60 days after the giving
of such notice of resignation, the Relevant Trustee may petition, at the expense
of the Litigation Trust, any court of competent jurisdiction for the appointment
of a successor Relevant Trustee. Such court may thereupon, after prescribing
such notice, if any, as it may deem proper, appoint a Relevant Trustee. The
resigning Relevant Trustee shall have no liability for the selection of such
successor pursuant to this Section 3.05.

                                      A-10
<PAGE>
    (c) The Institutional Trustee or the Delaware Trustee, or both of them, may
be removed by (i) the Litigation Trustees or (ii) Holders of a majority of the
CPR Certificates outstanding, in each case by delivery of notification of
removal to the Relevant Trustee (in its individual capacity and on behalf of the
Litigation Trust), with such removal by Holders being permitted (x) if no
default by the Litigation Trust with respect to its payment obligations under
Article IV shall have occurred and be continuing, only for cause and (y) if a
default by the Litigation Trust with respect to its payment obligations under
Article IV shall have occurred and be continuing, either with or without cause.
A Delaware Trustee who is a natural person may also be removed by the Litigation
Trustees if such Delaware Trustee becomes incompetent or incapacitated, and
shall be deemed removed if such Delaware Trustee dies. If a Relevant Trustee
shall be so removed, the Litigation Trustees shall promptly appoint a successor
Relevant Trustee or Trustees, and such successor Trustee or Trustees shall
comply with the applicable requirements of Section 3.03 or Section 3.04, as the
case may be. If no successor Relevant Trustee shall have been so appointed by
the Litigation Trustees and accepted appointment in the manner required by this
Section 3.05, within 30 days after delivery of notification of removal or after
the Litigation Trust receives notice of the Delaware Trustee's death,
incompetence or incapacity, any Holder who has been a Holder of CPR Certificates
for at least six months may, on behalf of himself and all others similarly
situated, or the Relevant Trustee being removed may, petition any court of
competent jurisdiction for the appointment of a successor Relevant Trustee. Such
court may thereupon, after prescribing such notice, if any, as it may deem
proper, appoint a successor Relevant Trustee or Trustees.

    (d) The Institutional Trustee shall give notice of each appointment of a
successor Relevant Trustee to all Holders. Each notice shall include the name of
the successor Relevant Trustee and the address of its Corporate Trust Office if
it is the Institutional Trustee.

    (e) In the case of the appointment hereunder of a successor Relevant
Trustee, the retiring Relevant Trustee (except in the case of the death,
incompetence or incapacity of a Delaware Trustee who is a natural person) and
each successor Relevant Trustee shall execute and deliver an amendment hereto
wherein each successor Relevant Trustee shall accept such appointment and which
shall contain such provisions as shall be necessary or desirable to transfer and
confirm to, and to vest in, each successor Relevant Trustee all the rights,
powers and duties of the retiring Relevant Trustee with respect to the CPR
Certificates and the Litigation Trust; it being understood that nothing herein
or in such amendment shall designate such Relevant Trustees as co-Trustees and
upon the execution and delivery of such amendment the resignation or removal of
the retiring Relevant Trustee shall become effective to the extent provided
therein and each such successor Relevant Trustee, without any further act, deed
or conveyance, shall become vested with all the rights, powers and duties of the
retiring Relevant Trustee; but, on request of the Litigation Trust or any
successor Relevant Trustee, such retiring Relevant Trustee shall duly assign,
transfer and deliver to such successor Relevant Trustee all Litigation Trust
Property, all proceeds thereof and money held by such retiring Relevant Trustee
hereunder with respect to the CPR Certificates and the Litigation Trust.

    (f) No Institutional Trustee or Delaware Trustee shall be liable for the
acts or omissions to act of any Successor Institutional Trustee or Successor
Delaware Trustee, as the case may be.

    (g) Any Person into which the Institutional Trustee or the Delaware Trustee,
as the case may be, may be merged or converted or with which either may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which the Institutional Trustee or the Delaware Trustee, as the
case may be, shall be a party, or any Person succeeding to all or substantially
all the corporate trust business of the Institutional Trustee or the Delaware
Trustee, as the case may be, shall be the successor of the Institutional Trustee
or the Delaware Trustee, as the case may be, hereunder, without the execution or
filing of any paper or any further act on the part of any of the parties hereto;
PROVIDED that such Person shall be otherwise qualified and eligible under this
Article.

                                      A-11
<PAGE>
    Section 3.06  VACANCIES AMONG RELEVANT TRUSTEES; EFFECT OF VACANCIES.

    The death, resignation, retirement, removal, bankruptcy, dissolution,
liquidation, incompetence or incapacity to perform the duties of a Trustee shall
not operate to dissolve, terminate or annul the Litigation Trust. Whenever a
vacancy in the Institutional Trustee or the Delaware Trustee shall occur, until
such vacancy is filled by the appointment of a Trustee in accordance with
Section 3.05, the Institutional Trustee or the Delaware Trustee (as the case may
be) remaining in office shall have all the powers granted to both the
Institutional Trustee and the Delaware Trustee and shall discharge all the
duties imposed upon both the Institutional Trustee and the Delaware Trustee by
this Declaration.

    Section 3.07  THE LITIGATION TRUSTEES.

    (a) There shall be at all times no fewer than two Trustees (the "Litigation
Trustees") who shall be natural persons over the age of 21 years and who shall
have the powers, duties and responsibilities of the Litigation Trustees
hereunder. The initial Litigation Trustees shall be Jonathan K. Heffron and
Salvatore A. Ranieri.

    (b) In compensation for his services as Litigation Trustee, each Litigation
Trustee shall be entitled to the payments and rights set forth in the Litigation
Trustee Agreements. Upon appointment of a successor Litigation Trustee by the
remaining Litigation Trustees pursuant to Section 3.10, such successor
Litigation Trustee shall receive fees as determined by the other Litigation
Trustees (but in no event more than the fees payable to an initial Litigation
Trustee).

    Section 3.08  LIMITATION ON LIABILITY OF LITIGATION TRUSTEES.  As set forth
in Section 11.02(a), the Litigation Trustees will have no liability to any
Indemnified Person or any member of the Bank United Group unless it shall be
established in a final and nonappealable judicial determination by clear and
convincing evidence that any decision or action of the Litigation Trustees was
undertaken with deliberate intent to injure the Holders or with reckless
disregard for the best interests of such Holders, and, in any event, any
liability will be limited to actual, proximate, and quantifiable damages.

    Section 3.09  RESIGNATION OF A LITIGATION TRUSTEE.  Any Litigation Trustee
may resign as such by executing an instrument in writing and delivering that
instrument to the remaining Litigation Trustee or Trustees, if any, and to the
Institutional Trustee. In the event of the resignation of a Litigation Trustee,
such Litigation Trustee shall promptly: (a) execute and deliver such documents,
instruments and other writings as may be reasonably requested by the remaining
Litigation Trustees or Litigation Trustee, or if there is no Litigation Trustee,
the Institutional Trustee, to effect the termination of such Litigation
Trustee's capacity under this Declaration; (b) deliver to the remaining
Litigation Trustees or Litigation Trustee all assets, documents, instruments,
records and other writings related to the Litigation Trust as may be in the
possession of such Trustee; and (c) otherwise assist and cooperate in effecting
the assumption of such Litigation Trustee's obligations and functions by his
successor Litigation Trustee.

    Section 3.10  APPOINTMENT OF SUCCESSOR LITIGATION TRUSTEES.

    (a) Upon the death, resignation or incompetency (determined by a court of
competent jurisdiction) of a Litigation Trustee, the remaining Litigation
Trustee or Litigation Trustees, and no other Person, shall have the power to
appoint a successor Litigation Trustee or Trustees, as applicable. In the event
of the death, resignation or incompetency (as determined by a court of competent
jurisdiction) of all of the Litigation Trustees so that there are no remaining
Litigation Trustees, two Litigation Trustees shall be appointed by the written
decision of a majority of the members of the Bank United Litigation Committee,
or, if such committee is not in existence, a majority of the Persons still
living who constituted the Board of Directors of the Sponsor immediately prior
to the Effective Time.

    Such appointment shall specify the date on which such appointment shall be
effective. Every successor Litigation Trustee appointed hereunder shall execute,
acknowledge and deliver to the remaining Litigation Trustees (or, in the event
there are no remaining Litigation Trustees, the Bank

                                      A-12
<PAGE>
United Litigation Committee or, if such committee is not in existence, the
persons who were members of the Board of Directors of the Sponsor immediately
prior to the Effective Time) and to the Institutional Trustee an instrument
accepting such appointment, and thereupon such successor Litigation Trustee,
without any further act, deed or conveyance, shall become vested with all the
rights, powers, Litigation Trusts and duties of a Litigation Trustee. No
successor Litigation Trustee shall have any duty to investigate the
administration of the Litigation Trust or the management of the Litigation for
any period prior to the effective date of such successor Litigation Trustee's
appointment, and no resigning Litigation Trustee shall be required or permitted,
prior to final termination of the Litigation (including any proceedings to
collect any recovery due the Litigation Trustees), to file any accounting
proceeding.

    (b) The Holders will have no right to vote to appoint, remove or replace the
Litigation Trustees, which rights are vested exclusively in the Litigation
Trustees and, to the extent set forth in Section 3.10(a), the Bank United
Litigation Committee or, if such committee is not in existence, the persons who
were members of the Board of Directors of Sponsor immediately prior to the
Effective Time.

    Section 3.11  MEETINGS OF THE TRUSTEES.

    (a) Meetings of the Delaware Trustee, the Institutional Trustee and the
Litigation Trustees together may be held from time to time upon the call of the
Delaware Trustee, Institutional Trustee or any Litigation Trustee. Notice of any
in-person meetings of the Trustees shall be hand delivered or otherwise
delivered in writing (including by facsimile, with a hard copy by overnight
mail) not less than five Business Days before such meeting. Notice of any
telephonic meetings of such Trustees shall be hand delivered or otherwise
delivered in writing (including by facsimile, with a hard copy by overnight
mail) not less than two Business Days before a meeting. Notices shall contain a
brief statement of the time, place and anticipated purposes of the meeting. The
presence (whether in person or by telephone) of a Trustee at a meeting shall
constitute a waiver of notice of such meeting except where such Trustee attends
a meeting for the express purpose of objecting to the transaction of any
activity on the ground that the meeting has not been lawfully called or
convened. Any Trustee may also waive such notice of in-person or telephonic
meetings in writing by hand delivering or otherwise delivering (including by
facsimile, with a hard copy by overnight mail) such written waiver to all other
Trustees. Unless provided otherwise in this Declaration, any action to be taken
by the Institutional Trustee together with the Litigation Trustees shall be
taken with the approval of the Institutional Trustee and each Litigation Trustee
(provided, that if there shall be more than two Litigation Trustees, a majority
of the Litigation Trustees voting in favor of an action shall constitute
approval by the Litigation Trustees unless otherwise provided in this
Declaration).

    (b) The Litigation Trustees may adopt their own rules and procedures but,
unless otherwise provided by this Declaration, may act only with the unanimous
agreement of the two Litigation Trustees or the agreement of the sole remaining
Litigation Trustee prior to the appointment of a successor Litigation Trustee
pursuant to Section 3.10. The Litigation Trustees may, in their discretion,
delegate to one or more of the Litigation Trustees the authority to act on
behalf of the Litigation Trustees as the Litigation Trustees may determine
appropriate (other than with respect to the retention or dismissal of counsel
for the Sponsor or Bank United (or any successor thereto) or the Litigation
Trustees, or the approval of a settlement or dismissal of the Litigation).
Following the date hereof and prior to the effective time of the Washington
Mutual Merger, the initial Litigation Trustees and the Board of Directors of
Bank United Corp., in their sole discretion, may establish a committee comprised
of present or former members of the Board of Directors of Bank United Corp., or
such other persons as may be appointed by such Board, to assist and advise the
Litigation Trustees in connection with the Litigation (the "Bank United
Litigation Committee").

                                      A-13
<PAGE>
    Section 3.12  POWERS AND DUTIES OF SPONSOR, LITIGATION TRUSTEES AND
INSTITUTIONAL TRUSTEE.

    (a) The Sponsor prior to the Effective Time, and the Institutional Trustee
and the Litigation Trustees, shall have the authority, subject to any
limitations set forth in Section 2.03, to conduct the affairs of the Litigation
Trust in accordance with the terms of this Declaration and the Recovery
Agreement.

    (b) In addition, prior to the Effective Time, the Sponsor shall have the
authority to take the actions enumerated in (i) below on behalf of the
Litigation Trust and, in connection therewith, to enter into all transactions
and agreements determined by the Sponsor to be appropriate in exercising such
authority and to perform all acts in furtherance thereof:

        (i) The Sponsor shall have the power and authority prior to the
    Effective Time and is hereby authorized to act on behalf of the Litigation
    Trust prior to the Effective Time with respect to the following matters:

           (A) the issuance of the CPR Certificates issued immediately prior to
       the Effective Time;

           (B) the execution of the CPR Certificates issued immediately prior to
       the Effective Time in accordance with this Declaration;

           (C) compliance with (or obtaining or qualifying for exceptions from)
       the Securities Act, the Exchange Act or applicable state securities or
       blue sky laws;

           (D) the execution and filing of the registration statement under the
       Securities Act to register the CPR Certificates to be issued to the
       Sponsor immediately prior to the Effective Time and prospectuses
       (including any amendments or supplements thereto) and the preparation and
       filing of all documents filed therewith;

           (E) the use of its best efforts to permit trading of the CPR
       Certificates pursuant to the NASDAQ National Market System (or if,
       despite such best efforts, trading on the NASDAQ National Market System
       is not possible, on such other NASDAQ market or other market as shall, in
       the good faith judgment of the Sponsor, provide maximum available
       liquidity), commencing on the Effective Date and continuing until such
       time as there are fewer than 400 Holders;

           (F) the notification of the Institutional Trustee and the Litigation
       Trustees in writing when the CPR Certificates are listed on any stock
       exchange or quoted on any automated quotation system, if prior to the
       Effective Time; and

           (G) the taking of any other actions necessary or desirable to carry
       out any of the foregoing activities.

        (ii) The Trustees on behalf of the Litigation Trust hereby (a) ratify
    and approve all actions taken by the Sponsor on behalf of the Litigation
    Trust or for its benefit prior to the Effective Time and all transactions
    and agreements entered into in connection therewith; and (b) agree and
    acknowledge that the Sponsor shall have no liability to the Litigation
    Trust, the Trustees or the Holders for any such actions, transactions or
    agreements and that the Litigation Trust, the Trustees and the Holders shall
    no right to enforce, institute or maintain a suit, action or proceeding
    against the Sponsor, its successors or their respective affiliates,
    officers, directors, employees or agents relating to such actions,
    transactions or agreements; it being understood that this
    Section 3.12(a)(ii) does not constitute a waiver by the Litigation Trustees
    of their rights under Section 7.8 of the Merger Agreement or a waiver by the
    Trustees or the Litigation Trust of their rights under the Commitment.

    (c) in accordance with subparagraphs (i) and (ii) of this Section 3.12(b),
the Institutional Trustee and the Litigation Trustees shall have the authority
to enter into all transactions and agreements

                                      A-14
<PAGE>
determined by such Trustees to be appropriate in exercising the authority,
express or implied, otherwise granted to such Trustees under this Declaration,
and to perform all acts in furtherance thereof (and all such transactions or
agreements entered into or acts performed prior to the date hereof are hereby
ratified and approved), including, without limitation, the following:

        (i) The Litigation Trustees shall have the power and authority and are
    authorized to act on behalf of the Litigation Trust with respect to the
    following matters and such other powers and authority as provided in the
    Litigation Trustee Agreements:

           (A) the issuance and determination of the terms (including the
       quantity and price) of any CPR Certificates issued after the Effective
       Time in accordance with this Declaration;

           (B) the execution of any CPR Certificates issued after the Effective
       Time in accordance with this Declaration;

           (C) after the Effective Time, the execution and delivery on behalf of
       the Litigation Trust, subject to Section 2.03(b), of any agreement with
       the Sponsor, and such other agreements as may, in the opinion of a
       majority of the Litigation Trustees, be necessary or desirable in
       connection with the Litigation Trust Purposes, including agreements with
       the Depositary and the Paying Agent;

           (D) after the Effective Time, compliance with (or obtaining or
       qualifying for exceptions from) the Securities Act, the Exchange Act or
       applicable state securities or blue sky laws or other applicable laws;

           (E) after the Effective Time, the execution and filing of one or more
       registration statements and prospectuses (including any amendments or
       supplements thereto) relating to the CPR Certificates and the preparation
       and filing of all periodic and other reports and other documents pursuant
       to the foregoing;

           (F) after the Effective Time, the continuation of the designation of
       the CPR Certificates for trading on any national stock exchange or
       quotation on the NASDAQ Stock Market's National Market System or other
       automated quotation system until such time as there are fewer than 400
       Holders or such time as the CPR Certificates are no longer eligible for
       such designation on any such exchange or quotation system;

           (G) the carrying out of any of the powers or obligations of the
       Litigation Trust or of the Litigation Trustees under the Commitment;

           (H) upon the effectiveness of the Commitment and as necessary
       thereafter, the instruction of the Sponsor and Bank United and their
       successors as to the prosecution, appeal, resolution, settlement,
       compromise or other means of pursuing the Litigation and the taking of
       any action in connection with the prosecution of the Litigation by the
       Sponsor and Bank United (or any successor to such Persons) or as
       permitted by Article VI hereof;

           (I) the payment of all expenses of the Litigation Trust (including,
       without limitation, expenses of the Litigation, compensation and expenses
       of the Trustees, liability insurance and indemnification obligations) out
       of the funds of the Litigation Trust, including amounts received pursuant
       to the Commitment, the Retained Amount and any other source (including,
       without limitation, funds raised pursuant to Section 2.3(c));

           (J) the sending of notices (other than notice of default), and other
       information regarding the CPR Certificates to the Holders in accordance
       with this Declaration;

           (K) the taking of any action to cause the Litigation Trust not to be
       deemed to be an Investment Company under the Investment Company Act;

                                      A-15
<PAGE>
           (L) the amendment of the Commitment subject to Section 2.03(b);

           (M) the bringing, defense, payment, collection, compromise, taking of
       legal action, or other adjustment of claims or demands of or against the
       Sponsor or its successors which arise out of or in connection with a
       breach by the Sponsor (or any successor thereto) of any of its
       obligations under the Commitment, the Payment Trust of any of its
       obligations under the Commitment or, subject to the limitations set forth
       in Section 3.12(a)(ii), the Sponsor of any of its obligations hereunder;

           (N) the approval of all applicable tax returns and tax information to
       be filed by the Institutional Trustee with respect to the Litigation
       Trust on behalf of the Litigation Trust;

           (O) the compliance by the Litigation Trust with the indemnification
       obligations of the Litigation Trust; and

           (P) the taking of any other actions necessary or desirable to carry
       out any of the foregoing activities.

        (ii) The Institutional Trustee shall have the power, duty and authority
    and is hereby authorized to act on behalf of the Litigation Trust with
    respect to the following matters:

           (A) the authentication of the CPR Certificates in accordance with
       this Declaration;

           (B) the application for a taxpayer identification number;

           (C) the maintenance of the funds of the Litigation Trust in a
       non-interest bearing demand deposit account at Bank United;

           (D) upon receipt of a Proceeds Amount, and at the written direction
       of the Litigation Trustees, the investment of the Proceeds Amount, until
       disbursed pursuant to the terms of this Declaration, in a Permitted
       Investment which is not sold prior to the date the Payment Amount is to
       be disbursed to the Holders;

           (E) the distribution through the Paying Agent of the Payment Amount
       and other amounts owed to the Holders in respect of the CPR Certificates
       in accordance with the terms of this Declaration;

           (F) the sending of notices of a breach by the Sponsor of its
       obligations under the Commitment or a breach by the Sponsor of its
       obligations under this Declaration or default by the Litigation Trust of
       its payment obligations pursuant to Article IV hereof;

           (G) the execution and delivery of letters or documents to, or
       instruments with, the Depositary relating to the CPR Certificates;

           (H) to the extent provided in this Declaration, the winding up of the
       affairs of and liquidation of the Litigation Trust and the execution and
       filing of the certificate of cancellation with the Secretary of State of
       the State of Delaware;

           (I) the due preparation and filing, with the approval of the
       Litigation Trustees, of all applicable tax returns and tax information
       reports that are required to be filed with respect to the Litigation
       Trust;

           (J) the taking of all actions that may be necessary or appropriate
       for the preservation and the continuation of the Litigation Trust's valid
       existence, rights, franchises and privileges as a statutory business
       trust under the laws of the State of Delaware and of each other
       jurisdiction in which such existence is necessary to protect the limited
       liability of the Holders or to enable the Litigation Trust to effect the
       Litigation Trust Purposes;

                                      A-16
<PAGE>
           (K) the bringing, defense, payment, collection, compromise,
       arbitration, taking of legal action, or other adjustment of claims or
       demands of or against the Sponsor or its successors or the Litigation
       Trust which arise out of or in connection with a breach by the Sponsor of
       any of its obligations under the Commitment, the Payment Trust of any of
       its obligations under the Commitment, or, subject to the limitations set
       forth in Section 3.12(a)(ii), by the Sponsor of any of its obligations
       hereunder;

           (L) the taking of all actions and performance of such duties as may
       be specifically required of the Institutional Trustee pursuant to the
       terms of the CPR Certificates; and

           (M) the taking of any action incidental to the foregoing as the
       Institutional Trustee may from time to time determine to be necessary or
       advisable to give effect to the terms of this Declaration for the benefit
       of the Holders (without consideration of the effect of any such action on
       any particular Holder).

        (iii) The Institutional Trustee shall have the power and authority to
    act on behalf of the Litigation Trust with respect to any of the duties,
    liabilities, powers or the authority of the Litigation Trustees set forth in
    Section 3.12(b)(i)(J) herein but shall not have a duty to do any such act
    unless specifically requested to do so in writing by the Litigation
    Trustees, and shall then be fully protected in acting pursuant to such
    written request; and in the event of a conflict between the action of the
    Litigation Trustees and the action of the Institutional Trustee, the action
    of the Institutional Trustee shall prevail.

    (d) The Trustees are authorized and directed to conduct the affairs of the
Litigation Trust and to operate the Litigation Trust so that the Litigation
Trust will not fail to be classified as a grantor trust for United States
federal income tax purposes. In this connection, the Trustees are authorized to
take any action, not inconsistent with applicable laws, the Certificate of
Litigation Trust or this Declaration, as amended from time to time, that the
Institutional Trustee or the Litigation Trustees, as the case may be, determines
in their discretion to be necessary or desirable for such purpose, even if such
action adversely affects the interests of the Holders.

    (e) The Litigation Trustees may consult with counsel (which counsel may be
counsel to the Litigation Trust or counsel to any member of the Bank United
Group), outside consultants, advisors and other Persons as to matters the
Litigation Trustees reasonably believe are within such other Person's
professional or expert competence, and the advice of such Persons shall be full
and complete authorization and protection in respect of any action taken,
suffered or omitted by them hereunder in good faith reliance on such advise. All
oral or written communications between any such counsel on the one hand, and the
Sponsor, Bank United, the Litigation Trust, any Trustee, the Payment Trust, the
Payment Trust Trustees any of their affiliates, or any successor entity or any
affiliate of any successor entity, on the other hand, will be protected by the
attorney-client privilege and/or the attorney work product doctrine, and no such
communication will result in the waiver of any applicable claim of
confidentiality or privilege.

    (f) Any Trustee may also be a Holder or an officer, director, employee or
Affiliate of a Holder, and will have all the rights of such a Holder to the same
extent as if such Trustee were not a Trustee.

    Section 3.13  CERTAIN DUTIES AND RESPONSIBILITIES OF THE TRUSTEES.

    (a) The Institutional Trustee, before the occurrence of any breach by the
Sponsor or the Payment Trust of any of their obligations under the Commitment or
a breach by the Sponsor after the Effective Time of any of its obligations under
this Declaration, and after the curing of any such breach by the Payment Trust
or the Sponsor, shall undertake to perform only such duties as are specifically
set forth in this Declaration and no implied covenants shall be read into this
Declaration against the Institutional Trustee. In case of a breach by either the
Sponsor or the Payment Trust of any of their obligations under the Commitment or
a breach by the Sponsor of its obligations hereunder after the

                                      A-17
<PAGE>
Effective Time, the Institutional Trustee shall exercise such of the rights and
powers vested in it by this Declaration and use the same degree of care and
skill in their exercise as a prudent person would exercise or use under the
circumstances in the conduct of his or her own affairs.

    (b) The duties and responsibilities of the Trustees shall be as provided by
this Declaration and the Business Trust Act. Notwithstanding the foregoing, no
provision of this Declaration shall require any Trustee to expend or risk such
Trustee's own funds or otherwise incur any financial liability in the
performance of any of such Trustee's duties hereunder, or in the exercise of any
of such Trustee's rights or powers. Whether or not therein expressly so
provided, every provision of this Declaration relating to the conduct or
affecting the liability of or affording protection to the Trustees shall be
subject to the provisions of this Article. To the extent that, at law or in
equity, a Trustee has duties and liabilities relating to the Litigation Trust or
to the Holders, such Trustee shall not be liable to the Litigation Trust or to
any Holder for such Trustee's good faith reliance on the provisions of this
Declaration. The provisions of this Declaration, to the extent that they
restrict the duties and liabilities of the Trustees otherwise existing at law or
in equity, are agreed by the Litigation Trust and the Holders to replace such
other duties and liabilities of the Trustees.

    (c) All payments made by the Institutional Trustee or a Paying Agent in
respect of the CPR Certificates shall be made only from (i) payments received by
the Litigation Trust from the Payment Trust and only to the extent that the
Payment Amount is greater than zero or upon the expiration of the Retained
Amount Period, any remaining portion of the Retained Amount is greater than
zero, in each case so as to enable the Institutional Trustee or a Paying Agent
to make payments in accordance with the terms hereof and (ii) proceeds from the
liquidation of other assets of the Litigation Trust upon the winding up of the
Litigation Trust. Each Holder, by its acceptance of a CPR Ceritificate, agrees
that it will look solely to the Payment Amount and, upon the expiration of the
Retained Amount Period, to any remaining portion of the Retained Amount, to the
extent legally available for distribution to it as herein provided and that the
Trustees are not personally liable to such Holder for any amount distributable
in respect of any CPR Ceritificate or for any other liability in respect of any
CPR Ceritificate.

    (d) No provision of this Declaration shall be construed to relieve the
Institutional Trustee from liability with respect to matters that are within the
authority of the Institutional Trustee under this Declaration for its own bad
faith, its own grossly negligent action, its own grossly negligent failure to
act, or its own willful misconduct, except that:

        (i) the Institutional Trustee shall not be liable for any error or
    judgment made in good faith by an authorized officer of the Institutional
    Trustee, unless it shall be proved that the Institutional Trustee was
    negligent in ascertaining the pertinent facts;

        (ii) the Institutional Trustee shall not be liable with respect to any
    action taken or omitted to be taken by it in good faith in accordance with
    the direction of the Holders of not less than a majority of the CPR
    Certificates then outstanding, relating to the time, method and place of
    conducting any proceeding for any remedy available to the Institutional
    Trustee, or exercising any Litigation Trust or power conferred upon the
    Institutional Trustee under this Declaration;

        (iii) the Institutional Trustee's sole duty with respect to the custody,
    safe-keeping and physical preservation of the Payment Amount shall be to
    deal with such property in a similar manner as the Institutional Trustee
    deals with similar property for its own account, subject to the protections
    and limitations on liability afforded to the Institutional Trustee under
    this Declaration;

        (iv) the Institutional Trustee shall not be liable for any interest on
    any money received by it except as it may otherwise agree in writing with
    the Litigation Trustees; and money held by the Institutional Trustee need
    not be segregated from other funds held by it except in relation to the
    Proceeds Amount maintained by the Institutional Trustee pursuant to
    Section 3.12(b)(ii)(d) and except to the extent otherwise required by law.

                                      A-18
<PAGE>
    Section 3.14  CERTAIN RIGHTS OF THE INSTITUTIONAL TRUSTEE.  Subject to the
provisions of Section 3.13:

    (a) the Institutional Trustee may conclusively rely and shall fully be
protected in acting or refraining from acting in good faith upon any resolution,
opinion of counsel, certificate, written representation of a Holder, transferee
or Litigation Trustee, certificate of auditors or any other certificate,
statement, instrument, opinion, report, notice, request, direction, consent,
order, approval, CPR Ceritificate, bond, debenture, note, other evidence of
indebtedness or other paper or document believed by it to be genuine and to have
been signed, sent or presented by the proper party or parties;

    (b) if (i) in performing its duties under this Declaration, the
Institutional Trustee is required to decide between alternative courses of
action, or (ii) in construing any of the provisions of this Declaration, the
Institutional Trustee finds the same ambiguous or inconsistent with any other
provisions contained herein, or (iii) the Institutional Trustee is unsure of the
application of any provision of this Declaration, then, except as to any matter
as to which the Holders are entitled to vote under the terms of this
Declaration, the Institutional Trustee shall take such action, or refrain from
taking such action, as the Institutional Trustee in its sole discretion shall
deem advisable and in the best interests of the Holders, in which event the
Institutional Trustee shall have no liability except for its own bad faith,
negligence or willful misconduct;

    (c) any direction or act of the Litigation Trustees contemplated by this
Declaration shall be sufficiently evidenced by an Officers' Certificate;

    (d) the Institutional Trustee may consult with counsel (which counsel may be
counsel to the Litigation Trustees or appointed by the Sponsor or Bank United
(or any successor to such Persons) at the direction of the Litigation Trustees
to prosecute the Litigation) and the advice of such counsel shall be full and
complete authorization and protection in respect of any action taken, suffered
or omitted by it hereunder in good faith and in reliance thereon and in
accordance with such advice; the Institutional Trustee shall have the right at
any time to seek instructions concerning the administration of this Declaration
from any court of competent jurisdiction. All oral or written communications
between any such counsel on the one hand, and the Sponsor, Bank United, the
Litigation Trust, any Trustee, any of their affiliates, or any successor entity
or any affiliate of any successor entity, on the other hand, will be protected
by the attorney-client privilege and/or the attorney work product doctrine, and
no such communication will result in the waiver of any applicable claim of
confidentiality or privilege.

    (e) the Institutional Trustee shall be under no obligation to exercise any
of the rights or powers vested in it by this Declaration at the request or
direction of any of the Holders pursuant to this Declaration, unless such
Holders shall have offered to the Institutional Trustee security or indemnity
reasonably satisfactory to it against the costs, expenses and liabilities which
might be incurred by it in compliance with such request or direction, provided
that nothing contained in this Section 3.14(e) shall be taken to relieve the
Institutional Trustee, upon breach by the Sponsor of any of its obligations
under the Commitment, or by the Sponsor or its successors after the Effective
Time of any of the obligations of the Sponsor hereunder, of its obligation to
exercise, upon the instructions of the Litigation Trustees, the rights and
powers vested in it by this Declaration;

    (f) the Institutional Trustee shall not be required to make any
investigation into the facts or matters stated in any resolution, certificate,
statement, instrument, opinion, report, notice, request, consent, order,
approval, CPR Ceritificate, bond, debenture, note or other evidence of
indebtedness or other paper or document, unless requested in writing to do so by
a majority of the Holders of CPR Certificates then outstanding, but the
Institutional Trustee may make such further inquiry or investigation into such
facts or matters as it may see fit;

    (g) except as otherwise expressly provided in this Declaration, the
Institutional Trustee shall not be under any obligation to take any action that
is discretionary under the provisions of this Declaration;

                                      A-19
<PAGE>
    (h) any action taken by the Institutional Trustee or its agents authorized
by this Declaration to be taken by the Institutional Trustee shall bind the
Litigation Trust and the Holders, and the signature of the Institutional Trustee
or its agents alone shall be sufficient and effective to perform any such action
and no third party shall be required to inquire as to the authority of the
Institutional Trustee to so act or as to its compliance with any of the terms
and provisions of this Declaration, both of which shall be conclusively
evidenced by the Institutional Trustee's or its agent's taking such action;

    (i) no provision of this Declaration shall be deemed to impose any duty or
obligation on the Institutional Trustee to perform any act or acts or exercise
any right, power, duty or obligation conferred or imposed on it, in any
jurisdiction in which it shall be illegal, or in which the Institutional Trustee
shall be unqualified or incompetent in accordance with applicable law, to
perform any such act or acts, or to exercise any such right, power, duty or
obligation. No permissive power or authority available to the Institutional
Trustee shall be construed to be a duty;

    (j) whenever in the administration of the provisions of this Declaration the
Institutional Trustee shall deem it necessary or desirable that a matter be
proved or established prior to taking or suffering any action to be taken
hereunder, such matter (unless other evidence in respect thereof be herein
specifically prescribed) may, in the absence of gross negligence or bad faith on
the part of the Institutional Trustee, be deemed to be conclusively proved and
established by an Officer's Certificate delivered to the Institutional Trustee
and such certificate, in the absence of gross negligence or bad faith on the
part of the Institutional Trustee, shall be full warrant to the Institutional
Trustee for any action taken, suffered or omitted by it under the provisions of
this Declaration upon the faith thereof;

    (k) in no event shall the Institutional Trustee be liable for the selection
of investments for funds permitted to be invested hereunder or for investment
losses thereon, and the Institutional Trustee shall have no liability in respect
of losses incurred as a result of the liquidation of any investment prior to its
stated maturity or the failure of the Litigation Trustees to provide timely
written investment direction with respect to funds permitted to be invested
hereunder;

    (l) the Institutional Trustee may execute any of its powers hereunder or
perform any duties hereunder either directly or by or through agents, attorneys,
custodians or nominees appointed with due care, and shall not be responsible for
any willful misconduct or gross negligence on the part of, or for the
supervision of, any agent, attorney, custodian or nominee so appointed; and

    (m) the Institutional Trustee shall not be deemed to have notice of the
occurrence of the events described in Section 3.19 unless the Institutional
Trustee shall have received written notice of such event or a Responsible
Officer of the Institutional Trustee shall have obtained actual knowledge
thereof.

    Section 3.15  LISTS OF HOLDERS OF CPR CERTIFICATES.

    (a) At the Effective Time, the Sponsor shall provide to the Institutional
Trustee a list (the "List of Holders"), in such form as the Institutional
Trustee may reasonably require, of the names and addresses of the Holders as of
immediately prior to the Effective Time;

    (b) The Paying Agent, if other than the Institutional Trustee, shall provide
to the Institutional Trustee a List of Holders upon the request of the
Institutional Trustee; and

    (c) The Institutional Trustee shall preserve, in as current a form as is
reasonably practicable, all information contained in any List of Holders given
to it or which it receives in its capacity as Paying Agent (if acting in such
capacity), PROVIDED that the Institutional Trustee may destroy any List of
Holders previously given to it on receipt of a new List of Holders;

    Section 3.16  EXECUTION OF DOCUMENTS.

    (a) Unless otherwise determined in writing by the Institutional Trustee, and
except as otherwise required by the Business Trust Act, the Institutional
Trustee, or any one or more of the Litigation

                                      A-20
<PAGE>
Trustees, as the case may be, is authorized to execute on behalf of the
Litigation Trust any documents that the Institutional Trustee or the Litigation
Trustees, as the case may be, have the power and authority to execute pursuant
to Section 3.12.

    (b) Any Institutional or Delaware Trustee may, by power of attorney
consistent with applicable law, delegate to any other natural person over the
age of 21 his or her or its power for the purpose of executing any documents
contemplated in Section 3.12.

    Section 3.17  NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF CPR
CERTIFICATES.  The recitals contained in this Declaration and the CPR
Certificates shall be taken as the statements of the Litigation Trust, and the
Trustees do not assume any responsibility for their correctness. The Sponsor and
the Trustees make no representations as to the value or condition of the
Litigation Trust Property or any part thereof. Except as otherwise specifically
provided in Article XIV, the Sponsor and the Trustees make no representations as
to the validity or sufficiency of this Declaration or the CPR Certificates.

    Section 3.18  FILINGS WITH THE COMMISSION.  So long as the Litigation Trust
is subject to the reporting obligations of the Exchange Act, the Litigation
Trustees shall, on behalf of the Litigation Trust, cause to be prepared and
filed with the Commission quarterly reports on Form 10-Q and an annual report on
Form 10-K. Unless otherwise required by the Commission, such reports will
contain only an overview of the status of the Litigation and disclosure of the
amounts that have been expended for the relevant period and any contingent or
incurred but unpaid expenses (including compensation deferred by the Litigation
Trustees) that the Litigation Trust will be obligated to pay in the future. The
Litigation Trustees shall also, on behalf of the Litigation Trust, cause to be
prepared and filed with the Commission, reports on Form 8-K upon the occurrence
of a material judicial decision in the Litigation or in the event of any
agreement to settle the Litigation. It is hereby agreed and understood that such
reports on Form 10-Q, 10-K or 8-K will not include financial statements or any
valuation of the Litigation.

    Section 3.19  DEFAULT; NOTICE.  The Institutional Trustee shall, within
90 days after the occurrence of (i) a breach by the Sponsor of any of its
payment obligations under the Commitment, (ii) a breach by the Sponsor after the
Effective Time of its obligations hereunder, (iii) a default by the Litigation
Trust in payment of the Payment Amount to the Holders pursuant to Article IV
hereof, (iv) a default by the Litigation Trust upon the expiration of the
Retained Amount Period in payment of any remaining portion of the Retained
Amount pursuant to Article IV hereof, or (v) a breach by the Payment Trust of
its obligations under the Commitment, transmit by mail, first class postage
prepaid, to the Holders, notice of such default actually known to a Responsible
Officer of the Institutional Trustee, unless such default has been cured before
the giving of such notice; PROVIDED, HOWEVER, the Institutional Trustee shall be
protected in withholding such notice if and so long as a Responsible Officer of
the Institutional Trustee in good faith determines that the withholding of such
notice is in the best interests of the Holders.

                                  ARTICLE IV.
                              PAYMENTS TO HOLDERS

    Section 4.01  PAYMENT TO HOLDERS.

    (a) The Litigation Trust will make payments from time to time to the Holders
of the Payment Amounts upon the receipt of the applicable payments of the
Proceeds Amount from the Payment Trust. Each CPR Ceritificate will entitle the
Holder thereof to receive a fraction (equal to 1 divided by the total number of
CPR Certificates then outstanding) of any Payment Amount within 60 days after
the Litigation Trust receives a Proceeds Amount.

    (b) Within 90 days of the expiration of the Retained Amount Period, the
Litigation Trust will pay to the Holders any remaining portion of the Retained
Amount. Each CPR Ceritificate will entitle the

                                      A-21
<PAGE>
Holder thereof to receive a fraction (equal to 1 divided by the total number of
CPR Certificates then outstanding) of the remaining portion of the Retained
Amount.

    Section 4.02  TIMING OF PAYMENTS.  The Litigation Trust will make payments
of amounts as contemplated by Section 4.1 to the Holders as of record dates
determined by the Litigation Trustees. Payment will be made on payment dates,
which will also be set by the Litigation Trustees. The Litigation Trustees shall
promptly notify the Institutional Trustee in writing of any such dates.

    Section 4.03  DEFAULT; WAIVER.  The Holders of a majority of the CPR
Certificates then outstanding may, by vote or consent, on behalf of the Holders
of all of the CPR Certificates, waive any breach by the Sponsor of any of its
obligations under the Commitment, any failure by the Payment Trust to fulfill
its obligations under the Commitment with respect to the Litigation Trust, or
any default by the Litigation Trust in payment of the Payment Amount or the
funds remaining in the Retained Amount to the Holders pursuant to this
Article IV.

                                   ARTICLE V.
                        EXPENSES AND THE RETAINED AMOUNT

    Section 5.01  EXPENSES.  The Litigation Trustees on behalf of the Litigation
Trust shall have the right to draw on the funds of the Litigation Trust for the
purpose of funding any expenses of the Litigation Trust, including
administration expenses, expenses of the Litigation, compensation, fees and
expenses of the Trustees, amounts paid as indemnity to any Indemnified Person,
premiums for insurance for the Litigation Trustees, and fees and expenses of
attorneys, consultants and other experts retained by, or at the direction of,
the Litigation Trustees, pursuant to Section 6.02.

    Section 5.02  RETURN OF FUNDS.  Pursuant to Section 2.08 of the Commitment,
if (x) the amount of the Litigation Proceeds is such that there would be no
Commitment Amount payable under the Commitment to the Payment Trust and
(y) immediately prior to the termination of the Litigation Trust as provided by
this Declaration and the Commitment the Litigation Trust retains any funds
provided to the Litigation Trust pursuant to Section 2.04 of the Commitment but
not used, the Litigation Trust shall refund to the Sponsor such amounts less
expenses necessary, in the reasonable judgment of the Litigation Trustees, to
terminate the Litigation Trust pursuant to the terms of this Declaration and the
Commitment.

    Section 5.03  RETAINED AMOUNT.

    (a) The Litigation Trustees' obligation to make payments to the Holders
shall be subject to the requirement that the Litigation Trust retain the
Retained Amount for a period (the "Retained Amount Period") of one year (or such
longer period as the Litigation Trustees shall reasonably determine (initially
or at any time prior to the then scheduled termination of the Retained Amount
Period) may be reasonably likely to be required) to satisfy all expenses, costs
and claims and indemnification obligations of the Litigation Trust which may be
incurred or which may arise after the Proceeds Amount is paid in full. The
"Retained Amount" shall mean $1.0 million (or such greater amount as the
Litigation Trustees shall reasonably determine may be reasonably likely to be
required to pay additional expenses or to satisfy the Litigation Trust's
indemnification obligations). Any portion of the Retained Amount in excess of
$1.0 million or retained longer than one year shall promptly be distributed to
the Holders after the Litigation Trustees reasonably determine that such funds
are no longer needed for such purposes.

    (b) The Litigation Trust shall invest the Retained Amount in a Permitted
Investment, to the extent that portions of the Retained Amount are not required
to be disbursed for expenses of the Litigation Trust, until the expiration of
the Retained Amount Period.

                                      A-22
<PAGE>
                                  ARTICLE VI.
                          MANAGEMENT OF THE LITIGATION

    Section 6.01  AUTHORITY OF THE LITIGATION TRUSTEES.

    (a) The Sponsor hereby agrees to, and agrees to cause Bank United and its
successors to, upon the effectiveness of the Commitment and as requested by the
Litigation Trustees thereafter, to follow and comply with all instructions of
the Litigation Trustees in connection with all aspects of the prosecution of the
Litigation, including, at the expense of the Litigation Trust, the retention of
attorneys, experts, consultants and others and the making of all decisions and
the taking of all actions necessary or appropriate to prosecute or otherwise
pursue the Litigation by litigation in trial or appellate courts, arbitration,
alternative dispute resolution, negotiation, settlement or compromise, or the
dismissal, settlement or cessation of prosecution of the Litigation, withdrawal
or abandonment of the Litigation; PROVIDED, that no settlement agreement or
other agreement entered into at the direction of the Litigation Trustees as part
of the resolution of the Litigation or a related Internal Revenue Service ruling
issued to a member of the Bank United Group in connection with such agreement
may impose any liability or obligation whatsoever (other than a standard
settlement release relating only to the Litigation or other related claims that
the Sponsor or Bank United's stockholders may have been able to bring as of
immediately prior to the Merger) on any member or members of the Bank United
Group or adversely affect or restrict the conduct of its business or adversely
affect its tax posture with respect to other matters. The Sponsor hereby agrees
not to, and to cause Bank United (or any successor thereto) not to, take any
action with respect to the Litigation except in accordance with the instructions
of the Litigation Trustees.

    (b) Prior to the Effective Time, the Sponsor shall certify by an Officers'
Certificate that it has taken the necessary corporate action evidenced by
resolutions substantially in the form set forth in EXHIBIT C hereto, to follow
and comply, and to cause to cause Bank United and its successors to follow and
comply, with all instructions of the Litigation Trustees as required by
Section 6.1(a). Prior to the Effective Time, Bank United shall certify by an
Officer's Certificate that it has taken the necessary action evidenced by
resolutions to follow and comply with instructions of the Litigation Trustees.

    (c) Nothing in this Declaration shall constitute a grant by the Sponsor,
Bank United or their successors of a power of attorney to the Litigation
Trustees to appear on behalf of the Sponsor, Bank United or their successors in
connection with the Litigation.

    (d) Nothing in this Declaration shall be deemed to require the Sponsor to
advance or risk any funds or otherwise incur any financial liability in
connection with the Litigation or the Litigation Trust other than as provided by
the Commitment or as contemplated by paragraph (a) above.

    (e) Each of the Sponsor and Bank United shall abide by the Recovery
Agreement dated July 24, 1996, by and among the Sponsor, Bank United and
Hyperion (as it may be hereafter amended from time to time, the "Recovery
Agreement"). Each of the Litigation Trustees acknowledges the obligations of the
Sponsor and Bank United under the Recovery Agreement.

    Section 6.02  RETENTION OF ATTORNEYS, ACCOUNTANTS AND OTHER PROFESSIONALS.

    (a) The Litigation Trustees shall retain, at the expense of the Litigation
Trust, such attorneys as counsel to the Litigation Trust (including, without
limitation, counsel to the Sponsor, Bank United or any successor to such Persons
in connection with the Litigation) as the Litigation Trustees in their sole
discretion may select, and the Litigation Trustees may dismiss such attorneys in
their sole discretion. The Litigation Trustees shall instruct the Sponsor and
Bank United (or any successor to such Persons), at the expense of the Litigation
Trust, to retain such attorneys as the Litigation Trustees may select to aid in
the prosecution of the Litigation and to perform such other functions as may be
appropriate in the Litigation Trustees' sole and absolute discretion, and the
Sponsor shall, and shall cause Bank United (or any successor thereto), in each
case at the expense of the Litigation Trust, to follow and

                                      A-23
<PAGE>
comply with such instructions in the manner set forth in Section 6.01(a). The
Litigation Trustees may commit the Litigation Trust to and shall pay such
attorneys compensation from the funds of the Litigation Trust for services
rendered and expenses incurred and may enter into arrangements on such terms as
may be approved by the Litigation Trustees with such counsel, including terms
providing that all or a portion of such counsel's compensation may be contingent
and may be based on a percentage of any recovery, subject to
Section 2.03(c)(ii), PROVIDED, HOWEVER, that no such arrangement shall provide
for recourse against Bank United or its successors. The Litigation Trustees
shall have full authority to instruct the Sponsor or Bank United (or any
successor to such Persons) to dismiss any such attorneys retained by the Sponsor
or Bank United (or any successor to such Persons) and the Sponsor shall, and
shall cause Bank United (or any successor thereto), to comply with such
instructions.

    Unless and until instructed to the contrary by the Litigation Trustees, the
attorneys currently retained to aid in the prosecution of the Litigation shall
continue in such role for the Sponsor and Bank United (or any successor to such
Persons), and all parties hereto, having been fully advised, waive any conflict
of interest, if any, which the attorneys currently retained may have with
respect to any party to this Declaration. In addition, any attorneys, experts,
advisors, consultants and investigators retained by or at the direction of the
Litigation Trustees and any experts, advisors, consultants and investigators
retained by attorneys to aid in the prosecution of the Litigation shall be
authorized by this Declaration to accept directions from the Litigation Trustees
with respect to the Litigation, notwithstanding any conflict of interest that
may arise by reason of such directions with the interests of any party to this
Declaration. The Litigation Trustees shall have no duty to the Sponsor or Bank
United (or any affiliate, successor entity, or affiliate of any successor
entity) to consider any interest the Sponsor, Bank United or any such entity may
have with respect to the Litigation. All oral and written communications between
any attorneys retained by or at the direction of the Litigation Trustees on one
hand, and the Sponsor, Bank United, the Litigation Trust, any Trustee, their
affiliates, or any successor entity or any affiliate of any successor entity, on
the other hand, relating to the Litigation and/or to the actions of the
Litigation Trustees, will be protected by the attorney-client privilege and/or
the attorney work product doctrine, and no such communication will result in the
waiver of any applicable claim of confidentiality or privilege.

    (b) The Litigation Trustees may retain an independent public accounting firm
to audit the financial books and records of the Litigation Trust and to perform
such other reviews and/or audits as may be appropriate in the Litigation
Trustees' sole and absolute discretion. The Litigation Trustees may commit the
Litigation Trust, and shall cause the Litigation Trust, to pay such accounting
firm compensation from the funds of the Litigation Trust for services rendered
and expenses incurred. The Litigation Trustees shall have full authority to
dismiss such accounting firm.

    (c) The Litigation Trustees may retain on behalf of the Litigation Trust or
instruct the Sponsor or Bank United (or any successor to such Persons) to retain
such other experts, advisors, consultants, investigators or other support staff,
assistants or employees as the Litigation Trustees, in their sole and absolute
discretion, may deem necessary or appropriate to assist the Litigation Trustees
to carry out their powers and duties under this Declaration. The Litigation
Trustees may commit the Litigation Trust to and shall cause the Litigation Trust
to pay all such persons or entities compensation from the funds of the
Litigation Trust for services rendered and expenses incurred. The Litigation
Trustees shall have full authority to dismiss such persons retained by the
Litigation Trust or to instruct the Sponsor or Bank United (or any successor to
such Persons) to dismiss such persons retained by the Sponsor or Bank United (or
any successor to such Persons).

    Section 6.03  COOPERATION BY THE SPONSOR.

    (a) The Sponsor shall provide, and shall cause Bank United to provide the
Litigation Trustees with such access to the books, records, offices, other
facilities, employees, agents, representatives and independent accountants of
the Sponsor and Bank United as the Litigation Trustees shall reasonably require
for the purpose of performing their duties and exercising their powers under
this Declaration.

                                      A-24
<PAGE>
The Litigation Trustees shall have full authority on behalf of the Sponsor and
Bank United to consult with and instruct the attorneys for the Sponsor and Bank
United and their successors in connection with the Litigation.

    (b) The Sponsor shall use its best efforts to cause the relevant officers of
the Sponsor and its successors and the agents and representatives of the Sponsor
and its successors, and to cause the relevant officers of Bank United and its
successors and the agents and representatives of Bank United and its successors,
to be available to provide testimony and to execute documents, in each case as
required, in the reasonable judgment of the Litigation Trustees, for the purpose
of prosecuting the Litigation, including execution of any complaints, motions,
answers and other pleadings, affidavits, requests and notices.

                                  ARTICLE VII.
                 ISSUANCE AND DISTRIBUTION OF CPR CERTIFICATES

    Section 7.01  GENERAL PROVISIONS REGARDING CPR CERTIFICATES.

    (a) The Litigation Trust shall be authorized to issue one class of undivided
beneficial interests in the assets of the Litigation Trust, which may be issued
in an unlimited number and shall be represented by CPR Certificates
substantially in the form of Exhibit D.

    (b) The CPR Certificates issued immediately prior to the Effective Time
shall be signed on behalf of the Litigation Trust by an Authorized Officer of
the Sponsor. Any CPR Certificates issued by the Litigation Trust following the
Merger shall be signed on behalf of the Litigation Trust by a majority of the
Litigation Trustees. Such signature shall be the facsimile or manual signature
of such Authorized Officer or Litigation Trustees, as applicable. In case any
Authorized Officer or Litigation Trustee, as applicable, who shall have signed
any of the CPR Certificates shall cease to be an Authorized Officer or
Litigation Trustee, as applicable, before the CPR Certificates so signed shall
be delivered by the Litigation Trust, such CPR Certificates nevertheless may be
delivered as though the person who signed such CPR Certificates had not ceased
to be an Authorized Officer or Litigation Trustee, as applicable; and any CPR
Ceritificate may be signed on behalf of the Litigation Trust by such persons
who, at the actual date of execution of such CPR Ceritificate, shall be an
Authorized Officer or Litigation Trustee, as applicable, of the Litigation
Trust, although at the date of the execution and delivery of the Declaration any
such person was not an Authorized Officer or Litigation Trustee, as applicable.
A CPR Ceritificate shall not be valid until authenticated by the manual
signature of a Responsible Officer of the Institutional Trustee. Such signature
shall be conclusive evidence that the CPR Ceritificate has been authenticated
under this Declaration. Upon written order of the Litigation Trust signed by one
Litigation Trustee, or upon the written order of an Authorized Officer of the
Sponsor with respect to CPR Certificates issued immediately prior to the
Effective Time, the Institutional Trustee shall authenticate the CPR
Certificates for original issue. The Institutional Trustee may appoint an
authenticating agent acceptable to the Litigation Trustees or the Sponsor, if
such appointment occurs prior to the Effective Date, to authenticate the CPR
Certificates.

    (c) Upon issuance of the CPR Certificates as provided in this Declaration,
the CPR Certificates so issued shall be deemed to be validly issued, fully paid
and non-assessable.

    (d) Every Person, by virtue of having become a Holder in accordance with the
terms of this Declaration, shall be deemed to have expressly assented and agreed
to the terms of, and shall be bound by, this Declaration.

    Section 7.02  PAYING AGENT, TRANSFER AGENT AND REGISTRAR.  The Litigation
Trust shall maintain in [            ], an office or agency where the CPR
Certificates may be presented for payment (the "Paying Agent"), and an office or
agency where CPR Certificates may be presented for registration of transfer (the
"Transfer Agent"). The Litigation Trust shall keep or cause to be kept at such
office or agency a register for the purpose of registering CPR Certificates and
transfers and exchanges of CPR

                                      A-25
<PAGE>
Certificates, such register to be held by a registrar (the "Registrar"). The
Litigation Trustees may appoint the Paying Agent, the Registrar, and the
Transfer Agent and may appoint one or more additional Paying Agents or one or
more co-Registrars, or one or more co-Transfer Agents in such other locations as
they shall determine. The term "Paying Agent" includes any additional paying
agent, the term "Registrar" includes any additional registrar or co-Registrar
and the term "Transfer Agent" includes any additional or co-Transfer Agent. The
Litigation Trustees may change any Paying Agent without prior notice to any
Holder. The Litigation Trustees shall notify the Institutional Trustee of the
name and address of any Paying Agent, Transfer Agent and Registrar not a party
to this Declaration. The Litigation Trustees hereby appoint the Institutional
Trustee to act as Paying Agent, Transfer Agent and Registrar for the CPR
Certificates. The Institutional Trustee or any of its Affiliates may act as
Paying Agent, Transfer Agent or Registrar.

    Section 7.03  FORM AND DATING.

    (a) The CPR Certificates and the Institutional Trustee's certificate of
authentication thereon shall be substantially in the form of Exhibit D, which is
hereby incorporated in and expressly made a part of this Declaration. CPR
Certificates may be typed, printed, lithographed or engraved or may be produced
in any other manner as is reasonably acceptable to the Sponsor prior to the
Effective Time, and the Litigation Trustees after the Effective Time, as
conclusively evidenced by the execution thereof. The CPR Certificates may have
letters, numbers, notations or other marks of identification or designation and
such legends or endorsements required by law, stock exchange rule, agreements to
which the Litigation Trust is subject, if any, or usage (provided that any such
notation, legend or endorsement is in a form acceptable to the Sponsor prior to
the Effective Time, and the Litigation Trustees after the Effective Time). The
Litigation Trustees shall furnish any such legend not contained in Exhibit D to
the Institutional Trustee in writing. Each CPR Ceritificate shall be dated the
date of its authentication. The form of CPR Ceritificate set forth in Exhibit D
is part of the terms of this Declaration and to the extent applicable, the
Institutional Trustee, the Delaware Trustee, the Litigation Trustees and the
Sponsor, by their execution and delivery of this Declaration, expressly agree to
such terms and provisions and to be bound thereby. The Litigation Trust, in
issuing the CPR Certificates may use "CUSIP" numbers (if then generally in use),
and, if so, the Institutional Trustee shall indicate the "CUSIP" numbers of the
CPR Certificates in notices of redemption and related materials as a convenience
to Holders; PROVIDED that any such notice may state that no representation is
made as to the correctness of such numbers either as printed on the CPR
Certificates or as contained in any notice of redemption and related materials.

    (b) Definitive and Global CPR Certificates. CPR Certificates shall be
issued, at the option of the Holder, in the form of individual certificates in
definitive, fully registered form without distribution coupons (each, a
"Definitive CPR Ceritificate"), or in the form of one or more permanent global
CPR Certificates in definitive, fully registered form without distribution
coupons with the appropriate global legends (each, a "Global CPR Ceritificate").
The number of CPR Certificates represented by the Global CPR Ceritificate may
from time to time be increased or decreased by adjustments made on the records
of the Registrar and the Depositary or its nominee as hereinafter provided.

    (c) Book-Entry Provisions. This Section 7.03(c) shall apply only to the
Global CPR Certificates. If CPR Certificates are issued as provided in
Section 7.03(b), the Litigation Trust shall execute and the Institutional
Trustee shall, in accordance with this Section 7.03, authenticate and deliver
initially one or more Global CPR Certificates that (a) shall be registered in
the name of Cede & Co. or other nominee of such Depositary and (b) shall be
delivered by the Institutional Trustee to such Depositary or pursuant to such
Depositary's instructions or held by the Institutional Trustee as custodian for
the Depositary. Clearing Agency Participants shall have no rights under this
Declaration with respect to any Global CPR Certificates held on their behalf by
the Depositary or by the Institutional Trustee as the custodian of the
Depositary or under such Global CPR Certificates, and the Depositary may be
treated by the Litigation Trust, the Institutional Trustee and any officer,
director, employee, or agent of the

                                      A-26
<PAGE>
Litigation Trust or the Institutional Trustee as the absolute owner of such
Global CPR Certificates for all purposes whatsoever. Notwithstanding the
foregoing, nothing herein shall prevent the Litigation Trust, the Institutional
Trustee or any agent of the Litigation Trust or the Institutional Trustee from
giving effect to any written certification, proxy or other authorization
furnished by the Depositary or impair, as between the Depositary and the
Clearing Agency Participants, the operation of customary practices of such
Depositary governing the exercise of the rights of a holder of a beneficial
interest in any Global CPR Certificates.

    (d) Definitive CPR Certificates. Any Person with a beneficial interest in a
Global CPR Ceritificate may exchange such interest for Definitive CPR
Certificates.

    Section 7.04  MUTILATED, DESTROYED, LOST OR STOLEN
CERTIFICATES.  If: (a) any mutilated CPR Certificates should be surrendered to
the Registrar, or if the Registrar shall receive evidence to its satisfaction of
the destruction, loss or theft of any CPR Ceritificate; and (b) there shall be
delivered to the Institutional Trustee, the Registrar and the Litigation
Trustees such security or indemnity as may be required by them to keep each of
them harmless; then, in the absence of notice that such CPR Ceritificate shall
have been acquired by a protected purchaser, a majority of the Litigation
Trustees on behalf of the Litigation Trust shall execute and the Institutional
Trustee shall authenticate and deliver, in exchange for or in lieu of any such
mutilated, destroyed, lost or stolen CPR Ceritificate, a new CPR Ceritificate of
like denomination. In connection with the issuance of any new CPR Ceritificate
under this Section 7.04, the Registrar or the Institutional Trustee may require
the payment of a sum sufficient to cover any tax or other governmental charge
that may be imposed in connection therewith. Any duplicate CPR Ceritificate
issued pursuant to this Section shall constitute conclusive evidence of an
ownership interest in the relevant CPR Certificates, as if originally issued,
whether or not the lost, stolen or destroyed CPR Ceritificate shall be found at
any time.

    Section 7.05  TEMPORARY CPR CERTIFICATES.  Until definitive CPR Certificates
are ready for delivery, the Litigation Trustees may prepare and the
Institutional Trustee shall authenticate temporary CPR Certificates. Temporary
CPR Certificates shall be substantially in the form of definitive CPR
Certificates but may have variations that the Litigation Trustees consider
appropriate for temporary CPR Certificates. Without unreasonable delay, the
Litigation Trustee shall prepare and the Institutional Trustee shall
authenticate definitive CPR Certificates in exchange for temporary CPR
Certificates, whereafter such temporary CPR Certificates shall be cancelled and
be of no further force or effect.

    Section 7.06  ISSUANCE OF CPR CERTIFICATES ON THE EFFECTIVE
DATE.  Immediately prior to the Effective Time, the Litigation Trust shall issue
to the Sponsor (i) one CPR Ceritificate for each share of the Sponsor's common
stock outstanding as of immediately prior to the Effective Time, (ii) such
number of CPR Certificates required to satisfy the Sponsor's obligations under
the Litigation Trustee Agreements, (iii) one CPR Ceritificate for each share of
stock of the Sponsor underlying the stock options of the Sponsor outstanding
immediately prior to the Merger, for delivery by the Sponsor to the holders of
Replacement Options upon exercise of Replacement Options following the Merger,
or upon surrender of all or a part of such Replacement Option for cash as
provided in the relevant stock plan of Sponsor and award letter of the holder of
such Replacement Option following the Merger, as the case may be, and (v) one
CPR Ceritificate for each share of the Sponsor's common stock with respect to
which the Sponsor stockholders have provided a notice of intent to exercise
appraisal rights in the Merger.

    Section 7.07  REDEMPTION AND CANCELLATION.

    (a) The Sponsor and the Litigation Trustees at any time may deliver CPR
Certificates to the Institutional Trustee for cancellation. The Registrar shall
forward to the Institutional Trustee any CPR Certificates surrendered to it for
registration of transfer, redemption or payment. The Institutional Trustee shall
promptly cancel all CPR Certificates surrendered for registration of transfer,
payment, replacement or cancellation and shall destroy such canceled CPR
Certificates in accordance with its customary practices and procedures. The
Institutional Trustee may not issue new CPR Certificates to replace CPR
Certificates that have been paid in full or that have been delivered to the
Institutional Trustee for cancellation.

                                      A-27
<PAGE>
    (b) The Litigation Trust shall mandatorily redeem for $0.01 in cash each CPR
Ceritificate issued to a stockholder of the Sponsor who provides a notice of
intent to exercise appraisal rights in the Merger with respect to shares of the
common stock of the Sponsor. If any such stockholder of the Sponsor subsequently
withdraws, or fails to perfect, such appraisal demand, Washington Mutual, in its
capacity as successor to the Sponsor, shall deliver to such stockholder one CPR
Ceritificate for each share of the common stock of the Sponsor as to which such
appraisal demand was withdrawn and not perfected.

    (c) Except as contemplated by Section 7.08 below, the Sponsor shall only
retain CPR Certificates in an amount equal to, and shall return to the
Litigation Trust for cancellation any CPR Certificates held by it in excess of,
(i) the number of shares of the Sponsor's stock as to which former stockholders
of the Sponsor exercised and perfected and did not withdraw their appraisal
rights plus (ii) the number of CPR Certificates required to satisfy the
Sponsor's obligations under the Litigation Trustee Agreements, plus (iii) the
number of shares of the stock of underlying Bank United SARs and Bank United
Performance Share Awards that are exercised for cash prior to the Merger or
which are surrendered solely for cash in the Merger, plus (iv) that number of
CPR Certificates as is equal to the number of shares of stock of the Sponsor
underlying the stock options of the Sponsor outstanding immediately prior to the
Merger, for delivery by the Sponsor to the holders of Replacement Options upon
exercise of Replacement Options following the Merger. If any Replacement Options
are canceled or expire unexercised, the Sponsor shall return the related number
of CPR Certificates to the Litigation Trust and the Institutional Trustee shall
cancel such CPR Certificates.

    Section 7.08  ISSUANCE OF CPR CERTIFICATES AFTER THE EFFECTIVE TIME.  The
Trust may issue additional CPR Certificates to the Sponsor in such amounts and
at such times as determined in accordance with the adjustment provisions of the
8% Corporate Premium Income Equity Securities of the Sponsor (or, after the
Effective Time, the 8% Corporate Premium Income Equity Securities of Washington
Mutual into which such securities of the Sponsor were converted pursuant to the
Merger Agreement). In addition, the Trust may issue additional CPR Certificates
in accordance with Section 2.03(c).

                                 ARTICLE VIII.
                DISSOLUTION AND TERMINATION OF LITIGATION TRUST

    Section 8.01  DISSOLUTION AND TERMINATION OF LITIGATION TRUST.

    (a) The Litigation Trust shall dissolve:

        (i) 30 days after the date on which the Institutional Trustee has
    distributed any portion of the Retained Amount remaining upon the expiration
    of the Retained Amount Period;

        (ii) if the Litigation Trustees determine in writing that the final
    Payment Amount is less than zero (whether because the Proceeds Amount is
    less than or equal to zero or because the expenses of the Litigation Trust
    exceed the Proceeds Amount) and there is no Retained Amount, thirty days
    after such determination by the Litigation Trustees;

        (iii) 30 days after the date of a final dismissal of the Litigation or a
    determination by the Sponsor or Bank United (or any successor to such
    Persons) not to continue to prosecute the Litigation, in either case upon
    the instruction of the Litigation Trustees; or

        (iv) if, prior to the Effective Time, the Sponsor so resolves in
    writing; provided that such dissolution is consummated before the issuance
    of any CPR Certificates.

    (b) As soon as is practicable after the occurrence of an event referred to
in Section 8.1(a), and after completion of winding up of the Litigation Trust
and satisfaction of liabilities of the Litigation Trust in accordance with the
Business Trust Act, the Trustees shall terminate the Litigation Trust by filing
a certificate of cancellation with the Secretary of State of the State of
Delaware.

    (c) The provisions of Sections 3.08, 3.13, 11.04 and 11.06 shall survive the
termination of the Litigation Trust.

                                      A-28
<PAGE>
                                  ARTICLE IX.
                             TRANSFER OF INTERESTS

    Section 9.01  GENERAL.

    (a) Where CPR Certificates are presented by or on behalf of a Holder to the
Registrar or a co-registrar with a request to register a transfer or to exchange
them for an equal number of CPR Certificates represented by different
certificates, the Registrar shall register the transfer or make the exchange if
its requirements for such transactions are met. To permit registrations of
transfer and exchanges, a majority of the Litigation Trustees shall execute and
the Institutional Trustee shall authenticate CPR Certificates at the Registrar's
request.

    (b) CPR Certificates may only be transferred by a Holder, in whole or in
part, in accordance with the terms and conditions set forth in this Declaration
and in the terms of the CPR Certificates. Any transfer or purported transfer of
any CPR Certificate not made in accordance with this Declaration shall be null
and void and will be deemed to be of no legal effect whatsoever and any such
transferee shall be deemed not to be the holder of such CPR Certificates for any
purpose, including but not limited to the receipt of the Payment Amount, and
such transferee shall be deemed to have no interest whatsoever in such CPR
Certificates.

    (c) The Registrar shall provide for the registration of CPR Certificates and
of transfers of CPR Certificates, which will be effected without charge but only
upon payment (with such indemnity as the Registrar may require) in respect of
any tax or other governmental charges that may be imposed in relation to it.
Upon surrender for registration of transfer of any CPR Certificates, the
Registrar shall cause one or more new CPR Certificates to be issued in the name
of the designated transferee or transferees. Every CPR Certificate surrendered
for registration of transfer shall be accompanied by a written instrument of
transfer in form satisfactory to the Registrar duly executed by the Holder or
such Holder's attorney duly authorized in writing. Each CPR Certificate
surrendered for registration of transfer shall be canceled by the Institutional
Trustee pursuant to Section 7.07. A transferee of a CPR Certificate shall be
entitled to the rights and subject to the obligations of a Holder hereunder upon
the receipt by such transferee of a CPR Certificate issued in the name of such
transferee and otherwise executed and authenticated as provided herein. By
acceptance of a CPR Certificate, each transferee shall be deemed to have agreed
to be bound by this Declaration.

    Section 9.02  TRANSFER PROCEDURES.

    (a) Transfer and Exchange of Definitive CPR Certificates. When Definitive
CPR Certificates are presented to the Registrar (x) to register the transfer of
such Definitive CPR Certificates, or (y) to exchange such Definitive CPR
Certificates for an equal number of Definitive CPR Certificates of another
number, the Registrar shall register the transfer or make the exchange as
requested if its reasonable requirements for such transaction are met; PROVIDED,
HOWEVER, that the Definitive CPR Certificates surrendered for registration of
transfer or exchange shall be duly endorsed or accompanied by a written
instrument of transfer in form reasonably satisfactory to the Litigation Trust
and the Registrar, duly executed by the Holder thereof or his attorney duly
authorized in writing.

    (b) Restrictions on Transfer of a Definitive CPR Certificate for a
Beneficial Interest in a Global CPR Certificate. A Definitive CPR Certificate
may not be exchanged for a beneficial interest in a Global CPR Certificate
except upon satisfaction of the requirements set forth below. Upon receipt by
the Institutional Trustee of a Definitive CPR Certificate, duly endorsed or
accompanied by appropriate instruments of transfer, together with written
instructions directing the Institutional Trustee to make, or to direct the
Depositary to make, an adjustment on its books and records with respect to a
Global CPR Certificate to reflect an increase in the number of the CPR
Certificates represented by the Global CPR Certificate, then the Institutional
Trustee shall cancel such Definitive CPR Certificate and cause, or direct the
Depositary to cause, the aggregate number of CPR Certificates represented by the
Global

                                      A-29
<PAGE>
CPR Certificate to be increased accordingly. If no Global CPR Certificates are
then outstanding, a majority of Litigation Trustees shall execute and the
Institutional Trustee or the Authenticating Agent shall authenticate, an
appropriate number of Global CPR Certificates.

    (c) Transfer and Exchange of Global CPR Certificates. The transfer and
exchange of Global CPR Certificates or beneficial interests therein shall be
effected through the Depositary, in accordance with this Declaration and the
procedures of the Depositary therefor. Notwithstanding any other provisions of
this Declaration, a Global CPR Certificate may not be transferred as a whole
except by the Depositary to a nominee of the Depositary or another nominee of
the Depositary or by the Depositary or any such nominee to a successor
Depositary or a nominee of such successor Depositary.

    (d) Transfer of a Beneficial Interest in a Global CPR Certificate for a
Definitive CPR Certificate.

        (i) Any Person having a beneficial interest in a Global CPR Certificate
    may upon request, and if accompanied by the information specified below,
    exchange such beneficial interest for a Definitive CPR Certificate,
    representing the same number of CPR Certificates. Upon receipt by the
    Institutional Trustee from the Depositary or its nominee on behalf of any
    Person having a beneficial interest in a Global CPR Certificate of written
    instructions or such other form of instructions as is customary for the
    Depositary or the Person designated by the Depositary as having such a
    beneficial interest in such Global CPR Certificate, then the Institutional
    Trustee shall cause, in accordance with the standing instructions and
    procedures of the Depositary, the aggregate liquidation amount of the Global
    CPR Certificate to be reduced on its books and records and, following such
    reduction, a majority of the Litigation Trustees shall execute and the
    Institutional Trustee or the Authenticating Agent shall authenticate, an
    appropriate number of Definitive CPR Certificates.

        (ii) Definitive CPR Certificate issued in exchange for a beneficial
    interest in a Global CPR Certificate pursuant to this Section 9.02(d) shall
    be registered in such names and in such authorized denominations as the
    Depositary, pursuant to instructions from Clearing Agency Participants or
    indirect participants or otherwise, shall instruct the Institutional
    Trustee. The Institutional Trustee shall deliver such CPR Certificates to
    the Persons in whose names such CPR Certificates are so registered in
    accordance with the instructions of the Depositary.

    (e) Definitive CPR Certificates If No Depositary.

    If at any time:

        (i) the Depositary notifies the Institutional Trustee and the Litigation
    Trustees that the Depositary is unwilling or unable to continue as
    Depositary for the Global CPR Certificates and a successor Depositary for
    the Global CPR Certificates is not appointed by the Litigation Trust at the
    direction of the Litigation Trustees within 90 days after delivery of such
    notice; or

        (ii) the Litigation Trustees notify the Institutional Trustee in writing
    to issue Definitive CPR Certificates under this Declaration, then a majority
    of the Litigation Trustee shall execute, and the Institutional Trustee or
    Authenticating Agent, upon receipt of a written order of the Litigation
    Trust signed by a Litigation Trustee requesting the authentication and
    delivery of Definitive CPR Certificates to the Persons designated by the
    Litigation Trustees, shall authenticate and deliver Definitive CPR
    Certificates, in an aggregate amount equal to the amount of Global CPR
    Certificates, in exchange for such Global CPR Certificates.

    (f) Cancellation or Adjustment of a Global CPR Certificate. At such time as
all beneficial interests in a Global CPR Certificate have either been exchanged
for Definitive CPR Certificates to the extent permitted by this Declaration or
redeemed, repurchased or canceled in accordance with the terms of this
Declaration, such Global CPR Certificate shall be returned to the Depositary for
cancellation or retained and canceled by the Institutional Trustee. At any time
prior to such cancellation, if any

                                      A-30
<PAGE>
beneficial interest in a Global CPR Certificate is exchanged for Definitive CPR
Certificates, CPR Certificates represented by such Global CPR Certificate shall
be reduced and an adjustment shall be made on the books and records of the
Institutional Trustee (if it is then the custodian for such Global CPR
Certificate) with respect to such Global CPR Certificate, by the Institutional
Trustee to reflect such reduction.

    (g) Obligations with Respect to Transfers and Exchanges of CPR Certificate.

        (i) To permit registrations of transfers and exchanges, a majority of
    the Litigation Trustees shall execute and the Institutional Trustee or
    Authenticating Agent shall authenticate Definitive CPR Certificates and
    Global CPR Certificates at the Registrar's or Depository's request, as
    applicable.

        (ii) Registrations of transfers or exchanges will be effected without
    charge, but only upon payment (with such indemnity as the Institutional
    Trustee or the Registrar may require) in respect of any tax or other
    governmental charge that may be imposed in relation to it.

        (iii) All CPR Certificates issued upon any registration of transfer or
    exchange pursuant to the terms of this Declaration shall evidence the same
    security and shall be entitled to the same benefits under this Declaration
    as the CPR Certificates surrendered upon such registration of transfer or
    exchange.

    Section 9.03  DEEMED CPR CERTIFICATE HOLDERS.  The Litigation Trust, the
Litigation Trustees, the Trustees, the Paying Agent, the Transfer Agent or the
Registrar may treat the Person in whose name any CPR Certificate shall be
registered on the books and records of the Litigation Trust as the sole holder
of such CPR Certificate (and of the undivided beneficial interest in the assets
of the Litigation Trust represented by such CPR Certificate) for purposes of
receiving payment of the Payment Amount and for all other purposes whatsoever
and, accordingly, shall not be bound to recognize any equitable or other claim
to or interest in such CPR Certificate or in the rights represented by such
Certificate on the part of any other Person, whether or not the Litigation
Trust, the Litigation Trustees, the Trustees, the Paying Agent, the Transfer
Agent or the Registrar shall have actual or other notice thereof.

    With respect to Global CPR Certificates issued by the Litigation Trust:
(i) the Trustees may deal with the Depositary as the authorized representative
of the Holders; (ii) the rights of the holders of beneficial interests in the
Litigation Trust shall be exercised only through the Depositary and shall be
limited to those established by law and agreement between such holders of
beneficial interests and the Depositary and/or direct participants of the
Depositary; (iii) the Depositary will make book-entry transfers among the direct
participants of the Depositary and will receive and transmit distributions on
the CPR Certificates to such direct participants; and (iv) the direct
participants of the Depositary shall have no rights under this Declaration under
or with respect to any of the CPR Certificates held on their behalf by the
Depositary, and the Depositary may be treated by the Trustees and their
respective agents, employees, officers and directors as the absolute owner of
the CPR Certificates for all purposes whatsoever.

    Section 9.04  NOTICES TO CLEARING AGENCY.  Whenever a notice or other
communication to the Holders is required under this Declaration, unless and
until Definitive CPR Certificates shall have been issued to the beneficial
owners of CPR Certificates pursuant to Section 9.02(d) or Section 9.02(e), the
Trustees shall give all such notices and communications specified herein to be
given to the Holders to the Clearing Agency, and shall have no notice
obligations to the beneficial owners of CPR Certificates.

    Section 9.05  APPOINTMENT OF SUCCESSOR CLEARING AGENCY.  If any Clearing
Agency elects to discontinue its services as securities depositary with respect
to the CPR Certificates, the Litigation Trustees, in their sole discretion,
shall appoint a successor Clearing Agency with respect to such CPR Certificates.

                                      A-31
<PAGE>
                                   ARTICLE X.
                          HOLDERS OF CPR CERTIFICATES

    Section 10.01  LIMITATIONS ON RIGHTS OF HOLDERS.  The Holders of the CPR
Certificates acknowledge that:

    (a) the Holders, in their capacities as Holders, are not stockholders of the
Sponsor, Bank United or any successor of either of them and will have no rights
to dividends, liquidation preferences or other distributions other than the
payments described in Article IV, and will have no voting rights except as
expressly described herein. The Commitment is solely a contractual obligation
among the Sponsor, the Litigation Trust and the Payment Trust, and the Holders
have no rights under the Commitment with respect to the Sponsor by reason of
their ownership of CPR Certificates and the Sponsor has no liability under the
Commitment to the Holders;

    (b) the CPR Certificates are not savings accounts or deposits and are not
insured by the Federal Deposit Insurance Corporation;

    (c) the Holders have no rights with respect to, or interest in, (i) the
Litigation, (ii) the Sponsor (or any successor thereto), (iii) Bank United (or
any successor thereto), or (iv) any amount received by the Sponsor or Bank
United or any other member of the Bank United Group with respect to the
Litigation, including any judgment or settlement proceeds;

    (d) nothing in this Declaration shall be construed to create any partnership
or joint venture between the Sponsor, Bank United, Washington Mutual or any
member of the Bank United Group, and the Holders;

    (e) (i) the Litigation is solely an asset of the Sponsor, Bank United,
Hyperion and their successors, (ii) the Litigation shall be conducted by and on
behalf of the Sponsor, Bank United and their successors solely in accordance
with the instructions of the Litigation Trustees pursuant to this Declaration,
(iii) the Litigation Trustees shall have the sole and exclusive right to direct
the Sponsor, Bank United and their successors to take (or not take) actions
relating to the Litigation as contemplated by this Declaration and the Recovery
Agreement and may, among other things, instruct the Sponsor, Bank United and
their successors to dismiss, settle or cease prosecuting the Litigation at any
time without obtaining any cash or other recovery, or upon obtaining any such
cash or other recovery as the Litigation Trustees may determine, (iv) the
Litigation Trustees have the sole and exclusive right to take or not take other
actions contemplated by this Declaration on behalf of the Sponsor, Bank United
and their successors relating to the Litigation (including, without limitation,
any decision with respect to the incurrence of expenses);

    (f) the liability of the Trustees and members of the Bank United Group is
limited to the extent set forth in Article XI.

    Section 10.02  LIMITATIONS ON SUITS BY HOLDERS.

    (a) To the fullest extent permitted by law, no Holder of CPR Certificates
shall have any right by virtue or by availing itself of any provision of this
Declaration to institute any action or proceeding other than a suit by such
Holder for nonpayment of amounts due and owing with respect to such Holder's CPR
Certificates following a payment of the Proceeds Amount to the Litigation Trust
and payment of the Payment Amount by the Litigation Trust to other Holders, at
law or in equity or in bankruptcy or otherwise upon or under or with respect to
this Declaration, or for the appointment of a Trustee, receiver, liquidator,
custodian or other similar official or for any other remedy hereunder, unless
such Holder previously shall have given to the Institutional Trustee written
notice of default and of the continuance thereof as herein before provided, and
unless also the Holders of not less than 50% of the CPR Certificates outstanding
shall have made written request upon the Institutional Trustee to institute such
action or proceeding in its own name as Trustee hereunder and shall have offered
to the

                                      A-32
<PAGE>
Institutional Trustee such reasonable indemnity as it may require against the
costs, expenses and liabilities to be incurred therein or thereby and the
Institutional Trustee for 60 days after its receipt of such notice, request and
offer of indemnity shall have failed to institute any such action or proceeding;
it being understood and intended, and being expressly covenanted by the Holder
of every CPR Certificate with every other Holder of CPR Certificates and the
Institutional Trustee, that no one or more Holders shall have any right in any
manner whatever by virtue or by availing itself or themselves of any provision
of this Declaration to effect, disturb or prejudice the rights of any other such
Holder, or to obtain or seek to obtain priority over or preference to any other
such Holder or to enforce any right under this Declaration, except in the manner
herein provided and for the equal, ratable and common benefit of all Holders.
For the protection and enforcement of the provisions of this Section, each and
every Holder and the Institutional Trustee shall be entitled to such relief as
can be given either at law or in equity.

    (b) Any proceeding by Holders shall be instituted only in accordance with
the following procedures:

        (i) The prospective plaintiff(s) shall deliver to the Institutional
    Trustee (which shall promptly deliver a copy thereof to the Litigation
    Trustees) a printed or typewritten statement not more than 10 pages in
    length containing (i) the name(s) and address(es) of the prospective
    plaintiff(s), (ii) a statement of the nature and amount of each plaintiff's
    interest in the CPR Certificates, and (iii) a description of the nature and
    grounds of the claims to be asserted and the relief or remedy sought.

        (ii) The Institutional Trustee shall promptly notify the prospective
    plaintiff(s) of the number of copies needed for distribution to Holders and
    the postage, printing and administrative costs for preparing and mailing the
    statement of the prospective plaintiff(s), a response by the Institutional
    Trustee or the Litigation Trustees, as applicable, which shall not exceed 10
    pages in length, a consent form described below and a return envelope. Upon
    receipt of a certified check for such postage, printing and administrative
    costs, the Institutional Trustee shall promptly mail these materials to the
    Holders. Sixty days after mailing, the responses received shall be open to
    inspection by the prospective plaintiff(s) or any Holder at reasonable times
    during business hours at the office of the Litigation Trust designated for
    such purposes.

        (iii) The mailing to Holders shall include a consent form reading
    substantially as follows:

    "In response to the Bank United Litigation Contingent Payment Rights
Litigation Trust mailing dated             ,

    ______ I HEREBY CONSENT TO SUCH SUIT.

    ______ I DO NOT CONSENT TO SUCH SUIT.

    Signature

------------------------------------

    Printed or Typed Name of Holder

    Date:

------------------------------------

    "If this response is not returned by____________, you will be considered as
not consenting to such suit."

                                      A-33
<PAGE>
                                  ARTICLE XI.
               LIMITATION OF LIABILITY OF HOLDERS OF SECURITIES,
                               TRUSTEES OR OTHERS

    Section 11.01  LIABILITY.

    (a) Except as expressly set forth in this Declaration, the Trustees shall
not be:

        (i) personally liable for the payment of any amounts, including, without
    limitation, the Payment Amount or any portion of the Retained Amount
    remaining upon the expiration of the Retained Amount Period, to the Holders,
    which payment shall be made solely from the Proceeds Amount, if any, and the
    Retained Amount, if any, respectively, and other assets of the Litigation
    Trust, if any; or

        (ii) required to pay to the Litigation Trust or to any Holder any
    deficit upon dissolution of the Litigation Trust or otherwise.

    (b) Pursuant to Section 3803(a) of the Business Trust Act, the Holders of
the CPR Certificates shall be entitled to the same limitation of personal
liability extended to stockholders of private corporations for profit organized
under the General Corporation Law of the State of Delaware.

    Section 11.02  EXCULPATION.

    (a) To the fullest extent permitted by law, no Indemnified Person shall be
liable, responsible or accountable in damages or otherwise to the Litigation
Trust or any Indemnified Person for any loss, damage or claim incurred by reason
of any act or omission performed or omitted by such Indemnified Person, except
that (i) the Litigation Trustees shall be liable for any such loss, damage or
claim incurred by reason of any act or omission performed or omitted by them if
it shall be established in a final and nonappealable judicial determination by
clear and convincing evidence that any such act or omission of the Litigation
Trustees was undertaken with deliberate intent to injure the Holders or with
reckless disregard for the best interests of such Holders and, in any event, any
liability will be limited to actual, proximate, quantifiable damages, and
(ii) the Institutional Trustee or the Delaware Trustee shall be liable for any
such loss, damage or claim incurred by reason of the Institutional Trustee's or
Delaware Trustee's (as the case may be) gross negligence or willful misconduct
with respect to such acts or omissions and, in any event, any liability will be
limited to actual, proximate, quantifiable damages; PROVIDED, that nothing in
this Section 11.2(a) is intended to limit the Litigation Trustees' right to
insurance obtained by the Litigation Trust and the proceeds of such insurance.

    (b) To the fullest extent permitted by law, no Indemnified Person shall have
any liability to the Litigation Trust, the Trustees or the Holders. Without
limiting the generality of the foregoing, to the fullest extent permitted by
law, none of the Holders (in their capacity as Holders), the Trustees or the
Litigation Trust shall have the right to enforce, institute or maintain a suit,
action or proceeding against a Indemnified Person relating to the formation of
the Litigation Trust, the entering into of the Commitment, the distribution of
the CPR Certificates, the maintenance of the Litigation at the direction of,or
the actions of the Litigation Trustees in their capacity (or purportedly in
their capacity) as, Litigation Trustees. Notwithstanding the preceding two
sentences of this Section 11.02(b), the Litigation Trust (or the Litigation
Trustees on behalf of the Litigation Trust) may enforce, institute or maintain a
suit, action or proceeding against (i), except as set forth in
Section 3.12(a)(ii), the Sponsor for breach of its obligations hereunder,
(ii) the Sponsor for breach of any of its obligations under the Commitment[or
the Payment Trust Agreement] or its failure to deliver any CPR Certificate when
due or to return to the Litigation Trust for cancellation any CPR Ceritificate
required to be returned pursuant to the Merger Agreement when so required,
(iii) the Sponsor for failure to make payments to the Litigation Trust under the
Commitment Agreement, (iv) Bank United for breach of any depository relationship
obligations it may have with respect to payments made by the Sponsor to the
Litigation

                                      A-34
<PAGE>
Trust., and in each case, the Sponsor and Bank United or their successors, as
the case may be, may be liable to the Litigation Trust in connection with such
suit, action or proceeding, or (v) Bank United for breach of its obligations
under the Commitment[or the Payment Trust Agreement]. Notwithstanding the
preceding two sentences, fees and expenses incurred by the Bank United Group in
such a suit, action or proceeding described in the preceding two sentences shall
not be set off against the Litigation Proceeds (in order to calculate the
Commitment Amount) if the Litigation Trust or the Litigation Trustees prevail in
such a suit, and, if in connection with suits brought pursuant to clauses
(i) through (iv) inclusive, shall be deemed expenses of the Litigation Trust
payable by the Litigation Trust out of the Commitment Amount, including any
Retained Amount, if the Litigation Trustees do not prevail.

    (c) An Indemnified Person shall be fully protected in relying in good faith
upon the records of the Litigation Trust and upon such information, opinions,
reports or statements presented to the Litigation Trust by any Person as to
matters the Indemnified Person reasonably believes are within such other
Person's professional or expert competence and, if selected by such Indemnified
Person, has been selected by such Indemnified Person with reasonable care by or
on behalf of the Litigation Trust, including information, opinions, reports or
statements as to the value and amount of the assets, liabilities, profits,
losses, or any other facts pertinent to the existence and amount of assets from
which payment to Holders might properly be paid.

    Section 11.03  FIDUCIARY DUTY.

    (a) To the extent that, at law or in equity, an Indemnified Person has
duties (including fiduciary duties) and liabilities relating thereto to the
Litigation Trust or to any other Indemnified Person, an Indemnified Person
acting under this Declaration shall not be liable to the Litigation Trust or to
any other Indemnified Person for its good faith reliance on the provisions of
this Declaration. The provisions of this Declaration, to the extent that they
restrict the duties and liabilities of an Indemnified Person otherwise existing
at law or in equity, are agreed by the parties hereto to replace such other
duties and liabilities of the Indemnified Person.

    (b) Whenever in this Declaration an Indemnified Person is permitted or
required to make a decision:

        (i) in its "discretion" or under a grant of similar authority, the
    Indemnified Person shall be entitled to consider such interests and factors
    as it desires, including its own interests, and shall have no duty or
    obligation to give any consideration to any interest of or factors affecting
    the Litigation Trust or any other Person; or

        (ii) in its "good faith" or under another express standard, the
    Indemnified Person shall act under such express standard and shall not be
    subject to any other or different standard imposed by this Declaration or by
    applicable law.

    Section 11.04  INDEMNIFICATION.

    (a) The Litigation Trust shall indemnify, to the fullest extent permitted by
law, any Indemnified Person in connection with any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative, arising out of or relating to the Litigation Trust, the CPR
Certificates, the distribution of the CPR Certificates, the Litigation or any
acts or omissions of the Trustees in their capacity or purportedly in their
capacity as Trustees, or actions taken by the Litigation Trustees (including
actions taken by the Litigation Trustees in their capacity as officers,
directors or agents of the Sponsor or Washington Mutual so long as such actions
relate to the Litigation Trust including, without limitation, the negotiation of
the terms of the Litigation Trust and the CPR Certificates and the approval of
the establishment of the Litigation Trust and the distribution of the CPR
Certificates and related transactions, but otherwise excluding actions taken by
the Litigation Trustees in such capacities), against any and all losses,
liabilities, damages, judgments, demands, suits, claims, assessments, charges,
fines, penalties and other costs and expenses, including attorneys' fees and

                                      A-35
<PAGE>
expenses and other fees and expenses associated with the defense of a claim or
incurred by such Indemnified Person in obtaining indemnification under this
Declaration, whether or not in a formal proceeding (collectively, "Damages").

    (b) Notwithstanding Section 11.04(a), no indemnification shall apply (i) in
the case of the indemnification of the Litigation Trustees, if Holders establish
in a final and nonappealable judicial determination by clear and convincing
evidence that such Damages arose as the result of acts or omissions of the
Litigation Trustees with deliberate intent to injure the CPR Ceritificate
Holders or with reckless disregard for the best interests of such Holders, or
(ii) in the case of the indemnification of the Delaware Trustee or the
Institutional Trustee, if Holders establish in a final and nonappealable
judicial determination by clear and convincing evidence that such damages arose
because such Trustee was grossly negligent or engaged in willful misconduct. The
termination of any action, suit or proceeding by judgment, order, settlement,
conviction, or upon a plea of NOLO CONTENDERE or its equivalent, shall not, of
itself, create a presumption that (i) the Litigation Trustees acted or decided
with deliberate intent to injure the Holders or with reckless disregard for the
best interests of such Holders or (ii) the Delaware Trustee or Institutional
Trustee was grossly negligent or engaged in willful misconduct.

    (c) To the fullest extent permitted by law, expenses (including attorneys'
fees and expenses) incurred by an Indemnified Person in defending a civil,
criminal, administrative or investigative action, suit or proceeding referred to
in Sections 11.04(a) shall be paid by the Litigation Trust in advance of the
final disposition of such action, suit or proceeding upon receipt of an
undertaking (without bond or security) by or on behalf of such Indemnified
Person to repay such amount if it shall ultimately be determined that he is not
entitled to be indemnified by the Litigation Trust as authorized in this
Section 11.04.

    (d) All rights to indemnification under this Section 11.04 shall be deemed
to be provided by a contract between the Litigation Trust and each Indemnified
Person who serves in such capacity at any time while this Section 11.04 is in
effect. Any repeal or modification of this Section 11.04 shall not affect any
rights or obligations then existing.

    (e) The Litigation Trust shall purchase and maintain insurance to cover its
indemnification obligations and any other liabilities of the Litigation
Trustees.

    (f) For purposes of this Section 11.04, references to "the Litigation Trust"
shall include, in addition to the resulting or surviving entity, any constituent
entity (including any constituent of a constituent) absorbed in a consolidation
or merger involving the Litigation Trust, so that any Person who is or was a
director, Trustee, officer or employee of such constituent entity, or is or was
serving at the request of such constituent entity as a director, Trustee,
officer, employee or agent of another entity, shall stand in the same position
under the provisions of this Section 11.04 with respect to the resulting or
surviving entity as he would have with respect to such constituent entity if its
separate existence had continued.

    (g) The indemnification and advancement of expenses provided by, or granted
pursuant to, this Section 11.04 shall continue as to a Person who has ceased to
be an Indemnified Person and shall inure to the benefit of the heirs, executors
and administrators of such a Person.

    Section 11.05  OUTSIDE BUSINESSES.  Any Indemnified Person or member of the
Bank United Group may engage in or possess an interest in other business
ventures of any nature or description, independently or with others, similar or
dissimilar to the business of the Litigation Trust, and the Litigation Trust and
the Holders shall have no rights by virtue of this Declaration in and to such
independent ventures or the income or profits derived therefrom, and the pursuit
of any such venture, even if competitive with the business of the Litigation
Trust, shall not be deemed wrongful or improper. No Indemnified Person or member
of the Bank United Group shall be obligated to present any

                                      A-36
<PAGE>
particular investment or other opportunity to the Litigation Trust even if such
opportunity is of a character that, if presented to the Litigation Trust, could
be taken by the Litigation Trust, and any Indemnified Person or member of the
Bank United Group shall have the right to take for its own account (individually
or as a partner or fiduciary) or to recommend to others any such particular
investment or other opportunity. Any Indemnified Person or member of the Bank
United Group may engage or be interested in any financial or other transaction
with the Sponsor or any Affiliate of the Sponsor, or may act as depositary for,
Trustee or agent for, or act on any committee or body of holders of, securities
or other obligations of the Sponsor or its Affiliates.

    Section 11.06  COMPENSATION; FEE.  The Litigation Trust agrees:

    (a) to pay to the Institutional Trustee and the Delaware Trustee from time
to time, upon the approval of the Litigation Trustees, reasonable compensation
for all services rendered by them hereunder (which compensation shall not be
limited by any provision of law in regard to the compensation of a Trustee of an
express Litigation Trust); and

    (b) except as otherwise expressly provided herein, to reimburse the Trustees
upon request for all expenses, disbursements and advances incurred or made by
the Trustees in accordance with any provision of this Declaration (including the
compensation and the expenses and disbursements of their respective agents and
counsel).

    The provisions of Section 11.04 and this Section 11.06 shall survive the
dissolution of the Litigation Trust and the termination of this Declaration and
the removal or resignation of any Trustee.

                                  ARTICLE XII.
                                   ACCOUNTING

    Section 12.01  FISCAL YEAR.  The fiscal year ("Fiscal Year") of the
Litigation Trust shall be the calendar year, or such other year as is required
by the Code.

    Section 12.02  CERTAIN ACCOUNTING MATTERS.

    (a) At all times during the existence of the Litigation Trust, the
Litigation Trustees shall keep, or cause to be kept, full books of account,
records and supporting documents, which shall reflect in reasonable detail each
transaction of the Litigation Trust. The books of account shall be maintained on
the accrual method of accounting, in accordance with generally accepted
accounting principles, consistently applied. The books of account and the
records of the Litigation Trust shall be examined by and reported upon as of the
end of each Fiscal Year of the Litigation Trust by a firm of independent
certified public accountants selected by the Litigation Trustees.

    (b) The Litigation Trustees shall cause to be duly prepared and delivered to
each of the Holders any annual United States federal income tax information
statement required by the Code, containing such information with regard to the
CPR Certificates held by each Holder as is required by the Code and the
regulations promulgated thereunder. Notwithstanding any right under the Code to
deliver any such statement at a later date, the Litigation Trustees shall
endeavor to deliver all such statements within 30 days after the end of each
Fiscal Year of the Litigation Trust.

    (c) The Litigation Trustees shall cause to be duly prepared and filed an
annual United States federal income tax return on a Form 1041 or such other form
required by United States federal income tax law, and any other annual income
tax returns required to be filed by the Litigation Trustees on behalf of the
Litigation Trust with any state or local taxing authority.

    Section 12.03  BANKING.  The Litigation Trust may maintain one or more bank
accounts in the name and for the sole benefit of the Litigation Trust; PROVIDED,
HOWEVER, that all payments received by the Litigation Trust pursuant to the
Commitment shall be maintained separately from other funds as provided by
Section 3.12(b)(ii)(D).

                                      A-37
<PAGE>
    Section 12.04  WITHHOLDING.  The Institutional Trustee or any Paying Agent
shall comply with all withholding requirements under United States federal,
state and local law. The Institutional Trustee or any Paying Agent shall
request, and the Holders shall provide to the Institutional Trustee or any
Paying Agent, such forms or certificates as are necessary to establish an
exemption from withholding with respect to each Holder, and any representations
and forms as shall reasonably be requested by the Institutional Trustee or any
Paying Agent to assist it in determining the extent of, and in fulfilling, its
withholding obligations. The Litigation Trustees shall file required forms with
applicable jurisdictions and, unless an exemption from withholding is properly
established by a Holder, shall remit amounts withheld with respect to the Holder
to applicable jurisdictions. To the extent that the Institutional Trustee or any
Paying Agent is required to withhold and pay over any amounts to any authority
with respect to distributions or allocations to any Holder, the amount withheld
shall be deemed to be a distribution in the amount of the withholding to the
Holder. In the event of any claimed overwithholding, Holders shall be limited to
an action against the applicable jurisdiction. If the amount required to be
withheld was not withheld from actual distributions made, the Institutional
Trustee or any Paying Agent may reduce subsequent distributions by the amount of
such withholding.

                                 ARTICLE XIII.
                            AMENDMENTS AND MEETINGS

    Section 13.01  AMENDMENTS.

    (a) Except as otherwise provided in this Declaration, this Declaration may
only be amended by a written instrument approved and executed by

        (i) the Institutional Trustee;

        (ii) the Litigation Trustees in accordance with the last sentence of
    Section 3.11(a); and

        (iii) if the amendment affects the rights, powers, duties, obligations
    or immunities of the Delaware Trustee, the Delaware Trustee.

    (b) Notwithstanding any other provision of this Article XIII, no amendment
shall be made, and any such purported amendment shall be void and ineffective
unless the Institutional Trustee shall have first received:

        (A) an Officers' Certificate from the Litigation Trust that such
    amendment is permitted by, and conforms to, the terms of this Declaration
    (including the terms of the CPR Certificates); and

        (B) an opinion of counsel (who may be counsel to the Litigation Trust or
    the Litigation Trustees) that such amendment is permitted by, and conforms
    to, the terms of this Declaration (including the terms of the CPR
    Certificates).

        (C) Except as provided in this Section 13.01, no amendment shall be
    made, and any such purported amendment shall be void and ineffective unless
    the Holders of a majority of the CPR Certificates then outstanding shall
    have consented to such amendment.

        (D) In addition to and notwithstanding any other provision in this
    Declaration, without the consent of each affected Holder, this Declaration
    may not, except as permitted by this Section 13.01, be amended to
    (i) discriminate among Holders, (ii) restrict the right of a Holder to
    institute suit for the enforcement of any such payment on or after such
    occurrence, or (iii) modify the definition of Payment Amount or Retained
    Amount.

        (E) Section 2.03(a) and this Section 13.01 shall not be amended without
    the consent of all of the Holders of the CPR Certificates then outstanding.

                                      A-38
<PAGE>
        (F) Sections 11.02(b) and 11.04(b), (c)(iii), (d), (e), (f), (g) and
    (h) shall not be amended without the consent of the Sponsor.

        (G) Subject to Section 13.01(b), this Declaration may be amended by the
    Institutional Trustee and the Litigation Trustees without the consent of the
    Holders of the CPR Certificates:

           (i) to cure any ambiguity;

           (ii) to correct or supplement any provision in this Declaration that
       may be defective or inconsistent with any other provision of this
       Declaration;

           (iii) to add to the covenants, restrictions or obligations of the
       Litigation Trustees or to alter the allocation of duties between the
       Litigation Trustees and the Institutional Trustee;

           (iv) to modify, eliminate or add to any provision of this Declaration
       to such extent as may be necessary to ensure that the Litigation Trust
       (a) will be classified for United States federal income tax purposes at
       all times as a grantor trust, (b) will not be required to register as an
       Investment Company under the Investment Company Act (including without
       limitation to conform to any change in any applicable Rule under the
       Investment Company Act or written change in interpretation or application
       thereof by any legislative body, court, government agency or regulatory
       authority) or (c) is able to issue additional CPR Certificates;

PROVIDED, HOWEVER, that no such modification, elimination or addition referred
to in clauses (i), (ii), (iii) or (iv) shall adversely affect the powers,
preferences or special rights of Holders or cause the Litigation Trust to fail
to continue to be classified as a grantor trust for purposes of United States
federal income taxation.

        (H) The Institutional Trustee may, but shall have no obligation to,
    execute any amendment which materially adversely affects its rights, powers,
    immunities or indemnities.

    Section 13.02  MEETINGS OF HOLDERS OF CPR CERTIFICATES; ACTION BY WRITTEN
CONSENT.

    (a) Meetings of the Holders may be called at any time by the Litigation
Trustees to consider and act on any matter on which Holders are entitled to act
under the terms of this Declaration, the terms of the CPR Certificates or the
rules of any stock exchange or automated quotation system on which the CPR
Certificates are listed or admitted for trading, if any. The Litigation Trustees
shall call a meeting of the Holders if directed to do so by the Holders of at
least 25% of CPR Certificates Such direction shall be given by delivering to the
Litigation Trustees one or more calls in a writing stating that the signing
Holders wish to call a meeting and indicating the general or specific purpose
for which the meeting is to be called.

    (b) Except to the extent otherwise provided in the terms of the CPR
Certificates, the following provisions shall apply to meetings of Holders:

           (i) notice of any such meeting (with a copy to the Institutional
       Trustee) shall be given to all the Holders having a right to vote thereat
       at least 20 days and not more than 60 days before the date of such
       meeting.

    Whenever a vote, consent or approval of the Holders is permitted or required
under this Declaration or the rules of any stock exchange or automated quotation
system on which the CPR Certificates are listed or admitted for trading, if any,
such vote, consent or approval may be given at a meeting of the Holders. Any
action that may be taken at a meeting of the Holders may be taken without a
meeting if a consent in writing setting forth the action so taken is signed by
the Holders owning not less than the minimum amount of CPR Certificates that
would be necessary to authorize or take such action at a meeting at which all
Holders having a right to vote thereon were present and

                                      A-39
<PAGE>
voting. Prompt notice of the taking of action without a meeting shall be given
to the Holders entitled to vote who have not consented in writing. The
Litigation Trustees may specify that any written ballot submitted to the Holders
for the purpose of taking any action without a meeting shall be returned to the
Litigation Trust within the time specified by the Litigation Trustees;

           (ii) each Holder may authorize any Person to act for it by proxy on
       all matters in which a Holder is entitled to participate, including
       waiving notice of any meeting, or voting or participating at a meeting.
       No proxy shall be valid after the expiration of 11 months from the date
       thereof unless otherwise provided in the proxy. Every proxy shall be
       revocable at the pleasure of the Holder executing it. Except as otherwise
       provided herein, all matters relating to the giving, voting or validity
       of proxies shall be governed by the General Corporation Law of the State
       of Delaware relating to proxies, and judicial interpretations thereunder,
       as if the Litigation Trust were a Delaware corporation and the Holders
       were stockholders of a Delaware corporation; each meeting of the Holders
       shall be conducted by the Litigation Trustees or by such other Person
       that the Litigation Trustees may designate; and

           (iii) unless the Business Trust Act, this Declaration or the terms of
       the CPR Certificates or the listing rules of any stock exchange on which
       the CPR Certificates are then listed for trading, if any, otherwise
       provide, the Litigation Trustees, in their sole discretion, shall
       establish all other provisions relating to meetings of Holders, including
       notice of the time, place or purpose of any meeting at which any matter
       is to be voted on by any Holders, waiver of any such notice, action by
       consent without a meeting, the establishment of a record date, quorum
       requirements, voting in person or by proxy or any other matter with
       respect to the exercise of any such right to vote.

                                  ARTICLE XIV.
         REPRESENTATIONS OF INSTITUTIONAL TRUSTEE AND DELAWARE TRUSTEE

    Section 14.01  REPRESENTATIONS AND WARRANTIES OF THE INSTITUTIONAL
TRUSTEE.  The Trustee that acts as initial Institutional Trustee represents and
warrants to the Litigation Trust and to the Sponsor at the date of this
Declaration, and each Successor Institutional Trustee represents and warrants to
the Litigation Trust at the time of the Successor Institutional Trustee's
acceptance of its appointment as Institutional Trustee, that:

    (a) the Institutional Trustee is a corporation or banking association with
trust powers, duly organized, validly existing and in good standing under the
laws of the United States or a State thereof with power and authority to execute
and deliver, and to carry out and perform its obligations under the terms of,
this Declaration;

    (b) the execution, delivery and performance by the Institutional Trustee of
this Declaration has been duly authorized by all necessary corporate action on
the part of the Institutional Trustee. This Declaration has been duly executed
and delivered by the Institutional Trustee, and it constitutes a legal, valid
and binding obligation of the Institutional Trustee, enforceable against it in
accordance with its terms, subject to applicable bankruptcy, reorganization,
moratorium, insolvency, and other similar laws affecting creditors' rights
generally and to general principles of equity (regardless of whether considered
in a proceeding in equity or at law); and

    (c) the execution, delivery and performance of this Declaration by the
Institutional Trustee does not conflict with or constitute a breach of the
charter or by-laws of the Institutional Trustee.

    Section 14.02  REPRESENTATIONS AND WARRANTIES OF THE DELAWARE TRUSTEE.  The
Trustee that acts as initial Delaware Trustee represents and warrants to the
Litigation Trust and to the Sponsor at the date of this Declaration, and each
Successor Delaware Trustee represents and warrants to the Litigation

                                      A-40
<PAGE>
Trust at the time of the Successor Delaware Trustee's acceptance of its
appointment as Delaware Trustee, that:

    (a) the Delaware Trustee, if other than an individual, is duly organized,
validly existing and in good standing under the laws of the State of Delaware,
with power and authority to execute and deliver, and to carry out and perform
its obligations under the terms of, this Declaration;

    (b) the Delaware Trustee has been authorized to perform its obligations
under the Certificate of Trust and this Declaration. This Declaration under
Delaware law constitutes a legal, valid and binding obligation of the Delaware
Trustee, enforceable against it in accordance with its terms, subject to
applicable bankruptcy, reorganization, moratorium, insolvency, and other similar
laws affecting creditors' rights generally and to general principles of equity
(regardless of whether considered in a proceeding in equity or at law); and

    (c) the Delaware Trustee is a natural person who is a resident of the State
of Delaware or, if not a natural person, an entity which has its principal place
of business in the State of Delaware and, in either case, a Person that
satisfies for the Litigation Trust the requirements of Section 3807 of the
Business Trust Act.

                                  ARTICLE XV.
                                 MISCELLANEOUS

    Section 15.01  NOTICES.  All notices provided for in this Declaration shall
be in writing, duly signed by the party giving such notice, and shall be
delivered, telecopied or mailed by first class mail, as follows:

    (a) if given to the Litigation Trust, in care of the Institutional Trustee
at the Litigation Trust's mailing address set forth below (or such other address
as the Litigation Trust may give notice of to the Holders of the CPR
Certificates):

                                         _______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:
                                          with a copy to:
                                          ______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:

                                      A-41
<PAGE>
    (b) if given to the Delaware Trustee, at the mailing address set forth below
(or such other address as the Delaware Trustee may give notice of to the Holders
of the CPR Certificates):

                                         _______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:

    (c) if given to the Institutional Trustee, at the mailing address set forth
below (or such other address as the Institutional Trustee may give notice of to
the Holders of the CPR Certificates).

                                         _______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:

    (d) if given to the Litigation Trustees, at each mailing address set forth
below (or such other address as the Litigation Trust may give notice of to the
Holders of the CPR Certificates):

                                         _______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:

                                         _______________________________________
                                          ______________________________________
                                          Attention:
                                          Facsimile:

    (e) if given to any Holder, at the address set forth on the books and
records of the Litigation Trust.

    All such notices shall be deemed to have been given when received in person,
telecopied with receipt confirmed, or mailed by first class mail, postage
prepaid, except that if a notice or other document is refused delivery or cannot
be delivered because of a changed address of which no notice was given, such
notice or other document shall be deemed to have been delivered on the date of
such refusal or inability to deliver the same.

                                      A-42
<PAGE>
    Section 15.02  GOVERNING LAW.  This Declaration and the rights of the
parties hereunder shall be governed by and interpreted in accordance with the
laws of the State of Delaware and all rights and remedies shall be governed by
such laws without regard to the principles of conflict of laws of the State of
Delaware or any other jurisdiction that would call for the application of the
law of any jurisdiction other than the State of Delaware; PROVIDED, HOWEVER,
that, to the fullest extent permitted by law, there shall not be applicable to
the Litigation Trust, the Trustees or this Declaration any provision of the laws
(statutory or common) of the State of Delaware pertaining to trusts that relate
to or regulate, in a manner inconsistent with the terms hereof (a) the filing
with any court or governmental body or agency of Trustee accounts or schedules
of Trustee fees and charges, (b) affirmative requirements to post bonds for
Trustees, officers, agents or employees of a trust, (c) the necessity for
obtaining court or other governmental approval concerning the acquisition,
holding or disposition of real or personal property, (d) fees or other sums
payable to trustees, officers, agents or employees of a trust, (e) the
allocation of receipts and expenditures to income or principal,
(f) restrictions or limitations on the permissible nature, amount or
concentration of trust investments or requirements relating to the titling,
storage or other manner of holding or investing trust assets or (g) the
establishment of fiduciary or other standards of responsibility or limitations
on the acts or powers of trustees that are inconsistent with the limitations or
liabilities or authorities and powers of the trustees as set forth or referenced
in this Declaration. Section 3540 and, to the fullest extent permitted by
applicable law, Section 3561, of Title 12 of the Delaware Code shall not apply
to the Litigation Trust.

    Section 15.03  INTENTION OF PARTIES.  It is the intention of the parties
hereto that the Litigation Trust be classified for United States federal income
tax purposes as a grantor trust that is formed to hold the Commitment and
liquidate the Commitment, as provided for herein. The provisions of this
Declaration shall be interpreted to further this intention of the parties.

    Section 15.04  HEADINGS.  Headings contained in this Declaration are
inserted for convenience of reference only and do not affect the interpretation
of this Declaration or any provision hereof.

    Section 15.05  SUCCESSORS AND ASSIGNS.  Whenever in this Declaration any of
the parties hereto is named or referred to, the successors and assigns of such
party shall be deemed to be included, and all covenants and agreements in this
Declaration by the Sponsor and the Trustees shall bind and inure to the benefit
of their respective successors and assigns, whether or not so expressed.

    Section 15.06  PARTIAL ENFORCEABILITY.  If any provision of this
Declaration, or the application of such provision to any Person or circumstance,
shall be held invalid, the remainder of this Declaration, or the application of
such provision to persons or circumstances other than those to which it is held
invalid, shall not be affected thereby.

    Section 15.07  SPECIFIC PERFORMANCE.  The Sponsor hereby agrees that the
obligations imposed on it in this Declaration are special, unique and of an
extraordinary character, and that, in the event of breach by the Sponsor,
damages would not be an adequate remedy and the Sponsor shall be entitled to
specific performance and injunctive and other equitable relief, including
declaratory relief, in addition to any other remedy to which it may be entitled,
at law or in equity; and the Sponsor hereby further agrees to waive any
requirement for the securing or posting of any bond in connection with the
obtaining of any such injunctive or other equitable relief.

    Section 15.08  COUNTERPARTS.  This Declaration may contain more than one
counterpart of the signature page and this Declaration may be executed by the
affixing of the signature of each of the Trustees and the Sponsor to any of such
counterpart signature pages. All of such counterpart signature pages shall be
read as though one, and they shall have the same force and effect as though all
of the signers had signed a single signature page.

                                      A-43
<PAGE>
    Section 15.09  CONSENT TO JURISDICTION.  The Trustees and any Person
becoming a Holder hereunder hereby consent to (i) the non-exclusive jurisdiction
of the Courts of the State of Delaware and any Federal Court sitting in
Wilmington, Delaware, and (ii) service of process by mail at their last known
address.

    Section 15.10  DEFAULT RULES.  Regardless of whether this Declaration
specifically refers to particular Default Rules:

    (a) if any provision of this Declaration conflicts with a Default Rule, the
provision of this Declaration controls and the Default Rule is modified or
negated accordingly,

    (b) if it is necessary to construe a Default Rule as modified or negated in
order to effectuate any provision of this Declaration, the Default Rule is
modified or negated accordingly, and

    (c) the fact that some Default Rules are referred to herein shall not limit
the application of Section 15.10(a) or (b) in those instances where no Default
Rule has been referred to herein.

                                      A-44
<PAGE>
    IN WITNESS WHEREOF, the undersigned have caused these presents to be
executed as of the day and year first above written.

                                         [_____________________________________]
                                          as Delaware Trustee
                                          By:___________________________________
                                          Name:
                                          Title:

                                         [_____________________________________]
                                          as Institutional Trustee
                                          By:___________________________________
                                          Name:
                                          Title:

                                          BANK UNITED CORP.,
                                          as Sponsor
                                          By:___________________________________
                                          Name:
                                          Title:

                                          BANK UNITED LITIGATION
                                          CONTINGENT PAYMENT RIGHTS LITIGATION
                                          TRUST
                                          By:___________________________________
                                          ______________, as Litigation Trustee
                                          By:___________________________________
                                          ______________, as Litigation Trustee

                                      A-45
<PAGE>
                   [TO BE UPDATED TO REFLECT FINAL AGREEMENT]

                       EXHIBIT B TO DECLARATION OF TRUST
                  FORM OF CONTINGENT PAYMENT RIGHT CERTIFICATE
                         [FORM OF FACE OF CERTIFICATE]

[The following two paragraphs apply only to Certificates in global form.]
[UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY LITIGATION TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK,
NEW YORK, TO THE LITIGATION TRUST OR ITS AGENT FOR REGISTRATION OF TRANSFER,
EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF
CEDE & CO. OR SUCH OTHER NAME AS IS REQUIRED BY AN AUTHORIZED REPRESENTATIVE OF
DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

[TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT
NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S
NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO
TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE DECLARATION
REFERRED TO BELOW.]

<TABLE>
<S>                                            <C>
--------------------------------------------   --------------------------------------------
CERTIFICATE NUMBER                             NUMBER OF CONTINGENT PAYMENT RIGHT
                                               CERTIFICATES

                  CUSIP NO
</TABLE>

                                      A-46
<PAGE>
      CERTIFICATE EVIDENCING UNDIVIDED BENEFICIAL INTERESTS IN THE ASSETS
                                       OF
          BANK UNITED CORP. LITIGATION CONTINGENT PAYMENT RIGHTS TRUST
                     CONTINGENT PAYMENT RIGHT CERTIFICATES

    BANK UNITED CORP. LITIGATION CONTINGENT PAYMENT RIGHTS TRUST, a statutory
business trust created under the laws of the State of Delaware (the "Litigation
Trust"), hereby certifies that             (the "Holder") is the registered
owner of certificates of the Litigation Trust representing undivided beneficial
interests in the assets of the Litigation Trust, designated the Contingent
Payment Right Certificates (the "CPR Certificates"). Subject to the Declaration
(as defined below), the CPR Certificates are transferable on the books and
records of the Litigation Trust, in person or by a duly authorized attorney,
upon surrender of this Certificate duly endorsed and in proper form for
transfer. The CPR Certificates represented hereby are issued pursuant to the
designation, rights, privileges, restrictions, preferences and other terms and
provisions of, and shall in all respects be subject to, the provisions of the
Amended and Restated Declaration of Trust of the Litigation Trust dated as of
February   , 2001, among Jonathon K. Heffron and Salvatore A. Ranieri as
Litigation Trustees (the "Litigation Trustees"), First Union Trust Company,
National Association, as Delaware Trustee, First Union Trust Company, National
Association, as Institutional Trustee, Bank United Corp., as Sponsor, and the
holders from time to time of undivided beneficial interests in the assets of the
Litigation Trust, including the designation of the terms of the CPR
Certificates, as the same may be amended from time to time (the "Declaration").
Capitalized terms used herein but not defined shall have the meaning given them
in the Declaration. The [Institutional Trustee] will provide a copy of the
Declaration to the Holder without charge upon written request to the Litigation
Trust at its principal place of business.

    Upon receipt of this CPR Certificate, the Holder is bound by the Declaration
and is entitled to the benefits thereunder.

    This CPR Certificate is governed by, and construed in accordance with, the
laws of the State of Delaware, without regard to principles of conflict of laws.

    IN WITNESS WHEREOF, the Litigation Trust has duly executed this CPR
Certificate.

                          BANK UNITED CORP. LITIGATION
                        CONTINGENT PAYMENT RIGHTS TRUST

                                          [By: Bank United Corp.] as Sponsor
                                           By:

                                           _____________________________________
                                          Name
                                          Title:  [Authorized Officer]

                                          [By: _________________________________

                                           _____________________________________
                                          Name:

                                      A-47
<PAGE>
                                           Title:  Litigation Trustee
                                           By: _________________________________

                                           _____________________________________
                                          Name:
                                          Title:  Litigation Trustee
                                          By: __________________________________

                                           _____________________________________
                                          Name:
                                          Title:  Litigation Trustee
                                          By: __________________________________

                                           _____________________________________
                                          Name:
                                          Title:  Litigation Trustee]
                                          Dated:

                                      A-48
<PAGE>
                         CERTIFICATE OF AUTHENTICATION

    This is one of the CPR Certificates referred to in the within-mentioned
Declaration.

            First Union Trust Company, National Association, as the
                             Institutional Trustee
                                      By:

                            ------------------------

                              [Authorized Officer]

                        [FORM OF REVERSE OF CERTIFICATE]

    Distributions payable on each CPR Certificate will be payable from time to
time upon the receipt by the Bank United Corp. Litigation Contingent Payment
Rights Trust (The "Litigation Trust") of payments of the Proceeds Amount (as
defined herein) from the Bank United Corp. Payment Rights Trust, a Delaware
Business Trust (the "Payment Trust") pursuant to the Commitment (as defined
herein). The Payment Trust shall pay the Proceeds Amount to the Litigation Trust
upon its receipt of the Commitment Amount (as defined herein) from Bank United
Corp. Corp., a Delaware corporation (together with its successors, "Bank United
Corp."), pursuant to the Commitment. The Commitment means the Commitment
Agreement (the "Commitment") dated as of February   , 2001, between Bank United
Corp., the Payment Trust and the Litigation Trust, entered into by Bank United
Corp. in connection with the merger (the "Merger") of Bank United Corp. with and
into Washington Mutual, a Washington corporation (together with its successors,
"Washington Mutual"). The Proceeds Amount means the Commitment Amount plus any
interest earned thereon less certain taxes. The Commitment Amount means an
amount equal to the Litigation Proceeds (as defined herein) minus the
Reimbursements (as defined herein) plus the Assumed Tax Benefit (as defined
herein). Litigation Proceeds means an amount equal to any and all cash payments
(the "Cash Proceeds") and non-cash payments (the "Non-Cash Proceeds") actually
received by Bank United Corp., Bank United (as defined herein) or any of their
affiliates other than Hyperion Partners L.P. (the "Bank United Group") pursuant
to a final, non-appealable judgment or a final settlement of the litigation
claims of Bank United Corp. and Bank United, a wholly-owned subsidiary of Bank
United Corp. (together with its successors, "Bank United"), in the litigation
filed on July 25, 1995, by the Sponsor, Bank United and Hyperion Partners L.P.
against the United States in the U.S. Court of Federal Claims for alleged
failures of the United States to adhere to its agreement to waive or forbear
from enforcing certain provisions concerning regulatory capital requirements,
liquidity requirements, accounting requirements and other matters, and any
substitute or ancillary action, litigation or arbitration with respect to the
claims made in such action (the "Litigation"). Reimbursements means an amount
equal to (a) the amounts paid by Bank United Corp. to the Litigation Trust and
the Payment Trust to pay such trusts' expenses pursuant to the Commitment (other
than amounts payable to the Litigation Trustees), plus (b) interest on the
amounts paid by Bank United Corp. to the Litigation Trust and the Payment Trust
to pay such trusts' expenses pursuant to the Commitment calculated from the time
of any such withdrawal at an annual interest rate equal to seven percent (7%) on
the amount of such aggregate payments not exceeding $5,000,000, (B) ten percent
(10%) on the amount of such aggregate payments greater than $5,000,000 but not
exceeding $10,000, and (C) fifteen percent (15%) on the amount of such aggregate
payments greater than $10,000,000, plus (c) the Assumed Tax Liability (as
defined herein), plus (d) in the event the Litigation Proceeds are required to
be included in income for federal income tax purposes in a taxable year prior to
the year such proceeds are received in cash (because of either the accrual of
Cash Proceeds before the payment thereof or the time required to liquidate
Non-Cash Proceeds), interest on any cash payment of taxes on such income at an
annual interest rate of seven percent (7%) compounded annually from the date of
such payment of taxes to the date of receipt of cash, plus (e) the aggregate
amount of any Damages (as defined herein) actually suffered by

                                      A-49
<PAGE>
any Bank United party, plus (f) the aggregate amount of any indemnification
provided by Bank United to either of the Litigation Trustees in connection with
claims relating to the Litigation Trust or the Payment Trust, plus (g) any
expenses reasonably incurred by Bank United in connection with the liquidation
of any Non-Cash Proceeds. Assumed Tax Benefit means an amount equal to the tax
benefit that would be allowed to the Bank United Group under Section 483(a) of
the Internal Revenue Code, computed based on certain assumptions, from payments
on the Commitment plus an amount equal to the tax benefit that would be allowed
to the Bank United Group by reason of deductions for expenses of the trusts
(other than amounts payable to the Litigation Trustees) and for the fair market
value of the CPR Certificates issued to the Litigation Trustees pursuant to the
Litigation Trustee Agreements, computed on certain assumptions. The Assumed Tax
Liability means an amount equal to the income (including franchise) tax
liability of the Bank United Group (not giving effect to any deductions
attributable to payments of the Commitment Amount) attributable to the receipt
of the Litigation Proceeds computed on certain assumptions. The Payment Amount
means, with respect to each payment of the Proceeds Amount received by the
Litigation Trust pursuant to the Commitment, such payment of the Proceeds Amount
received by the Litigation Trust less the amount of any accrued but unpaid
expenses payable by the Litigation Trust, plus interest or income, if any,
received by the Litigation Trust on such payment of the Proceeds Amount, less
amounts retained by the Litigation Trust as the Retained Amount (as defined
herein). The Retained Amount means $1.0 million (or such greater amount as the
Litigation Trustees shall reasonably determine may be reasonably likely to be
required to pay additional expenses or to satisfy the Litigation Trust's
indemnification obligations). The Litigation Trustees' obligation to make
payments to the Holders shall be subject to the requirement that the Litigation
Trust retain, from payments of the Proceeds Amount, the Retained Amount for a
period (the "Retained Amount Period") of one year (or such longer period as the
Litigation Trustees shall reasonably determine (initially or at any time prior
to the then scheduled termination of the Retained Amount Period) may be
reasonably likely to be required) to satisfy all expenses, costs and claims and
indemnification obligations of the Litigation Trust which may be incurred or
which may arise after the Proceeds Amount is paid in full.

    The Payment Trust will promptly make payments from time to time, but in no
event prior to the expiration of the 366 day period commencing with the
distribution of the CPR Certificates to the Holders, to the Litigation Trust of
the Proceeds Amount upon the receipt of the applicable payment of the Commitment
Amount from the Sponsor.

    The Litigation Trust will make payments from time to time to the Holders of
the Payment Amounts upon the receipt of the applicable payments of the Proceeds
Amount from the Payment Trust. Each CPR Certificate will entitle the Holder
thereof to receive a fraction (equal to 1 divided by the total number of CPR
Certificates outstanding) of any Payment Amount within 60 days after the
Litigation Trust receives a Proceeds Amount.

    Within 90 days of the expiration of the Retained Amount Period, the
Litigation Trust will pay to the Holders any remaining portion of the Retained
Amount. Each CPR Certificate will entitle the Holder thereof to receive a
fraction (equal to 1 divided by the total number of CPR Certificates then
outstanding) of the remaining portion of the Retained Amount.

    The Litigation Trust shall mandatorily redeem for $0.01 in cash each CPR
Certificate issued to a Bank United Corp. stockholder who provides a notice of
intent to exercise appraisal rights in the Merger with respect to shares of Bank
United Corp. common stock. If any such Bank United Corp. stockholder
subsequently withdraws, or fails to perfect, such appraisal demand, Washington
Mutual in its capacity as successor to Bank United Corp., shall deliver to such
stockholder one CPR Certificate for each share of Bank United Corp. common stock
as to which such appraisal demand was withdrawn and not perfected.

                                      A-50
<PAGE>
    To the fullest extent permitted by law, no Indemnified Person (as defined in
the Declaration) shall be liable, responsible or accountable in damages or
otherwise to the Litigation Trust or any other Indemnified Person or member of
the Bank United Group for any loss, damage or claim incurred by reason of any
act or omission performed or omitted by such Indemnified Person, except that
(i) the Litigation Trustees shall be liable for any such loss, damage or claim
incurred by reason of any act or omission performed or omitted by them if it
shall be established in a final and nonappealable judicial determination by
clear and convincing evidence that any such act or omission of the Litigation
Trustees was undertaken with deliberate intent to injure the Holders or with
reckless disregard for the best interests of such Holders and, in any event, any
liability will be limited to actual, proximate, quantifiable damages, and
(ii) the Institutional Trustee or the Delaware Trustee shall be liable for any
such loss, damage or claim incurred by reason of the Institutional Trustee's or
Delaware Trustee's (as the case may be) gross negligence or willful misconduct
with respect to such acts or omissions.

    To the fullest extent permitted by law, no Indemnified Person (as defined in
the Declaration), shall have any liability to the Litigation Trust, the Payment
Trust, the Trustees of either Trust (the "Trustees") or the Holders. Without
limiting the generality of the foregoing, to the fullest extent permitted by
law, none of the Holders (in their capacity as Holders), the Trustees, the
Payment Trust, or the Litigation Trust shall have the right to enforce,
institute or maintain a suit, action or proceeding against an Indemnified Person
relating to the formation of the Litigation Trust, the entering into of the
Commitment, the distribution of the CPR Certificates, the Litigation or actions
of the Trustees in their capacity (or purportedly in their capacity) as
Trustees. The Litigation Trust (or the Litigation Trustees on behalf of the
Litigation Trust) may enforce, institute or maintain a suit, action or
proceeding against (i) Bank United Corp. for breach of its obligations under the
Declaration, (ii) Bank United Corp. for its breach of any of its obligations
under the Commitment or its failure to deliver any CPR Certificate when due or
to return to the Litigation Trust for cancellation any CPR Certificate required
to be returned pursuant to the Merger Agreement when so required, (iii) Bank
United Corp. for failure to make payments to the Litigation Trust pursuant to
the Commitment, (iv) Bank United for breach of any depository relationship
obligations it may have with respect to payments made by Bank United Corp. to
the Litigation Trust or the Payment Trust, or (v) the Payment Trust for breach
of the Commitment and in each case, Bank United Corp., the Payment Trust, Bank
United or their successors, as the case may be, may be liable to the Litigation
Trust in connection with such suit, action or proceeding; PROVIDED, that fees
and expenses incurred by the Bank United Group in such a suit, action or
proceeding shall not be set off against the Litigation Proceeds (in order to
calculate the Commitment Amount) if the Litigation Trust or the Litigation
Trustees prevail in such a suit, and, if in connection with suits brought
pursuant to clauses (i) through (v) inclusive, shall be deemed expenses of the
Litigation Trust payable by the Litigation Trust out of the Proceeds Amount,
including any Retained Amount, if the Litigation Trustees do not prevail.

    The Holders will have no voting rights (except in connection with certain
amendments to the Declaration described in Article XIII of the Declaration and
except in connection with the removal of the Institutional Trustee and the
Delaware Trustee for cause, or, if a default by the Litigation Trust with
respect to its payment obligations under Article IV of the Declaration shall
have occurred and be continuing, with or without cause), no liquidation
preference and no rights to dividends or distributions other than their pro rata
share of the Payment Amount and any portion of the Retained Amount remaining at
the expiration of the Retained Amount Period, plus any other Litigation Trust
assets.

    THE CPR CERTIFICATES ARE NOT SAVINGS ACCOUNTS OR DEPOSITS AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION.

    The Holders have no rights with respect to, or interest in, (i) the
Litigation, (ii) Bank United Corp., (iii) Bank United, or (iv) any amount
received by Bank United Corp., Bank United or any other member of the Bank
United Group with respect to the Litigation, including any judgment or
settlement proceeds.

                                      A-51
<PAGE>
    Each Holder acknowledges that: (i) the Litigation is solely an asset of Bank
United Corp., Bank United and their successors, (ii) the Litigation shall be
conducted by and on behalf of Bank United Corp., Bank United and their
successors solely in accordance with the instructions of the Litigation Trustees
pursuant to the Declaration, (iii) the Litigation Trustees shall have the sole
and exclusive right to direct Bank United Corp., Bank United and their
successors to take (or not take) actions relating to the Litigation as
contemplated by the Declaration and may, among other things, instruct Bank
United and its successors to dismiss, settle or cease prosecuting the Litigation
at any time without obtaining any cash or other recovery, or upon obtaining any
such cash or other recovery as the Litigation Trustees may determine, and
(iv) the Litigation Trustees have the sole and exclusive right to take or not
take other actions contemplated by the Declaration relating to the Litigation
(including, without limitation, any decision with respect to the incurrence of
expenses).

    Nothing in the Declaration or this CPR Certificate shall be construed to
create any partnership or joint venture between Bank United Corp., Bank United,
Washington Mutual or any member of the Bank United Group, and the Holders.

                                      A-52
<PAGE>
                                                                      APPENDIX B

                                  AMENDED AND
                                    RESTATED
                              DECLARATION OF TRUST

                                       OF

                               BANK UNITED CORP.
                              PAYMENT RIGHTS TRUST

                               FEBRUARY   , 2001
<PAGE>
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                        ARTICLE I.
                              INTERPRETATION AND DEFINITIONS

Section 1.01   Definitions.................................................  B-2

                                       ARTICLE II.
                                       ORGANIZATION

Section 2.01   Name........................................................  B-6
Section 2.02   Office......................................................  B-6
Section 2.03   Purposes and Powers of the Litigation Trust.................  B-6
Section 2.04   Title to Property of the Litigation Trust...................  B-7
Section 2.05   Mergers.....................................................  B-7
Section 2.06   Nature of Obligations.......................................  B-8

                                       ARTICLE III.
                                         TRUSTEES

Section 3.01   Authority...................................................  B-8
Section 3.02   Number of Trustees..........................................  B-8
Section 3.03   Delaware Trustee............................................  B-8
Section 3.04   Institutional Trustee; Eligibility..........................  B-9
Section 3.05   Appointment, Removal and Resignation of the Institutional
                 and Delaware Trustees.....................................  B-9
Section 3.06   Vacancies Among Relevant Trustees; Effect of Vacancies......  B-11
Section 3.07   The Litigation Trustees.....................................  B-11
Section 3.08   Limitation on Liability of Litigation Trustees..............  B-11
Section 3.09   Resignation of a Litigation Trustee.........................  B-11
Section 3.10   Appointment of Successor Litigation Trustees................  B-11
Section 3.11   Meetings of the Trustees....................................  B-12
Section 3.12   Powers and Duties of Sponsor, Litigation Trustees and
                 Institutional Trustee.....................................  B-12
Section 3.13   Certain Duties and Responsibilities of the Trustees.........  B-15
Section 3.14   Certain Rights of the Institutional Trustee.................  B-16
Section 3.15   Lists of Holders of CPR Certificates........................  B-18
Section 3.16   Execution of Documents......................................  B-18
Section 3.17   Not Responsible for Recitals or Issuance of CPR
                 Certificates..............................................  B-18
Section 3.18   Filings with the Commission.................................  B-18
Section 3.19   Default; Notice.............................................  B-18

                                       ARTICLE IV.
                                   PAYMENTS TO HOLDERS

Section 4.01   Payment to Holders..........................................  B-18
Section 4.02   Timing of Payments..........................................  B-19
Section 4.03   Default; Waiver.............................................  B-19
</TABLE>

                                       i
<PAGE>

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                        ARTICLE V.
                             EXPENSES AND THE RETAINED AMOUNT

Section 5.01   Expenses....................................................  B-19
Section 5.02   Return of Funds.............................................  B-19

                                       ARTICLE VI.
                                        [RESERVED]                            B-19

                                       ARTICLE VII.
                      ISSUANCE AND DISTRIBUTION OF CPR CERTIFICATES
Section 7.01   The Beneficial Interest.....................................  B-19

                                      ARTICLE VIII.
                       DISSOLUTION AND TERMINATION OF PAYMENT TRUST

Section 8.01   Dissolution and Termination of Payment Trust................  B-19

                                       ARTICLE IX.
                                  TRANSFER OF INTERESTS

Section 9.01   General.....................................................  B-20

                                        ARTICLE X.
                               HOLDERS OF CPR CERTIFICATES

Section 10.01  Limitations on Rights of Holders............................  B-20
Section 10.02  Limitations on Suits by Holders.............................  B-21

                                       ARTICLE XI.
                    LIMITATION OF LIABILITY OF HOLDERS OF SECURITIES,
                                   TRUSTEES OR OTHERS

Section 11.01  Liability...................................................  B-21
Section 11.02  Exculpation.................................................  B-21
Section 11.03  Fiduciary Duty..............................................  B-22
Section 11.04  Indemnification.............................................  B-23
Section 11.05  Outside Businesses..........................................  B-24
Section 11.06  Compensation; Fee...........................................  B-24

                                       ARTICLE XII.
                                        ACCOUNTING

Section 12.01  Fiscal Year.................................................  B-24
Section 12.02  Certain Accounting Matters..................................  B-24
Section 12.03  Banking.....................................................  B-25
Section 12.04  Withholding.................................................  B-25

                                      ARTICLE XIII.
                                 AMENDMENTS AND MEETINGS

Section 13.01  Amendments..................................................  B-25
Section 13.02  Meetings of Holders of CPR Certificates; Action by Written
                 Consent...................................................  B-26
</TABLE>

                                       ii
<PAGE>

<TABLE>
<CAPTION>
                                                                             PAGE NO.
                                                                             --------
<S>            <C>                                                           <C>
                                       ARTICLE XIV.
                         REPRESENTATIONS OF INSTITUTIONAL TRUSTEE
                                   AND DELAWARE TRUSTEE

Section 14.01  Representations and Warranties of the Institutional
                 Trustee...................................................  B-27
Section 14.02  Representations and Warranties of the Delaware Trustee......  B-27

                                       ARTICLE XV.
                                      MISCELLANEOUS

Section 15.01  Notices.....................................................  B-28
Section 15.02  Governing Law...............................................  B-29
Section 15.03  Intention of Parties........................................  B-29
Section 15.04  Headings....................................................  B-29
Section 15.05  Successors and Assigns......................................  B-30
Section 15.06  Partial Enforceability......................................  B-30
Section 15.07  Specific Performance........................................  B-30
Section 15.08  Counterparts................................................  B-30
Section 15.09  Consent to Jurisdiction and Service of Process..............  B-30
Section 15.10  Default Rules...............................................  B-30
</TABLE>

                                      iii
<PAGE>
                              AMENDED AND RESTATED
                              DECLARATION OF TRUST
                                       OF
                               BANK UNITED CORP.
                              PAYMENT RIGHTS TRUST
                               FEBRUARY   , 2001

    This Amended and Restated Declaration of Trust (the "Declaration" or, this
"Agreement") dated and effective as of February   , 2001, by the Trustees (as
defined herein), Bank United Corp. (along with its successors, the "Sponsor")
and by Bank United Contingent Payment Rights Trust, a Delaware business trust
(the "Litigation Trust"), being the sole holder of the beneficial interest in
the assets of the Bank United Litigation Payment Trust (the "Payment Trust") to
be issued pursuant to this Declaration;

    WHEREAS, the Delaware Trustee (as defined herein) and the Sponsor, by a
Declaration of Trust dated and effective as of January 8, 2001 and by a
Certificate of Trust filed with the Secretary of State of the State of Delaware
on the same date, established a statutory business trust under the Business
Trust Act (as defined herein) for the sole purposes of holding and distributing
the Proceeds Amount (as defined herein) to the Litigation Trust or its
successor;

    WHEREAS, the Litigation Trust has been established as a statutory business
trust under the Business Trust Act for the sole purpose of holding the
Commitment Amount (as defined herein) and of filing a registration statement
under the Securities Act (as defined herein) with the Securities and Exchange
Commission relating to the issuance of CPR Certificates (as defined herein);

    WHEREAS, pursuant to this Declaration, the sole beneficial interests in the
Payment Trust is being issued to the Sponsor;

    WHEREAS, the Sponsor and Washington Mutual, Inc. ("Washington Mutual") have
entered into an Agreement and Plan of Merger (the "Merger Agreement"), dated as
of August 18, 2000, as amended, and the Sponsor and CPR Merger Corporation, a
wholly owned subsidiary of the Sponsor ("Merger Sub"), have entered into an
Agreement and Plan of Merger (the "Plan of Reorganization"), which together
contemplate that (i) immediately prior to the effective time of the merger (the
"Merger") of the Sponsor with and into Washington Mutual, (ii) Merger Sub will
merge (the "Reorganization") with and into the Sponsor, as a result of which
each share of Class A Common Stock, par value $0.01 per share, of the Sponsor
("Sponsor Common Stock"), issued and outstanding immediately prior to the
effective time of the Reorganization (the "Effective Time") will be
automatically converted into one new share of Sponsor Common Stock and the right
to receive one CPR Certificate, with appropriate and proportionate adjustments
to be made to other equity-based securities of the Sponsor, (iii) immediately
prior to the Effective Time, the Litigation Trust will issue CPR Certificates to
the Sponsor, which CPR Certificates will represent assignable and transferable
undivided beneficial interests in the assets of the Litigation Trust, in part to
be issued in the Reorganization, in part to be held for future issuance as more
fully provided in the Plan of Reorganization and herein, and in part to be
issued to the Litigation Trustees (as defined herein) as compensation pursuant
to the terms of the Litigation Trustee Agreements (as defined herein) and
(iv) at the Effective Time, and effective at the Effective Time, the Sponsor
will enter into a Commitment Agreement (the "Commitment"), in the form attached
hereto as EXHIBIT A, pursuant to which the Sponsor will be obligated to pay to
the Payment Trust from time to time an aggregate amount equal to the Commitment
Amount, and the Payment Trust will distribute to the Litigation Trust the
Proceeds Amounts (as defined herein).

    WHEREAS, the Litigation Trust will hold the Commitment and the Litigation
Trustees of the Litigation Trust will, upon the effectiveness of the Commitment,
instruct the Sponsor and Bank United,

                                      B-1
<PAGE>
a wholly-owned subsidiary of the Sponsor (along with its successors, "Bank
United") pursuant to the terms of the Litigation Trust Declaration (as defined
herein) as to the administration of the litigation claims of the Sponsor and
Bank United, and any of their successors, in the litigation filed on July 25,
1995, by the Sponsor, Bank United and Hyperion Partners L.P. against the United
States in the U.S. Court of Federal Claims for alleged failures of the United
States to adhere to its agreement to waive or forbear from enforcing certain
provisions concerning regulatory capital requirements, liquidity requirements,
accounting requirements and other matters, and any substitute or ancillary
action, litigation or arbitration with respect to the claims made in such action
(the "Litigation");

    WHEREAS, nothing in this Declaration shall be deemed to be or to effect an
assignment (within the meaning of 31 U.S.C. Section 3727) of the Litigation; and

    NOW, THEREFORE, it being the intention of the parties hereto to establish
the Payment Trust as a statutory business trust under the Business Trust Act and
that this Declaration constitute the governing instrument of such statutory
business trust, the Trustees declare that all assets contributed to the Payment
Trust will be held in trust for the benefit of the Litigation Trust as the sole
holder of the beneficial interest in the assets of the Payment Trust, subject to
the provisions of this Declaration.

                                   ARTICLE I.
                         INTERPRETATION AND DEFINITIONS

    Section 1.01  DEFINITIONS.

    Unless the context otherwise requires:

    (a) capitalized terms used in this Declaration but not defined in the
preamble above have the respective meanings assigned to them in this
Section 1.01;

    (b) a term defined anywhere in this Declaration has the same meaning
throughout;

    (c) all references to "the Declaration" or "this Declaration" are to this
Declaration, in its entirety, as modified, supplemented or amended from time to
time, and not to any particular Article, Section or subsection;

    (d) all references to "herein" or "hereunder" refer to this Declaration in
its entirety, as modified, supplemented or amended from time to time, and not to
any particular Article, Section or subsection;

    (e) all references in this Declaration to Articles and Sections and Exhibits
are to Articles and Sections of and Exhibits to this Declaration unless
otherwise specified;

    (f) a reference to the singular includes the plural and vice versa; and

    (g) a reference to the masculine includes the feminine and vice versa.

    "Affiliate" has the same meaning as given to that term in Rule 405 of the
Securities Act or any successor Rule thereunder.

    "Agreement" has the meaning set forth in the recitals hereof.

    "Authorized Officer" of a Person means any Person that is authorized to bind
such Person.

    "Bank United" has the meaning set forth in the recitals hereof.

    "Bank United Group" means the Sponsor, Bank United and any of their
respective successors, their subsidiaries and Affiliates and the subsidiaries
and Affiliates of their respective successors, including without limitation
Washington Mutual, Inc. and its Affiliates and subsidiaries after the Merger,
PROVIDED that Hyperion shall not be deemed to be a member of the Bank United
Group.

    "Bank United Litigation Committee" has the meaning set forth in
Section 3.11(b).

                                      B-2
<PAGE>
    "Beneficial Interest" has the meaning set forth in Section 7.01(a).

    "Business Day" means any day other than Saturday, Sunday or any other day on
which banking institutions in Seattle (in the State of Washington), Houston (in
the State of Texas), or Wilmington (in the State of Delaware) are permitted or
required by any applicable law to close.

    "Business Trust Act" means Chapter 38 of Title 12 of the Delaware Code, 12
Del. Code sec. 3801 et seq., as it may be amended from time to time, or any
successor legislation.

    "Code" means the Internal Revenue Code of 1986, as amended from time to
time, or any successor legislation.

    "Commission" means the Securities and Exchange Commission.

    "Commitment" has the meaning set forth in the recitals hereof.

    "Commitment Amount" has the meaning set forth in the Commitment.

    "Corporate Trust Office" means the office of the Institutional Trustee at
which the corporate trust business of the Institutional Trustee shall, at any
particular time, be principally administered, which office at the date of
execution of this Declaration is located at Rodney Square, Suite 102, 920 King
Street, New Castle County, Wilmington, Delaware 19801, Attention:____________;
facsimile number____________.

    "CPR Certificates" means the Contingent Payment right certificates,
including the Contingent Payment right certificates issued immediately prior to
the Effective Time and any other Contingent Payment right certificates issued by
the Litigation Trust.

    "Damages" has the meaning set forth in Section 11.04(a).

    "Declaration" has the meaning set forth in the preamble hereto.

    "Default Rule" means a rule stated in the Business Trust Act (i) which
structures, defines, or regulates the finances, governance, operations or other
aspects of a Delaware business trust organized under the Business Trust Act, and
(ii) which applies except to the extent it is negated or modified through the
provisions of a governing instrument.

    "Delaware Trustee" has the meaning set forth in Section 3.03(a).

    "Effective Date" has the meaning set forth in the recitals hereof.

    "Effective Time" has the meaning set forth in the recitals hereof.

    "Exchange Act" means the Securities Exchange Act of 1934, as amended from
time to time, or any successor legislation.

    "Fiscal Year" has the meaning set forth in Section 12.01.

    "Holder" means the Litigation Trust as the sole holder of the Beneficial
Interest of the Payment Trust issued pursuant to this Declaration, such Person
being a beneficial owner within the meaning of the Business Trust Act.

    "Hyperion" means Hyperion Partners L.P., a Delaware limited partnership.

    "Indemnified Person" means (a) the Institutional Trustee, the Delaware
Trustee, any Affiliate of the Institutional Trustee or the Delaware Trustee, and
any officers, directors, stockholders, members, partners, employees,
representatives, custodians, nominees or agents of the Institutional Trustee and
the Delaware Trustee; (b) any Litigation Trustee; (c) any Affiliate of any
Litigation Trustee; (d) any partners, employees, representatives, agents,
counsel and other advisors of any Litigation Trustee;

                                      B-3
<PAGE>
(e) any member of the Bank United Litigation Committee; (f) any officer,
employee, representative, agent, counsel or other advisors of the Payment Trust
or its Affiliates.

    "Institutional Trustee" means the Trustee meeting the eligibility
requirements set forth in Section 3.04 and duly appointed pursuant to this
Declaration.

    "Investment Company" means an investment company as defined in the
Investment Company Act.

    "Investment Company Act" means the Investment Company Act of 1940, as
amended from time to time, or any successor legislation.

    "Litigation" has the meaning set forth in the recitals hereof.

    "Litigation Proceeds" has the meaning set forth in the Commitment.

    "Litigation Trust" has the meaning set forth in the first paragraph of this
Declaration.

    "Litigation Trust Declaration" means the Amended and Restated Declaration of
Trust entered into on even date herewith by the Trustees (as defined therein),
the Sponsor, and by the holders, from time to time, of CPR Certificates.

    "Litigation Trustees" has the meaning set forth in Section 3.07.

    "Litigation Trustee Agreements" means the Litigation Trustee Agreements,
dated as of August 18, 2000, entered into by each of the initial Litigation
Trustees and the Sponsor.

    "Litigation Trust Holder" means a Person in whose name a CPR Certificate is
registered on the register maintained by the Registrar pursuant to the
Litigation Trust Declaration, such Person being a beneficial owner of the
Litigation Trust within the meaning of the Business Trust Act.

    "Litigation Trust Property" means (a) the Commitment and all proceeds and
rights in respect of the Commitment and (b) any other assets that may be held
from time to time by the Litigation Trust.

    "Merger" has the meaning set forth in the recitals hereof.

    "Merger Agreement" has the meaning set forth in the recitals hereof.

    "Non-Cash Proceeds" has the meaning set forth in the Commitment.

    "Officers' Certificates" means, (i) with respect to any Person other than
Litigation Trustees, a certificate signed by two Authorized Officers of such
Person, and (ii) with respect to the Litigation Trustees, a certificate signed
by a majority of the Litigation Trustees then in office. Any Officers'
Certificate delivered with respect to compliance with a condition or covenant
provided for in the Declaration shall include:

        (i) a brief statement of the nature and scope of the examination or
    investigation undertaken by each Authorized Officer or Litigation Trustee in
    rendering the Certificate; and

        (ii) a statement as to whether, in the opinion of each such Authorized
    Officer or Litigation Trustee, such condition or covenant has been complied
    with.

    "Payment Amount" shall mean, with respect to each distribution of the
Proceeds Amount received by the Litigation Trust pursuant to the Commitment,
such payment of the Proceeds Amount received by the Litigation Trust (including
the amount of cash resulting from the monetization by the Sponsor of any
Non-Cash Proceeds) less the amount of any accrued but unpaid expenses payable by
the Litigation Trust, plus interest or income, if any, received by the
Litigation Trust on such payment of the Proceeds Amount, less amounts retained
by the Litigation Trust as the Retained Amount.

    "Payment Trust" has the meaning set forth in the recitals hereof.

                                      B-4
<PAGE>
    "Payment Trust Declaration" means this Amended and Restated Declaration of
Trust, dated February   , 2001 relating to the Payment Trust.

    "Payment Trust Purpose" shall have the meaning set forth in Section 2.03.

    "Payment Trust Trustees" means the trustees of the Payment Trust.

    "Permitted Investment" means [________] or, if at the time of the receipt of
the applicable payment of the Commitment Amount by the Litigation Trust
(i) such fund is not in existence, (ii) such fund is no longer limited to
investing in short-term obligations of or guaranteed by the United States
government, (iii) such fund is not accepting new investors or new investments or
will not accept the investment of the Commitment Amount or the Retained Amount,
as the case may be, or (iv) such fund is not AAA rated by Standard and Poor's,
the [________].

    "Person" means a legal person, including any individual, corporation,
estate, partnership, joint venture, association, joint stock company, limited
liability company, trust, unincorporated association, or government or any
agency or political subdivision thereof, or any other entity of whatever nature.

    "Plan of Reorganization" has the meaning set forth in the recitals hereof.

    "Proceeds Amount" has the meaning set forth in the Commitment.

    "Recovery Agreement" means the Recovery Agreement dated July 24, 1996, by
and among the Sponsor, Bank United and Hyperion (as it may be hereafter amended
from time to time, the "Recovery Agreement").

    "Reference Rate" means the reference rate or an equivalent rate publicly
announced from time to time of____________or any successor (or, if no successor
remains in existence or publicly announces a rate, the commercial bank with the
largest amount of deposits in the State of New York as of the most recent year
end prior to the applicable date for which information is publicly available and
which publicly announces such a rate, as determined in good faith by the
Sponsor), as in effect from time to time.

    "Reimbursements" has the meaning set forth in the Commitment.

    "Relevant Trustee" has the meaning set forth in Section 3.05.

    "Replacement Options" has the meaning set forth in the Merger Agreement.

    "Responsible Officer" means, with respect to the Institutional Trustee, any
officer within the Corporate Trust Office of the Institutional Trustee,
including any managing director, vice-president, any assistant vice-president,
any assistant secretary, the treasurer, any assistant treasurer or other officer
of the Corporate Trust Office of the Institutional Trustee customarily
performing functions similar to those performed by any of the above designated
officers and also means, with respect to a particular corporate trust matter,
any other officer to whom such matter is referred because of that officer's
knowledge of and familiarity with the particular subject.

    "Retained Amount" has the meaning set forth in Section 5.03(a) of the
Litigation Trust Declaration.

    "Retained Amount Period" has the meaning set forth in Section 5.03(a) of the
Litigation Trust Declaration.

    "Securities Act" means the Securities Act of 1933, as amended from time to
time, or any successor legislation.

    "Sponsor" has the meaning set forth in the first paragraph of this
Agreement.

    "Successor Delaware Trustee" has the meaning set forth in Section 3.05(b).

                                      B-5
<PAGE>
    "Successor Entity" has the meaning set forth in Section 2.05(b)(i).

    "Successor Institutional Trustee" has the meaning set forth in
Section 3.05(b).

    "Trustee" or "Trustees" means each Person who has signed this Declaration as
a Trustee, so long as such Person shall continue in office in accordance with
the terms hereof, and all other Persons who may from time to time be duly
appointed, qualified and serving as Institutional Trustee, Delaware Trustee or
Litigation Trustee in accordance with the provisions hereof, and references
herein to a Trustee or the Trustees shall refer to such Person or Persons solely
in their capacity as Trustees hereunder.

    "Washington Mutual" has the meaning set forth in the recitals hereof.

                                  ARTICLE II.
                                  ORGANIZATION

    Section 2.01  NAME.  The Payment Trust shall continue to be named "Bank
United Litigation Payment Trust", as such name may be modified from time to time
by the Litigation Trustees following written notice to the Holder. The Payment
Trust's activities may be conducted under the name of the Payment Trust or any
other name deemed advisable by the Litigation Trustees.

    Section 2.02  OFFICE.  The address of the principal office of the Payment
Trust on the date of execution of this Declaration is:

    c/o Bank United Corp.
    3200 Southwest Freeway
    Houston, Texas 77027

    Attention: Jonathan K. Heffron

    Facsimile: 713-543-7744

    On ten Business Days written notice to the Holder, the Litigation Trustees
may designate another principal office.

    Section 2.03  PURPOSES AND POWERS OF THE PAYMENT TRUST.

    (a) The exclusive purposes and functions of the Payment Trust (each, a
"Payment Trust Purpose") are holding and distributing the Proceeds Amount to the
Litigation Trust or its successor. Anything to the contrary herein or in the
Business Trust Act notwithstanding, the Trustees shall not at any time, on
behalf of the Payment Trust or the Holder, enter into or engage in any
profit-making trade or business, and the Trustees shall have no powers to take,
and shall not take, any actions hereunder other than such as are reasonably
necessary and incidental to the achievement of the foregoing exclusive Payment
Trust Purposes.

    (b) Notwithstanding anything in this Declaration or in any Default Rule of
the Business Trust Act to the contrary, no Trustee shall have any power to
(i) modify the terms of the Commitment unless a breach of the Sponsor has
occurred thereunder or is reasonably foreseeable, (ii) invest money held by the
Payment Trust except amounts held, pursuant to Sections 3.12(a)(ii)(B), pending
their use to pay expenses or make distributions, or (iii) admit as a beneficial
owner any Person other than the Holder.

    (c) In order to raise funds for, or meet its obligation to pay, expenses
reasonably necessary to preserve or protect assets of the Payment Trust or to
administer the Payment Trust (including, without limitation, expenses related to
the Litigation and expenses related to the liability and indemnification

                                      B-6
<PAGE>
obligations of the Payment Trust), and solely in furtherance of Payment Trust
Purposes, the Litigation Trustees on behalf of the Payment Trust may undertake
the following:

        (i) enter into, subject to the limitations set forth in
    Section 6.02(a), customary fee arrangements (including fees contingent on
    receipt by the Payment Trust of, and determined by reference to, all or any
    portion of the Commitment Amount) with counsel for the Litigation, to the
    Payment Trust or to the Litigation Trustees, experts or consultants, which
    arrangements provide for such counsel, experts or consultants to receive
    amounts that represent for federal income tax purposes arms-length
    compensation for services when paid in cash by the Payment Trust; and

        (ii)[    incur indebtedness that represents debt of the Payment Trust
    (and not an ownership interest) for federal income tax purposes.]

    Section 2.04  TITLE TO PROPERTY OF THE PAYMENT TRUST.  Legal title to all
assets of the Payment Trust shall be vested in the Payment Trust. The Holder
shall not have legal title to any part of the assets of the Payment Trust, but
shall have the sole undivided beneficial interest in the assets of the Payment
Trust.

    Section 2.05  MERGERS.

    (a) The Payment Trust may not consolidate, amalgamate, merge with or into,
or be replaced by, or convey, transfer or lease its properties and assets
substantially as an entirety to any corporation or other body, except (i) as
described in paragraph (b) of this Section 2.05, or (ii) in a liquidation of the
Payment Trust in accordance with this Declaration.

    (b) The Payment Trust may, with the consent of the Institutional Trustee
(acting in reliance on the opinions delivered pursuant to this Section 2.05) and
a majority of the Litigation Trustees and without the consent of the Delaware
Trustee or the Litigation Trust Holders, consolidate, amalgamate, merge with or
into, or be replaced by a trust organized as such under the laws of any state of
the United States; provided that:

        (i) if the Payment Trust is not the survivor, such successor entity (the
    "Successor Entity") expressly assumes all of the obligations of the Payment
    Trust hereunder;

        (ii) such merger, consolidation, amalgamation or replacement does not
    result in any material alteration of the property of the Payment Trust or
    the Litigation Trust Property or adversely affect the rights, preferences
    and privileges of the Holder or the Litigation Trust Holders in any material
    respect (other than with respect to any dilution of the Holder's interests
    in the Successor Entity);

        (iii) such Successor Entity has purposes that are substantially
    identical to the Payment Trust Purposes;

        (iv) prior to such merger, consolidation, amalgamation or replacement,
    the Payment Trust has received an opinion of nationally recognized outside
    counsel to the Payment Trust experienced in such matters to the effect that:

           (a) such merger, consolidation, amalgamation or replacement does not
       adversely affect the rights, preferences and privileges of the Holder or
       the Litigation Trust Holders in any material respect;

        (b) such merger, consolidation, amalgamation or replacement, will not
    cause the Payment Trust or the Litigation Trust (or the Successor Entity) to
    fail to be classified as a grantor trust for United States federal income
    tax purposes; PROVIDED, HOWEVER, that the Payment Trust shall not be
    required to receive the opinion set forth in clause (b) if the Holder and a
    majority of the Litigation Trust Holders outstanding shall have approved
    such merger, consolidation, amalgamation or replacement;

                                      B-7
<PAGE>
        (v) without the unanimous consent of the Litigation Trustees, such
    merger, consolidation, amalgamation or replacement shall not result in any
    material change to the rights of the Litigation Trustees, including, without
    limitation, their rights to indemnification, exculpation and compensation
    set forth in this Declaration and under Delaware law; and

        (vi) prior to such merger, consolidation, amalgamation or replacement
    the Institutional Trustee shall have received an opinion of counsel to the
    effect that all conditions precedent of this paragraph (b) to such
    transaction have been satisfied.

    (c) Pursuant to Section 3815(f) of the Business Trust Act, in the case of a
consolidation, amalgamation, or merger of the Payment Trust with or into, or the
replacement by, a trust organized as such under the laws of any state of the
United States, subject to the requirements described in Section 2.5(b) above,
the agreement of merger or consolidation may effect any amendment to this
Declaration, or effect the adoption of a new governing instrument of the Payment
Trust if it is the surviving or resulting business trust in the merger or
consolidation. Such amendment or new governing instrument shall be effective at
the effective time or date of the merger or consolidation.

    Section 2.06  NATURE OF OBLIGATIONS.  The Litigation Trust shall not have
any preferred claim on, nor any beneficial ownership interest in, any of the
assets of the Trust before the Proceeds Amount is paid to the Litigation Trust
pursuant to the terms of this Declaration, the Litigation Trust Declaration and
the Commitment Agreement, and all rights created under such documents shall be
unsecured contractual rights of the Litigation Trust against the Payment Trust
and the Bank United Group. The assets of the Trust shall at all times be subject
to the claims of the general creditors of the Sponsor in the event of any
bankruptcy or insolvency proceeding involving Bank United Corp. or Washington
Mutual, Inc., as its successor.

                                  ARTICLE III.
                                    TRUSTEES

    Section 3.01  AUTHORITY.  Except as specifically provided in this
Declaration, the Institutional Trustee and the Litigation Trustees shall have
exclusive and complete authority to carry out the Payment Trust Purposes. An
action taken by a Trustee in accordance with its powers shall constitute the act
of and serve to bind the Payment Trust, it being understood that except as
provided expressly herein the Litigation Trustees may act only upon the vote or
consent (such consent to be evidenced by a writing executed contemporaneously
with or promptly following any oral consent) of a majority of the Litigation
Trustees. In dealing with the Trustees acting on behalf of the Payment Trust, no
Person shall be required to inquire into the authority of the Trustees to bind
the Payment Trust. Persons dealing with the Payment Trust are entitled to rely
conclusively on the power and authority of the Trustees as set forth in this
Declaration.

    Section 3.02  NUMBER OF TRUSTEES.  There shall be one Delaware Trustee if
required by Section 3.03; the Institutional Trustee may also serve as Delaware
Trustee if it meets the applicable requirements, in which case Section 3.03
shall have no application to such entity in its capacity as Institutional
Trustee. There shall be one Institutional Trustee as required by Section 3.04.
There shall be two initial Litigation Trustees, subject to change as provided in
Section 3.07.

    Section 3.03  DELAWARE TRUSTEE.

    (a) If required by the Business Trust Act, one Trustee (the "Delaware
Trustee") shall be:

        (i) a natural person who is a resident of the State of Delaware; or

        (ii) if not a natural person, an entity which has its principal place of
    business in the State of Delaware, and otherwise meets the requirements of
    applicable law, including Section 3807 of the Business Trust Act.

                                      B-8
<PAGE>
    (b) The Delaware Trustee shall be either a natural person who is at least
21 years of age or a legal entity that shall act through one or more Authorized
Officers.

    (c) The initial Delaware Trustee shall be First Union Trust Company,
National Association.

    (d) Notwithstanding any other provision of this Declaration, the Delaware
Trustee shall not be entitled to exercise any powers, nor shall the Delaware
Trustee have any of the duties and responsibilities of any of the Trustees
described in this Declaration. Except as set forth in this Section 3.03, the
Delaware Trustee shall be a Trustee for the sole and limited purpose of
fulfilling the requirements of Section 3807 of the Business Trust Act.

    Section 3.04  INSTITUTIONAL TRUSTEE; ELIGIBILITY.

    (a) There shall at all times be one Trustee which shall act as Institutional
Trustee, which Trustee shall:

        (i) not be an Affiliate of the Sponsor;

        (ii) not offer or provide credit or credit enhancement to the Payment
    Trust; and

        (iii) be a corporation or banking association organized and doing
    business under the laws of the United States of America or any State or
    Territory thereof or of the District of Columbia, authorized under such laws
    to exercise corporate trust powers, having a combined capital and surplus of
    at least 50 million U.S. dollars ($50,000,000), and subject to supervision
    or examination by federal, state, territorial or District of Columbia
    authority. If such corporation or banking association publishes reports of
    condition at least annually, pursuant to law or to the requirements of the
    supervising or examining authority referred to above, then for the purposes
    of this Section 3.04(a)(iii), the combined capital and surplus of such
    corporation or banking association shall be deemed to be its combined
    capital and surplus as set forth in its most recent report of condition so
    published.

    (b) If at any time the Institutional Trustee shall cease to be eligible to
so act under Section 3.04(a), the Institutional Trustee shall immediately resign
in the manner and with the effect set forth in Section 3.05(a).

    (c) The initial Institutional Trustee shall be First Union Trust Company,
National Association.

    (d) The Institutional Trustee shall continue to serve as a Trustee until
either:

        (i) the Payment Trust has been completely liquidated and all amounts
    received or receivable or potentially receivable pursuant to the Commitment
    and not otherwise applied as provided herein and any other amounts shall
    have been distributed to the Holder; or

        (ii) a Successor Institutional Trustee has been appointed and has
    accepted that appointment in accordance with Section 3.05.

    Section 3.05  APPOINTMENT, REMOVAL AND RESIGNATION OF THE INSTITUTIONAL AND
DELAWARE TRUSTEES.

    (a) No resignation or removal of the Institutional or Delaware Trustee (each
a "Relevant Trustee") and no appointment of a successor Trustee pursuant to this
Article shall become effective until the acceptance of appointment by the
successor Trustee in accordance with the applicable requirements of this
Section 3.05.

    (b) Subject to the immediately preceding paragraph, a Relevant Trustee may
resign at any time by giving written notice thereof to the Litigation Trustees
and the Holder. Upon the resignation of the Relevant Trustee, the Litigation
Trustees shall appoint a successor (the "Successor Institutional Trustee" or the
"Successor Delaware Trustee," as applicable) who shall execute an instrument of
acceptance as described in Section 3.05(e) below. If the instrument of
acceptance by the successor Relevant Trustee

                                      B-9
<PAGE>
required by this Section 3.05 shall not have been delivered to the Relevant
Trustee within 60 days after the giving of such notice of resignation, the
Relevant Trustee may petition, at the expense of the Payment Trust, any court of
competent jurisdiction for the appointment of a successor Relevant Trustee. Such
court may thereupon, after prescribing such notice, if any, as it may deem
proper, appoint a Relevant Trustee. The resigning Relevant Trustee shall have no
liability for the selection of such successor pursuant to this Section 3.05.

    (c) The Institutional Trustee or the Delaware Trustee, or both of them, may
be removed with or without cause by (i) the Litigation Trustees or (ii) the
Holder, in each case by delivery of notification of removal to the Relevant
Trustee. A Delaware Trustee who is a natural person may also be removed by the
Litigation Trustees if such Delaware Trustee becomes incompetent or
incapacitated, and shall be deemed removed if such Delaware Trustee dies. If a
Relevant Trustee shall be so removed, the Litigation Trustees shall promptly
appoint a successor Relevant Trustee or Trustees, and such successor Trustee or
Trustees shall comply with the applicable requirements of Section 3.03 or
Section 3.04, as the case may be. If no successor Relevant Trustee shall have
been so appointed by the Litigation Trustees and accepted appointment in the
manner required by this Section 3.05, within 30 days after delivery of
notification of removal or after the Payment Trust receives notice of the
Delaware Trustee's death, incompetence or incapacity, the Holder may appoint a
successor Relevant Trustee, and such successor Trustee or Trustees shall comply
with the applicable requirements of Section 3.03 or Section 3.04, as the case
may be.

    (d) The Institutional Trustee shall give notice of each appointment of a
successor Relevant Trustee to the Holder. Each notice shall include the name of
the successor Relevant Trustee and the address of its Corporate Trust Office if
it is the Institutional Trustee.

    (e) In the case of the appointment hereunder of a successor Relevant
Trustee, the retiring Relevant Trustee (except in the case of the death,
incompetence or incapacity of a Delaware Trustee who is a natural person) and
each successor Relevant Trustee shall execute and deliver an amendment hereto
wherein each successor Relevant Trustee shall accept such appointment and which
shall contain such provisions as shall be necessary or desirable to transfer and
confirm to, and to vest in, each successor Relevant Trustee all the rights,
powers, and duties of the retiring Relevant Trustee with respect to the Payment
Trust; it being understood that nothing herein or in such amendment shall
designate such Relevant Trustees as co-Trustees and upon the execution and
delivery of such amendment the resignation or removal of the retiring Relevant
Trustee shall become effective to the extent provided therein and each such
successor Relevant Trustee, without any further act, deed or conveyance, shall
become vested with all the rights, powers, and duties of the retiring Relevant
Trustee; but, on request of the Payment Trust or any successor Relevant Trustee,
such retiring Relevant Trustee shall duly assign, transfer and deliver to such
successor Relevant Trustee all property of the Payment Trust, all proceeds
thereof and money held by such retiring Relevant Trustee hereunder with respect
to the Payment Trust.

    (f) No Institutional Trustee or Delaware Trustee shall be liable for the
acts or omissions to act of any Successor Institutional Trustee or Successor
Delaware Trustee, as the case may be.

    (g) Any Person into which the Institutional Trustee or the Delaware Trustee,
as the case may be, may be merged or converted or with which either may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which the Institutional Trustee or the Delaware Trustee, as the
case may be, shall be a party, or any Person succeeding to all or substantially
all the corporate trust business of the Institutional Trustee or the Delaware
Trustee, as the case may be, shall be the successor of the Institutional Trustee
or the Delaware Trustee, as the case may be, hereunder, without the execution or
filing of any paper or any further act on the part of any of the parties hereto;
PROVIDED that such Person shall be otherwise qualified and eligible under this
Article.

                                      B-10
<PAGE>
    Section 3.06  VACANCIES AMONG RELEVANT TRUSTEES; EFFECT OF VACANCIES.

    (a) The death, resignation, retirement, removal, bankruptcy, dissolution,
liquidation, incompetence or incapacity to perform the duties of a Trustee shall
not operate to dissolve, terminate or annul the Payment Trust. Whenever a
vacancy in the Institutional Trustee or the Delaware Trustee shall occur, until
such vacancy is filled by the appointment of a Trustee in accordance with
Section 3.05, the Institutional Trustee or the Delaware Trustee (as the case may
be) remaining in office shall have all the powers granted to both the
Institutional Trustee and the Delaware Trustee and shall discharge all the
duties imposed upon both the Institutional Trustee and the Delaware Trustee by
this Declaration.

    Section 3.07  THE LITIGATION TRUSTEES.

    (a) There shall be at all times no fewer than two Trustees (the "Litigation
Trustees") who shall be natural persons over the age of 21 years and who shall
have the powers, duties and responsibilities of the Litigation Trustees
hereunder. The initial Litigation Trustees shall be Jonathan K. Heffron and
Salvatore A. Ranieri.

    (b) Upon appointment of a successor Litigation Trustee by the remaining
Litigation Trustees pursuant to Section 3.10, such successor Litigation Trustee
shall receive fees as determined by the other Litigation Trustees (but in no
event more than the fees payable to an initial Litigation Trustee).

    Section 3.08  LIMITATION ON LIABILITY OF LITIGATION TRUSTEES.  As set forth
in Section 11.02(a), the Litigation Trustees will have no liability to any
Indemnified Person or any member of the Bank United Group unless it shall be
established in a final and nonappealable judicial determination by clear and
convincing evidence that any decision or action of the Litigation Trustees was
undertaken with deliberate intent to injure the Holder or with reckless
disregard for the best interests of the Holder, and, in each such event, any
liability will be limited to actual, proximate, and quantifiable damages.

    Section 3.09  RESIGNATION OF A LITIGATION TRUSTEE.  Any Litigation Trustee
may resign as such by executing an instrument in writing and delivering that
instrument to the remaining Litigation Trustee or Trustees, if any, and to the
Institutional Trustee. In the event of the resignation of a Litigation Trustee,
such Litigation Trustee shall promptly: (a) execute and deliver such documents,
instruments and other writings as may be reasonably requested by the remaining
Litigation Trustees or Litigation Trustee, or if there is no Litigation Trustee,
the Institutional Trustee, to effect the termination of such Litigation
Trustee's capacity under this Declaration; (b) deliver to the remaining
Litigation Trustees or Litigation Trustee all assets, documents, instruments,
records and other writings related to the Payment Trust as may be in the
possession of such Trustee; and (c) otherwise assist and cooperate in effecting
the assumption of such Litigation Trustee's obligations and functions by his
successor Litigation Trustee.

    Section 3.10  APPOINTMENT OF SUCCESSOR LITIGATION TRUSTEES.

    (a) Upon the death, resignation or incompetency (determined by a court of
competent jurisdiction) of a Litigation Trustee, the remaining Litigation
Trustee or Litigation Trustees, and no other Person, shall have the power to
appoint a successor Litigation Trustee or Trustees, as applicable. In the event
of the death, resignation or incompetency (as determined by a court of competent
jurisdiction) of all of the Litigation Trustees so that there are no remaining
Litigation Trustees, two Litigation Trustees shall be appointed by the written
decision of a majority of the members of the Bank United Litigation Committee,
or, if such committee is not in existence, a majority of the Persons still
living who constituted the Board of Directors of the Sponsor immediately prior
to the Effective Time.

    Such appointment shall specify the date on which such appointment shall be
effective. Every successor Litigation Trustee appointed hereunder shall execute,
acknowledge and deliver to the remaining Litigation Trustees (or, in the event
there are no remaining Litigation Trustees, the Bank United Litigation Committee
or, if such committee is not in existence, the persons who were members of the
Board of Directors of the Sponsor immediately prior to the Effective Time) and
to the

                                      B-11
<PAGE>
Institutional Trustee an instrument accepting such appointment, and thereupon
such successor Litigation Trustee, without any further act, deed or conveyance,
shall become vested with all the rights, powers, and duties of a Litigation
Trustee. No successor Litigation Trustee shall have any duty to investigate the
administration of the Payment Trust or the management of the Litigation for any
period prior to the effective date of such successor Litigation Trustee's
appointment, and no resigning Litigation Trustee shall be required or permitted,
prior to final termination of the Litigation (including any proceedings to
collect any recovery due the Litigation Trustees), to file any accounting
proceeding.

    (b) The Holder will have no right to vote to appoint, remove or replace the
Litigation Trustees, which rights are vested exclusively in the Litigation
Trustees, the Bank United Litigation Committee or, if such committee is not in
existence, the persons who were members of the Board of Directors of the Sponsor
immediately prior to the Effective Time, as applicable.

    Section 3.11  MEETINGS OF THE TRUSTEES.

    (a) Meetings of the Delaware Trustee, the Institutional Trustee and the
Litigation Trustees together may be held from time to time upon the call of the
Delaware Trustee, Institutional Trustee or any Litigation Trustee. Notice of any
in-person meetings of the Trustees shall be hand delivered or otherwise
delivered in writing (including by facsimile, with a hard copy by overnight
mail) not less than five Business Days before such meeting. Notice of any
telephonic meetings of such Trustees shall be hand delivered or otherwise
delivered in writing (including by facsimile, with a hard copy by overnight
mail) not less than two Business Days before a meeting. Notices shall contain a
brief statement of the time, place and anticipated purposes of the meeting. The
presence (whether in person or by telephone) of a Trustee at a meeting shall
constitute a waiver of notice of such meeting except where such Trustee attends
a meeting for the express purpose of objecting to the transaction of any
activity on the ground that the meeting has not been lawfully called or
convened. Any Trustee may also waive such notice of in-person or telephonic
meetings in writing by hand delivering or otherwise delivering (including by
facsimile, with a hard copy by overnight mail) such written waiver to all other
Trustees. Unless provided otherwise in this Declaration, any action to be taken
by the Institutional Trustee together with the Litigation Trustees shall be
taken with the approval of the Institutional Trustee and each Litigation Trustee
(PROVIDED, that if there shall be more than two Litigation Trustees, a majority
of the Litigation Trustees voting in favor of an action shall constitute
approval by the Litigation Trustees unless otherwise provided in this
Declaration).

    (b) The Litigation Trustees may adopt their own rules and procedures but,
unless otherwise provided by this Declaration, may act only with the unanimous
agreement of the two Litigation Trustees or the agreement of the sole remaining
Litigation Trustee prior to the appointment of a successor Litigation Trustee
pursuant to Section 3.10. The Litigation Trustees may, in their discretion,
delegate to one or more of the Litigation Trustees the authority to act on
behalf of the Litigation Trustees as the Litigation Trustees may determine
appropriate (other than with respect to the retention or dismissal of counsel
for the Sponsor or Bank United (or any successor thereto) or the Litigation
Trustees, or the approval of a settlement or dismissal of the Litigation).
Following the date hereof and prior to the effective time of the Merger, the
initial Litigation Trustees and the Board of Directors of Bank United Corp., in
their sole discretion, may establish a committee comprised of present or former
members of the Board of Directors of Bank United Corp., or such other persons as
may be appointed by such Board, to assist and advise the Litigation Trustees in
connection with the Litigation (the "Bank United Litigation Committee").

    Section 3.12  POWERS AND DUTIES OF SPONSOR, LITIGATION TRUSTEES AND
INSTITUTIONAL TRUSTEE.

    (a) The Sponsor prior to the Effective Time, and the Institutional Trustee
and the Litigation Trustees, shall have the authority, subject to any
limitations set forth in Section 2.03, to conduct the affairs of the Payment
Trust in accordance with the terms of this Declaration and the Recovery
Agreement.

                                      B-12
<PAGE>
    (b) In addition, prior to the Effective Time, the Sponsor shall have the
authority to take the actions enumerated in (i) below on behalf of the Payment
Trust and, in connection therewith, to enter into all transactions and
agreements determined by the Sponsor to be appropriate in exercising such
authority and to perform all acts in furtherance thereof:

        (i) The Sponsor shall have the power and authority prior to the
    Effective Time and is hereby authorized to act on behalf of the Payment
    Trust prior to the Effective Time with respect to the execution and filing
    of a registration statement under the Securities Act describing, among other
    things, the Payment Trust and prospectuses (including any amendments or
    supplements thereto) and the preparation and filing of all documents filed
    therewith.

        (ii) The Trustees on behalf of the Payment Trust hereby (a) ratify and
    approve all actions taken by the Sponsor on behalf of the Payment Trust or
    for its benefit prior to the Effective Time and all transactions and
    agreements entered into in connection therewith; and (b) agree and
    acknowledge that the Sponsor shall have no liability to the Payment Trust,
    the Trustees or the Holder for any such actions, transactions or agreements
    and that the Payment Trust, the Trustees and the Holder shall no right to
    enforce, institute or maintain a suit, action or proceeding against the
    Sponsor, its successors or their respective affiliates, officers, directors,
    employees or agents relating to such actions, transactions or agreements; it
    being understood that this Section 3.12(a)(ii) does not constitute a waiver
    by the Litigation Trustees of their rights under Section 7.8 of the Merger
    Agreement or a waiver by the Trustees or the Payment Trust of their rights
    under the Commitment.

    (c) in accordance with subparagraphs (i) and (ii) of this Section 3.12(b),
the Institutional Trustee and the Litigation Trustees shall have the authority
to enter into all transactions and agreements determined by such Trustees to be
appropriate in exercising the authority, express or implied, otherwise granted
to such Trustees under this Declaration, and to perform all acts in furtherance
thereof (and all such transactions or agreements entered into or acts performed
prior to the date hereof are hereby ratified and approved), including, without
limitation, the following:

        (i) The Litigation Trustees shall have the power and authority and are
    authorized to act on behalf of the Payment Trust with respect to the
    following matters and such other powers and authority as provided in the
    Litigation Trustee Agreements:

           (A) after the Effective Time, the execution and delivery on behalf of
       the Payment Trust, subject to Section 2.03(b), of any agreement with the
       Sponsor, and such other agreements as may, in the opinion of a majority
       of the Litigation Trustees, be necessary or desirable in connection with
       the Payment Trust Purposes;

           (B) after the Effective Time, the execution and filing of one or more
       registration statements and prospectuses (including any amendments or
       supplements thereto) relating to, among other things, the Payment Trust,
       and filing of all periodic and other reports and other documents pursuant
       to the foregoing;

           (C) the carrying out of any of the powers or obligations of the
       Payment Trust or of the Litigation Trustees under the Commitment;

           (D) the payment of all expenses of the Payment Trust (including,
       without limitation, expenses of the Litigation, compensation and expenses
       of the Trustees, liability insurance and indemnification obligations) out
       of the funds of the Payment Trust, including amounts received pursuant to
       the Commitment, and any other source (including, without limitation,
       funds raised pursuant to Section 2.03(c));

           (E) the sending of notices (other than notice of default), and other
       information to the Holder in accordance with this Declaration;

                                      B-13
<PAGE>
           (F) the taking of any action to cause the Payment Trust not to be
       deemed to be an Investment Company under the Investment Company Act;

           (G) the amendment of the Commitment subject to Section 2.03(b);

           (H) the bringing, defense, payment, collection, compromise, taking of
       legal action, or other adjustment of claims or demands of or against the
       Sponsor or its successors which arise out of or in connection with a
       breach by the Sponsor (or any successor thereto) of any of its
       obligations under the Commitment or, subject to the limitations set forth
       in Section 3.12(a)(ii), the Sponsor of any of its obligations hereunder;

           (I) the approval of all applicable tax returns and tax information to
       be filed by the Institutional Trustee with respect to the Payment Trust
       on behalf of the Payment Trust;

           (J) the compliance by the Payment Trust with the indemnification
       obligations of the Payment Trust; and

           (K) the taking of any other actions necessary or desirable to carry
       out any of the foregoing activities.

        (ii) The Institutional Trustee shall have the power, duty and authority
    and is hereby authorized to act on behalf of the Payment Trust with respect
    to the following matters:

           (A) the application for a taxpayer identification number;

           (B) the maintenance of the funds of the Payment Trust in a
       non-interest bearing demand deposit account at Bank United;

           (C) upon receipt of a Proceeds Amount, and at the written direction
       of the Litigation Trustees, the investment of the Proceeds Amount, until
       disbursed to the Holder pursuant to the terms of this Declaration, in a
       Permitted Investment which is not sold prior to the date the Payment
       Amount is to be disbursed to the Holder;

           (D) the distribution of any amounts owed to the Holder in accordance
       with the terms of this Declaration;

           (E) the sending of notices of a breach by the Sponsor of its
       obligations under the Commitment or a breach by the Sponsor of its
       obligations under this Declaration or default by the Payment Trust of its
       payment obligations pursuant to Article IV hereof;

           (F) to the extent provided in this Declaration, the winding up of the
       affairs of and liquidation of the Payment Trust and the execution and
       filing of the certificate of cancellation with the Secretary of State of
       the State of Delaware;

           (G) the due preparation and filing of all applicable tax returns and
       tax information reports that are required to be filed with respect to the
       Payment Trust on behalf of the Payment Trust, with the approval of the
       Litigation Trustees;

           (H) the taking of all actions that may be necessary or appropriate
       for the preservation and the continuation of the Payment Trust's valid
       existence, rights, franchises and privileges as a statutory business
       trust under the laws of the State of Delaware and of each other
       jurisdiction in which such existence is necessary to protect the limited
       liability of the Holder or to enable the Payment Trust to effect the
       Payment Trust Purposes;

           (I) the bringing, defense, payment, collection, compromise,
       arbitration, taking of legal action, or other adjustment of claims or
       demands of or against the Sponsor or its successors or the Payment Trust
       which arise out of or in connection with a breach by the Sponsor of any
       of its obligations under the Commitment, the Payment Trust of any of its
       obligations under

                                      B-14
<PAGE>
       the Commitment, or, subject to the limitations set forth in
       Section 3.12(a)(ii), by the Sponsor of any of its obligations hereunder;

           (J) the taking of any action incidental to the foregoing as the
       Institutional Trustee may from time to time determine to be necessary or
       advisable to give effect to the terms of this Declaration for the benefit
       of the Holder (without consideration of the effect of any such action on
       any particular Holder).

        (iii) The Institutional Trustee shall have the power and authority to
    act on behalf of the Payment Trust with respect to any of the duties,
    liabilities, powers or the authority of the Litigation Trustees set forth in
    Section 3.12(b)(i) herein but shall not have a duty to do any such act
    unless specifically requested to do so in writing by the Litigation
    Trustees, and shall then be fully protected in acting pursuant to such
    written request; and in the event of a conflict between the action of the
    Litigation Trustees and the action of the Institutional Trustee, the action
    of the Institutional Trustee shall prevail.

    (d) The Trustees are authorized and directed to conduct the affairs of the
Payment Trust and to operate the Payment Trust so that the Payment Trust will
not fail to be classified as a grantor trust for United States federal income
tax purposes. In this connection, the Trustees are authorized to take any
action, not inconsistent with applicable laws, the Certificate of Trust or this
Declaration, as amended from time to time, that the Institutional Trustee or the
Litigation Trustees, as the case may be, determines in their discretion to be
necessary or desirable for such purpose, even if such action adversely affects
the interests of the Holder.

    (e) The Litigation Trustees may consult with counsel (which counsel may be
counsel to the Payment Trust or counsel to any member of the Bank United Group),
outside consultants, advisors and other Persons as to matters the Litigation
Trustees reasonably believe are within such other Person's professional or
expert competence, and the advice of such Persons shall be full and complete
authorization and protection in respect of any action taken, suffered or omitted
by them hereunder in good faith reliance on such advise. All oral or written
communications between any such counsel on the one hand, and the Sponsor, Bank
United, the Payment Trust, any Trustee, any of their affiliates, or any
successor entity or any affiliate of any successor entity, on the other hand,
will be protected by the attorney-client privilege and/or the attorney work
product doctrine, and no such communication will result in the waiver of any
applicable claim of confidentiality or privilege.

    (f) Any Trustee may also be a Holder or an officer, director, employee or
Affiliate of a Holder, and will have all the rights of such a Holder to the same
extent as if such Trustee were not a Trustee.

    Section 3.13  CERTAIN DUTIES AND RESPONSIBILITIES OF THE TRUSTEES.

    (a) The Institutional Trustee, before the occurrence of any breach by the
Sponsor or the Payment Trust of any of their obligations under the Commitment or
a breach by the Sponsor after the Effective Time of any of its obligations under
this Declaration, and after the curing of any such breach by the Payment Trust
or the Sponsor, shall undertake to perform only such duties as are specifically
set forth in this Declaration and no implied covenants shall be read into this
Declaration against the Institutional Trustee. In case of a breach by either the
Sponsor or the Payment Trust of any of their obligations under the Commitment or
a breach by the Sponsor of its obligations hereunder after the Effective Time,
the Institutional Trustee shall exercise such of the rights and powers vested in
it by this Declaration and use the same degree of care and skill in their
exercise as a prudent person would exercise or use under the circumstances in
the conduct of his or her own affairs.

    (b) The duties and responsibilities of the Trustees shall be as provided by
this Declaration and the Business Trust Act. Notwithstanding the foregoing, no
provision of this Declaration shall require any Trustee to expend or risk such
Trustee's own funds or otherwise incur any financial liability in the
performance of any of such Trustee's duties hereunder, or in the exercise of any
of such Trustee's rights

                                      B-15
<PAGE>
or powers. Whether or not therein expressly so provided, every provision of this
Declaration relating to the conduct or affecting the liability of or affording
protection to the Trustees shall be subject to the provisions of this Article.
To the extent that, at law or in equity, a Trustee has duties and liabilities
relating to the Payment Trust or to the Holder, such Trustee shall not be liable
to the Payment Trust or to the Holder for such Trustee's good faith reliance on
the provisions of this Declaration. The provisions of this Declaration, to the
extent that they restrict the duties and liabilities of the Trustees otherwise
existing at law or in equity, are agreed by the Payment Trust and the Holder to
replace such other duties and liabilities of the Trustees.

    (c) No provision of this Declaration shall be construed to relieve any
Trustee from liability with respect to matters that are within the authority of
such Trustee under this Declaration for its own bad faith, its own grossly
negligent action, its own grossly negligent failure to act, or its own willful
misconduct, except that:

        (i) a Trustee shall not be liable for any error or judgment made in good
    faith by, in the case of any entity, an authorized officer of such Trustee,
    unless it shall be proved that such Trustee was negligent in ascertaining
    the pertinent facts;

        (ii) a Trustee shall not be liable with respect to any action taken or
    omitted to be taken by it in good faith in accordance with the direction of
    the Holder relating to the time, method and place of conducting any
    proceeding for any remedy available to the Institutional Trustee, or
    exercising any trust or power conferred upon the Institutional Trustee under
    this Declaration;

        (iii) the Institutional Trustee's sole duty with respect to the custody,
    safe-keeping and physical preservation of any amounts paid pursuant to the
    Commitment Agreement shall be to deal with such property in a similar manner
    as the Institutional Trustee deals with similar property for its own
    account, subject to the protections and limitations on liability afforded to
    the Institutional Trustee under this Declaration;

        (iv) the Institutional Trustee shall not be liable for any interest on
    any money received by it except as it may otherwise agree in writing with
    the Litigation Trustees; and money held by the Institutional Trustee need
    not be segregated from other funds held by it except in relation to the
    Proceeds Amount maintained by the Institutional Trustee pursuant to
    Section 3.12(b)(ii)(d) and except to the extent otherwise required by law.

    Section 3.14  CERTAIN RIGHTS OF THE INSTITUTIONAL TRUSTEE.  Subject to the
provisions of Section 3.13:

    (a) the Institutional Trustee may conclusively rely and shall fully be
protected in acting or refraining from acting in good faith upon any resolution,
opinion of counsel, certificate, written representation of the Holder,
transferee or Litigation Trustee, certificate of auditors or any other
certificate, statement, instrument, opinion, report, notice, request, direction,
consent, order, approval, CPR Certificate, bond, debenture, note, other evidence
of indebtedness or other paper or document believed by it to be genuine and to
have been signed, sent or presented by the proper party or parties;

    (b) if (i) in performing its duties under this Declaration, the
Institutional Trustee is required to decide between alternative courses of
action, or (ii) in construing any of the provisions of this Declaration, the
Institutional Trustee finds the same ambiguous or inconsistent with any other
provisions contained herein, or (iii) the Institutional Trustee is unsure of the
application of any provision of this Declaration, then, except as to any matter
as to which the Holder is entitled to vote under the terms of this Declaration,
the Institutional Trustee shall take such action, or refrain from taking such
action, as the Institutional Trustee in its sole discretion shall deem advisable
and in the best interests of the Holder, in which event the Institutional
Trustee shall have no liability except for its own bad faith, negligence or
willful misconduct;

    (c) any direction or act of the Litigation Trustees contemplated by this
Declaration shall be sufficiently evidenced by an Officers' Certificate;

                                      B-16
<PAGE>
    (d) the Institutional Trustee may consult with counsel (which counsel may be
counsel to the Litigation Trustees or appointed by the Sponsor or Bank United
(or any successor to such Persons) at the direction of the Litigation Trustees
to prosecute the Litigation) and the advice of such counsel shall be full and
complete authorization and protection in respect of any action taken, suffered
or omitted by it hereunder in good faith and in reliance thereon and in
accordance with such advice; the Institutional Trustee shall have the right at
any time to seek instructions concerning the administration of this Declaration
from any court of competent jurisdiction. All oral or written communications
between any such counsel on the one hand, and the Sponsor, Bank United, the
Payment Trust, any Trustee, any of their affiliates, or any successor entity or
any affiliate of any successor entity, on the other hand, will be protected by
the attorney-client privilege and/or the attorney work product doctrine, and no
such communication will result in the waiver of any applicable claim of
confidentiality or privilege.

    (e) the Institutional Trustee shall be under no obligation to exercise any
of the rights or powers vested in it by this Declaration at the request or
direction of the Holder pursuant to this Declaration, unless the Holder shall
have offered to the Institutional Trustee security or indemnity reasonably
satisfactory to it against the costs, expenses and liabilities which might be
incurred by it in compliance with such request or direction, provided that
nothing contained in this Section 3.14(e) shall be taken to relieve the
Institutional Trustee, upon breach by the Sponsor of any of its obligations
under the Commitment, or by the Sponsor or its successors after the Effective
Time of any of the obligations of the Sponsor hereunder, of its obligation to
exercise, upon the instructions of the Litigation Trustees, the rights and
powers vested in it by this Declaration;

    (f) the Institutional Trustee shall not be required to make any
investigation into the facts or matters stated in any resolution, certificate,
statement, instrument, opinion, report, notice, request, consent, order,
approval, CPR Certificate, bond, debenture, note or other evidence of
indebtedness or other paper or document, unless requested in writing to do so by
the Holder, but the Institutional Trustee may make such further inquiry or
investigation into such facts or matters as it may see fit;

    (g) except as otherwise expressly provided in this Declaration, the
Institutional Trustee shall not be under any obligation to take any action that
is discretionary under the provisions of this Declaration;

    (h) any action taken by the Institutional Trustee or its agents authorized
by this Declaration to be taken by the Institutional Trustee shall bind the
Payment Trust and the Holder, and the signature of the Institutional Trustee or
its agents alone shall be sufficient and effective to perform any such action
and no third party shall be required to inquire as to the authority of the
Institutional Trustee to so act or as to its compliance with any of the terms
and provisions of this Declaration, both of which shall be conclusively
evidenced by the Institutional Trustee's or its agent's taking such action;

    (i) no provision of this Declaration shall be deemed to impose any duty or
obligation on the Institutional Trustee to perform any act or acts or exercise
any right, power, duty or obligation conferred or imposed on it, in any
jurisdiction in which it shall be illegal, or in which the Institutional Trustee
shall be unqualified or incompetent in accordance with applicable law, to
perform any such act or acts, or to exercise any such right, power, duty or
obligation. No permissive power or authority available to the Institutional
Trustee shall be construed to be a duty;

    (j) whenever in the administration of the provisions of this Declaration the
Institutional Trustee shall deem it necessary or desirable that a matter be
proved or established prior to taking or suffering any action to be taken
hereunder, such matter (unless other evidence in respect thereof be herein
specifically prescribed) may, in the absence of gross negligence or bad faith on
the part of the Institutional Trustee, be deemed to be conclusively proved and
established by an Officer's Certificate delivered to the Institutional Trustee
and such certificate, in the absence of gross negligence or bad faith on the
part of the Institutional Trustee, shall be full warrant to the Institutional
Trustee for any action taken, suffered or omitted by it under the provisions of
this Declaration upon the faith thereof;

                                      B-17
<PAGE>
    (k) in no event shall the Institutional Trustee be liable for the selection
of investments for funds permitted to be invested hereunder or for investment
losses thereon, and the Institutional Trustee shall have no liability in respect
of losses incurred as a result of the liquidation of any investment prior to its
stated maturity or the failure of the Litigation Trustees to provide timely
written investment direction with respect to funds permitted to be invested
hereunder;

    (l) the Institutional Trustee may execute any of its powers hereunder or
perform any duties hereunder either directly or by or through agents, attorneys,
custodians or nominees appointed with due care, and shall not be responsible for
any willful misconduct or gross negligence on the part of, or for the
supervision of, any agent, attorney, custodian or nominee so appointed; and

    (m) the Institutional Trustee shall not be deemed to have notice of the
occurrence of the events described in Section 3.19 unless the Institutional
Trustee shall have received written notice of such event or a Responsible
Officer of the Institutional Trustee shall have obtained actual knowledge
thereof.

    Section 3.15  [Intentionally Left Blank].

    Section 3.16  EXECUTION OF DOCUMENTS.

    (a) Unless otherwise determined in writing by the Institutional Trustee, and
except as otherwise required by the Business Trust Act, the Institutional
Trustee, or any one or more of the Litigation Trustees, as the case may be, is
authorized to execute on behalf of the Payment Trust any documents that the
Institutional Trustee or the Litigation Trustees, as the case may be, have the
power and authority to execute pursuant to Section 3.12.

    (b) Any Institutional or Delaware Trustee may, by power of attorney
consistent with applicable law, delegate to any other natural person over the
age of 21 his or her or its power for the purpose of executing any documents
contemplated in Section 3.12.

    Section 3.17  NOT RESPONSIBLE FOR RECITALS.  The recitals contained in this
Declaration shall be taken as the statements of the Payment Trust, and the
Trustees do not assume any responsibility for their correctness. The Sponsor and
the Trustees make no representations as to the value or condition of the
property of the Payment Trust or any part thereof. Except as otherwise
specifically provided in Article XIV, the Sponsor and the Trustees make no
representations as to the validity or sufficiency of this Declaration.

    Section 3.18  [Intentionally Left Blank].

    Section 3.19  DEFAULT; NOTICE.  The Institutional Trustee shall, within
90 days after the occurrence of (i) a breach by the Sponsor of any of its
payment obligations under the Commitment, (ii) a breach by the Sponsor after the
Effective Time of its obligations hereunder, or (iii) a breach by the Payment
Trust of its obligations under the Commitment, transmit by mail, first class
postage prepaid, to the Holder, notice of such default actually known to a
Responsible Officer of the Institutional Trustee, unless such default has been
cured before the giving of such notice; PROVIDED, HOWEVER, the Institutional
Trustee shall be protected in withholding such notice if and so long as a
Responsible Officer of the Institutional Trustee in good faith determines that
the withholding of such notice is in the best interests of the Holder.

                                  ARTICLE IV.
                               PAYMENTS TO HOLDER

    Section 4.01  PAYMENT TO HOLDER.  From and after the expiration of the
366 day period starting on the date of initial distribution of the CPR
Certificates to the Bank United Corp. stockholders in the Reorganization, the
Institutional Trustee shall, in accordance with Section 4.02, pay any Proceeds
Amount to the Holder.

                                      B-18
<PAGE>
    Section 4.02  TIMING OF PAYMENTS.  The Institutional Trustee on behalf of
the Payment Trust will make payments of amounts as contemplated by Section 4.01
to the Holder as of record dates determined by the Litigation Trustees. Payment
will be made on payment dates, which will also be set by the Litigation
Trustees. The Litigation Trustees shall promptly notify the Institutional
Trustee in writing of any such dates.

    Section 4.03  DEFAULT; WAIVER.  The Holders of a majority of the CPR
Certificates then outstanding may, by vote or consent, on behalf of the Holder,
waive any breach by the Sponsor of any of its obligations under the Commitment,
or any failure by the Payment Trust to fulfill its obligations under the
Commitment and with respect to the Holder.

                                   ARTICLE V.
                                    EXPENSES

    Section 5.01  EXPENSES.  The Litigation Trustees on behalf of the Payment
Trust shall have the right to draw on the funds of the Payment Trust for the
purpose of funding any expenses of the Payment Trust, including administration
expenses, compensation, fees and expenses of the Trustees, amounts paid as
indemnity to any Indemnified Person and premiums for insurance for the
Litigation Trustees.

    Section 5.02  RETURN OF FUNDS.  Pursuant to Section 2.08 of the Commitment,
immediately prior to its termination, the Payment Trust shall return to the
Sponsor any amounts provided to the Payment Trust pursuant to Section 2.04 of
the Commitment Agreement but not used by the Payment Trust, less a reasonable
reserve of funds to pay for termination expenses.

                                  ARTICLE VI.
                          [INTENTIONALLY LEFT BLANK].

                                  ARTICLE VII.
                      ISSUANCE OF THE BENEFICIAL INTEREST

    Section 7.01  THE BENEFICIAL INTEREST

    (a) The Payment Trust shall be authorized to issue one class of undivided
beneficial interest in the assets of the Payment Trust (the "Beneficial
Interest"), which may not be issued to more than one Person. Simultaneously with
the execution hereof, the Beneficial Interest shall be issued to the Sponsor.

    (b) Upon issuance of the Beneficial Interest as provided in this
Declaration, the Beneficial Interest so issued shall be deemed to be validly
issued, fully paid and non-assessable.

    (c) The Sponsor, by virtue of having become the Holder in accordance with
the terms of this Declaration, shall be deemed to have expressly assented and
agreed to the terms of, and shall be bound by, this Declaration.

                                 ARTICLE VIII.
                  DISSOLUTION AND TERMINATION OF PAYMENT TRUST

    Section 8.01  DISSOLUTION AND TERMINATION OF PAYMENT TRUST.

    (a) The Payment Trust shall dissolve:

        (i) 30 days after the date on which the Proceeds Amount has been paid in
    full to the Litigation Trust;

                                      B-19
<PAGE>
        (ii) 30 days after the date of a final dismissal of the Litigation or a
    determination by the Sponsor or Bank United (or any successor to such
    Persons) not to continue to prosecute the Litigation, in either case upon
    the instruction of the Litigation Trustees;

        (iii) if, prior to the Effective Time, the Sponsor so resolves in
    writing; provided that such dissolution is consummated before the issuance
    of any CPR Certificates pursuant to the Litigation Trust Declaration; or

        (iv) 30 days after the date that the Litigation Trust dissolves

    (b) As soon as is practicable after the occurrence of an event referred to
in Section 8.01(a), and after completion of winding up of the Payment Trust and
satisfaction of liabilities of the Payment Trust in accordance with the Business
Trust Act, the Trustees shall terminate the Payment Trust by filing a
certificate of cancellation with the Secretary of State of the State of
Delaware.

    (c) The provisions of Sections 3.08, 3.13, 11.04 and 11.06 shall survive the
termination of the Payment Trust.

                                  ARTICLE IX.
                             TRANSFER OF INTERESTS

    Section 9.01  GENERAL.  The Beneficial Interest shall not be transferable in
whole or in part.

                                   ARTICLE X.
                                   THE HOLDER

    Section 10.01  LIMITATIONS ON RIGHTS OF HOLDER.  The Holder acknowledges
that:

    (a) the Holder, in its capacity as the Holder, is not a stockholder of the
Sponsor, Bank United or any successor of either of them and will have no rights
to dividends, liquidation preferences or other distributions other than the
payments described in Article IV, and will have no voting rights except as
expressly described herein. The Commitment is solely a contractual obligation
among the Sponsor, the Litigation Trust and the Payment Trust;

    (b) nothing in this Declaration shall be construed to create any partnership
or joint venture between or among the Sponsor, Bank United, Washington Mutual or
any member of the Bank United Group, and the Holder;

    (c) (i) the Litigation is solely an asset of the Sponsor, Bank United,
Hyperion and their successors, (ii) the Litigation shall be conducted by and on
behalf of the Sponsor, Bank United and their successors solely in accordance
with the instructions of the Litigation Trustees pursuant to this Declaration,
(iii) the Litigation Trustees shall have the sole and exclusive right to direct
the Sponsor, Bank United and their successors to take (or not take) actions
relating to the Litigation as contemplated by this Declaration and the Recovery
Agreement and may, among other things, instruct the Sponsor, Bank United and
their successors to dismiss, settle or cease prosecuting the Litigation at any
time without obtaining any cash or other recovery, or upon obtaining any such
cash or other recovery as the Litigation Trustees may determine, (iv) the
Litigation Trustees have the sole and exclusive right to take or not take other
actions contemplated by this Declaration on behalf of the Sponsor, Bank United
and their successors relating to the Litigation (including, without limitation,
any decision with respect to the incurrence of expenses);

    (d) the liability of the Trustees and members of the Bank United Group is
limited to the extent set forth in Article XI.

                                      B-20
<PAGE>
    Section 10.02  LIMITATIONS ON SUITS BY HOLDER.

    (a) To the fullest extent permitted by law, the Holder shall not have any
right by virtue or by availing itself of any provision of this Declaration to
institute any action or proceeding other than a suit by such Holder for
nonpayment of amounts due and owing with respect to the Commitment, at law or in
equity or in bankruptcy or otherwise upon or under or with respect to this
Declaration, or for the appointment of a Trustee, receiver, liquidator,
custodian or other similar official or for any other remedy hereunder, unless
the Holder previously shall have given to the Institutional Trustee written
notice of default and of the continuance thereof as herein before provided, and
the Holder shall have made written request upon the Institutional Trustee to
institute such action or proceeding in its own name as Trustee hereunder and
shall have offered to the Institutional Trustee such reasonable indemnity as it
may require against the costs, expenses and liabilities to be incurred therein
or thereby and the Institutional Trustee for 60 days after its receipt of such
notice, request and offer of indemnity shall have failed to institute any such
action or proceeding; it being understood and intended, and being expressly
covenanted by the Holder with the Institutional Trustee, that the Holder shall
not have any right in any manner whatever by virtue of any provision of this
Declaration to effect, disturb or prejudice the rights of the Holder, or to
enforce any right under this Declaration, except in the manner herein provided.
For the protection and enforcement of the provisions of this Section, each of
the Holder and the Institutional Trustee shall be entitled to such relief as can
be given either at law or in equity.

    (b) Any proceeding by the Holder shall be instituted only in accordance with
the following procedure:

        (i) The Holder shall deliver to the Institutional Trustee (which shall
    promptly deliver a copy thereof to the Litigation Trustees) a printed or
    typewritten statement not more than 10 pages in length containing a
    description of the nature and grounds of the claims to be asserted and the
    relief or remedy sought.

                                  ARTICLE XI.
      LIMITATION OF LIABILITY OF HOLDERS OF SECURITIES, TRUSTEES OR OTHERS

    Section 11.01  LIABILITY.

    (a) Except as expressly set forth in this Declaration, the Trustees shall
not be:

        (i) personally liable for the payment of any amounts, which payment
    shall be made solely from the assets of the Payment Trust, if any; or

        (ii) required to pay to the Payment Trust or to any Holder any deficit
    upon dissolution of the Payment Trust or otherwise.

    (b) Pursuant to Section 3803(a) of the Business Trust Act, the Holder shall
be entitled to the same limitation of personal liability extended to
stockholders of private corporations for profit organized under the General
Corporation Law of the State of Delaware.

    Section 11.02  EXCULPATION.

    (a) To the fullest extent permitted by law, no Indemnified Person shall be
liable, responsible or accountable in damages or otherwise to the Payment Trust
or any Indemnified Person for any loss, damage or claim incurred by reason of
any act or omission performed or omitted by such Indemnified Person, except that
(i) the Litigation Trustees shall be liable for any such loss, damage or claim
incurred by reason of any act or omission performed or omitted by them if it
shall be established in a final and nonappealable judicial determination by
clear and convincing evidence that any such act or omission of the Litigation
Trustees was undertaken with deliberate intent to injure the Holder or with

                                      B-21
<PAGE>
reckless disregard for the best interests of such Holder and, in any event, any
liability will be limited to actual, proximate, quantifiable damages, and
(ii) the Institutional Trustee or the Delaware Trustee shall be liable for any
such loss, damage or claim incurred by reason of the Institutional Trustee's or
Delaware Trustee's (as the case may be) gross negligence or willful misconduct
with respect to such acts or omissions and, in any event, any liability will be
limited to actual, proximate, quantifiable damages; PROVIDED, that nothing in
this Section 11.02(a) is intended to limit the Litigation Trustees' right to
insurance obtained by the Payment Trust and the proceeds of such insurance.

    (b) To the fullest extent permitted by law, no Indemnified Person shall have
any liability to the Payment Trust, the Trustees or the Holder. Without limiting
the generality of the foregoing, to the fullest extent permitted by law, none of
the Holder (in its capacity as Holder), the Trustees or the Payment Trust shall
have the right to enforce, institute or maintain a suit, action or proceeding
against a Indemnified Person relating to the formation of the Payment Trust, the
entering into of the Commitment, the maintenance of the Litigation at the
direction of,or the actions of the Litigation Trustees in their capacity (or
purportedly in their capacity) as, Litigation Trustees. Notwithstanding the
preceding two sentences of this Section 11.02(b), the Payment Trust (or the
Litigation Trustees on behalf of the Payment Trust) may enforce, institute or
maintain a suit, action or proceeding against (i), except as set forth in
Section 3.12(a)(ii), the Sponsor for breach of its obligations hereunder,
(ii) the Sponsor for breach of any of its obligations under the Commitment or
this Declaration, or (iii) Bank United for breach of any depository relationship
obligations it may have with respect to payments made by the Sponsor to the
Payment Trust, and in each case, the Sponsor and Bank United or their
successors, as the case may be, may be liable to the Payment Trust in connection
with such suit, action or proceeding, or (v) Bank United for breach of its
obligations under the Commitment or this Declaration. Notwithstanding the
preceding two sentences, fees and expenses incurred by the Bank United Group in
such a suit, action or proceeding described in the preceding two sentences shall
not be set off against the Litigation Proceeds (in order to calculate the
Commitment Amount) if the Payment Trust or the Litigation Trustees prevail in
such a suit, and, if in connection with suits brought pursuant to clauses
(i) through (iv) inclusive, shall be deemed expenses of the Payment Trust
payable by the Payment Trust out of the Commitment Amount.

    (c) An Indemnified Person shall be fully protected in relying in good faith
upon the records of the Payment Trust and upon such information, opinions,
reports or statements presented to the Payment Trust by any Person as to matters
the Indemnified Person reasonably believes are within such other Person's
professional or expert competence and, if selected by such Indemnified Person,
has been selected by such Indemnified Person with reasonable care by or on
behalf of the Payment Trust, including information, opinions, reports or
statements as to the value and amount of the assets, liabilities, profits,
losses, or any other facts pertinent to the existence and amount of assets from
which payment to Holder might properly be paid.

    Section 11.03  FIDUCIARY DUTY.

    (a) To the extent that, at law or in equity, an Indemnified Person has
duties (including fiduciary duties) and liabilities relating thereto to the
Payment Trust or to any other Indemnified Person, an Indemnified Person acting
under this Declaration shall not be liable to the Payment Trust or to any other
Indemnified Person for its good faith reliance on the provisions of this
Declaration. The provisions of this Declaration, to the extent that they
restrict the duties and liabilities of an Indemnified Person otherwise existing
at law or in equity, are agreed by the parties hereto to replace such other
duties and liabilities of the Indemnified Person.

    (b) Whenever in this Declaration an Indemnified Person is permitted or
required to make a decision:

        (i) in its "discretion" or under a grant of similar authority, the
    Indemnified Person shall be entitled to consider such interests and factors
    as it desires, including its own interests, and shall

                                      B-22
<PAGE>
    have no duty or obligation to give any consideration to any interest of or
    factors affecting the Payment Trust or any other Person; or

        (ii) in its "good faith" or under another express standard, the
    Indemnified Person shall act under such express standard and shall not be
    subject to any other or different standard imposed by this Declaration or by
    applicable law.

    Section 11.04  INDEMNIFICATION.

    (a) The Payment Trust shall indemnify, to the fullest extent permitted by
law, any Indemnified Person in connection with any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative, arising out of or relating to the Payment Trust, the Litigation
or any acts or omissions of the Trustees in their capacity or purportedly in
their capacity as Trustees, or actions taken by the Litigation Trustees
(including actions taken by the Litigation Trustees in their capacity as
officers, directors or agents of the Sponsor or Washington Mutual so long as
such actions relate to the Payment Trust including, without limitation, the
negotiation of the terms of the Payment Trust and the approval of the
establishment of the Payment Trust and related transactions, but otherwise
excluding actions taken by the Litigation Trustees in such capacities), against
any and all losses, liabilities, damages, judgments, demands, suits, claims,
assessments, charges, fines, penalties and other costs and expenses, including
attorneys' fees and expenses and other fees and expenses associated with the
defense of a claim or incurred by such Indemnified Person in obtaining
indemnification under this Declaration, whether or not in a formal proceeding
(collectively, "Damages").

    (b) Notwithstanding Section 11.04(a), no indemnification shall apply (i) in
the case of the indemnification of the Litigation Trustees, if the Holder
establishes in a final and nonappealable judicial determination by clear and
convincing evidence that such Damages arose as the result of acts or omissions
of the Litigation Trustees with deliberate intent to injure the Holder or
(ii) in the case of the indemnification of the Delaware Trustee or the
Institutional Trustee, if the Holder establish in a final and nonappealable
judicial determination by clear and convincing evidence that such damages arose
because such Trustee was grossly negligent or engaged in willful misconduct. The
termination of any action, suit or proceeding by judgment, order, settlement,
conviction, or upon a plea of NOLO CONTENDERE or its equivalent, shall not, of
itself, create a presumption that (i) the Litigation Trustees acted or decided
with deliberate intent to injure the Holder or with reckless disregard for the
best interests of such Holder or (ii) the Delaware Trustee or Institutional
Trustee was grossly negligent or engaged in willful misconduct.

    (c) To the fullest extent permitted by law, expenses (including attorneys'
fees and expenses) incurred by an Indemnified Person in defending a civil,
criminal, administrative or investigative action, suit or proceeding referred to
in Sections 11.04(a) shall be paid by the Payment Trust in advance of the final
disposition of such action, suit or proceeding upon receipt of an undertaking
(without bond or security) by or on behalf of such Indemnified Person to repay
such amount if it shall ultimately be determined that he is not entitled to be
indemnified by the Payment Trust as authorized in this Section 11.04.

    (d) All rights to indemnification under this Section 11.04 shall be deemed
to be provided by a contract between the Payment Trust and each Indemnified
Person who serves in such capacity at any time while this Section 11.04 is in
effect. Any repeal or modification of this Section 11.04 shall not affect any
rights or obligations then existing.

    (e) The Payment Trust shall purchase and maintain insurance to cover its
indemnification obligations and any other liabilities of the Litigation
Trustees.

    (f) For purposes of this Section 11.04, references to "the Payment Trust"
shall include, in addition to the resulting or surviving entity, any constituent
entity (including any constituent of a constituent) absorbed in a consolidation
or merger involving the Payment Trust, so that any Person who is or was a

                                      B-23
<PAGE>
director, Trustee, officer or employee of such constituent entity, or is or was
serving at the request of such constituent entity as a director, Trustee,
officer, employee or agent of another entity, shall stand in the same position
under the provisions of this Section 11.04 with respect to the resulting or
surviving entity as he would have with respect to such constituent entity if its
separate existence had continued.

    (g) The indemnification and advancement of expenses provided by, or granted
pursuant to, this Section 11.04 shall continue as to a Person who has ceased to
be an Indemnified Person and shall inure to the benefit of the heirs, executors
and administrators of such a Person.

    Section 11.05  OUTSIDE BUSINESSES.  Any Indemnified Person or member of the
Bank United Group may engage in or possess an interest in other business
ventures of any nature or description, independently or with others, similar or
dissimilar to the business of the Payment Trust, and the Payment Trust and the
Holder shall have no rights by virtue of this Declaration in and to such
independent ventures or the income or profits derived therefrom, and the pursuit
of any such venture shall not be deemed wrongful or improper.

    Section 11.06  COMPENSATION; FEE.  The Trustees on behalf of the Payment
Trust agree:

    (a) to pay to the Institutional Trustee and the Delaware Trustee from time
to time, upon the approval of the Litigation Trustees, reasonable compensation
for all services rendered by them hereunder (which compensation shall not be
limited by any provision of law in regard to the compensation of a Trustee of an
express trust); and

    (b) except as otherwise expressly provided herein, to reimburse the Trustees
upon request for all expenses, disbursements and advances incurred or made by
the Trustees in accordance with any provision of this Declaration (including the
compensation and the expenses and disbursements of their respective agents and
counsel).

    The provisions of Section 11.04 and this Section 11.06 shall survive the
dissolution of the Payment Trust and the termination of this Declaration and the
removal or resignation of any Trustee.

                                  ARTICLE XII.
                                   ACCOUNTING

    Section 12.01  FISCAL YEAR.  The fiscal year ("Fiscal Year") of the Payment
Trust shall be the calendar year, or such other year as is required by the Code.

    Section 12.02  CERTAIN ACCOUNTING MATTERS.

    (a) At all times during the existence of the Payment Trust, the Litigation
Trustees shall keep, or cause to be kept, full books of account, records and
supporting documents, which shall reflect in reasonable detail each transaction
of the Payment Trust. The books of account shall be maintained on the accrual
method of accounting, in accordance with generally accepted accounting
principles, consistently applied. The books of account and the records of the
Payment Trust shall be examined by and reported upon as of the end of each
Fiscal Year of the Payment Trust by a firm of independent certified public
accountants selected by the Litigation Trustees.

    (b) The Litigation Trustees shall cause to be duly prepared and delivered to
each of the Holder any annual United States federal income tax information
statement required by the Code, containing such information with regard to the
Beneficial Interest held by the Holder as is required by the Code and the
regulations promulgated thereunder. Notwithstanding any right under the Code to
deliver any such statement at a later date, the Litigation Trustees shall
endeavor to deliver all such statements within 30 days after the end of each
Fiscal Year of the Payment Trust.

    (c) The Litigation Trustees shall cause to be duly prepared and filed an
annual United States federal income tax return on a Form 1041 or such other form
required by United States federal income

                                      B-24
<PAGE>
tax law, and any other annual income tax returns required to be filed by the
Litigation Trustees on behalf of the Payment Trust with any state or local
taxing authority.

    Section 12.03  BANKING.  The Payment Trust may maintain one or more bank
accounts in the name and for the sole benefit of the Payment Trust; PROVIDED,
HOWEVER, that all payments received by the Payment Trust pursuant to the
Commitment shall be maintained separately from other funds as provided by
Section 3.12(b)(ii)(D).

    Section 12.04  WITHHOLDING.  The Institutional Trustee or any Paying Agent
shall comply with all withholding requirements under United States federal,
state and local law. The Institutional Trustee or any Paying Agent shall
request, and the Holder shall provide to the Institutional Trustee or any Paying
Agent, such forms or certificates as are necessary to establish an exemption
from withholding with respect to the Holder, and any representations and forms
as shall reasonably be requested by the Institutional Trustee to assist it in
determining the extent of, and in fulfilling, its withholding obligations. The
Litigation Trustees shall file required forms with applicable jurisdictions and,
unless an exemption from withholding is properly established by the Holder,
shall remit amounts withheld with respect to the Holder to applicable
jurisdictions. To the extent that the Institutional Trustee or any Paying Agent
is required to withhold and pay over any amounts to any authority with respect
to distributions or allocations to the Holder, the amount withheld shall be
deemed to be a distribution in the amount of the withholding to the Holder. In
the event of any claimed overwithholding, the Holder shall be limited to an
action against the applicable jurisdiction. If the amount required to be
withheld was not withheld from actual distributions made, the Institutional
Trustee may reduce subsequent distributions by the amount of such withholding.

                                 ARTICLE XIII.
                            AMENDMENTS AND MEETINGS

    Section 13.01  AMENDMENTS.

    (a) Except as otherwise provided in this Declaration, this Declaration may
only be amended by a written instrument approved and executed by

        (i) the Institutional Trustee;

        (ii) the Litigation Trustees in accordance with the last sentence of
    Section 3.11(a); and

        (iii) if the amendment affects the rights, powers, duties, obligations
    or immunities of the Delaware Trustee, the Delaware Trustee.

    (b) Notwithstanding any other provision of this Article XIII, no amendment
shall be made, and any such purported amendment shall be void and ineffective
unless the Institutional Trustee shall have first received:

        (A) an Officers' Certificate from the Payment Trust that such amendment
    is permitted by, and conforms to, the terms of this Declaration; and

        (B) an opinion of counsel (who may be counsel to the Payment Trust or
    the Litigation Trustees) that such amendment is permitted by, and conforms
    to, the terms of this Declaration.

        (C) Except as provided in Section 13.01(b)(D), any such purported
    amendment shall be void and ineffective unless the Holder shall have
    consented to such amendment.

        (D) Subject to Section 13.01(b), this Declaration may be amended by the
    Institutional Trustee and the Litigation Trustees without the consent of the
    Holder:

           (i) to cure any ambiguity;

                                      B-25
<PAGE>
           (ii) to correct or supplement any provision in this Declaration that
       may be defective or inconsistent with any other provision of this
       Declaration;

           (iii) to add to the covenants, restrictions or obligations of the
       Litigation Trustees or to alter the allocation of duties between the
       Litigation Trustees and the Institutional Trustee;

           (iv) to modify, eliminate or add to any provision of this Declaration
       to such extent as may be necessary to ensure that the Payment Trust
       (a) will be classified for United States federal income tax purposes at
       all times as a grantor trust, or (b) will not be required to register as
       an Investment Company under the Investment Company Act (including without
       limitation to conform to any change in any applicable Rule under the
       Investment Company Act or written change in interpretation or application
       thereof by any legislative body, court, government agency or regulatory
       authority);

PROVIDED, HOWEVER, that no such modification, elimination or addition referred
to in clauses (i), (ii), or (iii) shall adversely affect the powers, preferences
or special rights of the Holder or cause the Payment Trust to fail to continue
to be classified as a grantor trust for purposes of United States federal income
taxation.

    (H) The Institutional Trustee may, but shall have no obligation to, execute
any amendment which materially adversely affects its rights, powers, immunities
or indemnities.

    Section 13.02  MEETINGS OF THE HOLDER; ACTION BY WRITTEN CONSENT.

    (a) Meetings of the Holder may be called at any time by the Litigation
Trustees to consider and act on any matter on which the Holder is entitled to
act under the terms of this Declaration. The Litigation Trustees shall call a
meeting of the Holder if directed to do so by the Holder. Such direction shall
be given by delivering to the Litigation Trustees one or more calls in a writing
stating that the signing Holder wishes to call a meeting and indicating the
general or specific purpose for which the meeting is to be called.

    (b) The following provisions shall apply to meetings of the Holder:

        (i) notice of any such meeting (with a copy to the Institutional
    Trustee) shall be given to the Holder at least 20 days and not more than
    60 days before the date of such meeting.

    Whenever a vote, consent or approval of the Holder is permitted or required
under this Declaration, such vote, consent or approval may be given at a meeting
of the Holder. Any action that may be taken at a meeting of the Holder may be
taken without a meeting if a consent in writing setting forth the action so
taken is signed by the Holder. The Litigation Trustees may specify that any
written ballot submitted to the Holder for the purpose of taking any action
without a meeting shall be returned to the Payment Trust within the time
specified by the Litigation Trustees;

        (ii) the Holder may authorize any Person to act for it by proxy on all
    matters in which the Holder is entitled to participate, including waiving
    notice of any meeting, or voting or participating at a meeting. No proxy
    shall be valid after the expiration of 11 months from the date thereof
    unless otherwise provided in the proxy. Every proxy shall be revocable at
    the pleasure of the Holder. Except as otherwise provided herein, all matters
    relating to the giving, voting or validity of proxies shall be governed by
    the General Corporation Law of the State of Delaware relating to proxies,
    and judicial interpretations thereunder, as if the Payment Trust were a
    Delaware corporation and the Holder were stockholders of a Delaware
    corporation; each meeting of the Holder shall be conducted by the Litigation
    Trustees or by such other Person that the Litigation Trustees may designate;
    and

        (iii) unless the Business Trust Act or this Declaration otherwise
    provides, the Litigation Trustees, in their sole discretion, shall establish
    all other provisions relating to meetings of the

                                      B-26
<PAGE>
    Holder, including notice of the time, place or purpose of any meeting at
    which any matter is to be voted on by the Holder, waiver of any such notice,
    action by consent without a meeting, the establishment of a record date,
    quorum requirements, voting in person or by proxy or any other matter with
    respect to the exercise of any such right to vote.

                                  ARTICLE XIV.
         REPRESENTATIONS OF INSTITUTIONAL TRUSTEE AND DELAWARE TRUSTEE

    Section 14.01  REPRESENTATIONS AND WARRANTIES OF THE INSTITUTIONAL
TRUSTEE.  The Trustee that acts as initial Institutional Trustee represents and
warrants to the Payment Trust and to the Sponsor at the date of this
Declaration, and each Successor Institutional Trustee represents and warrants to
the Payment Trust at the time of the Successor Institutional Trustee's
acceptance of its appointment as Institutional Trustee, that:

    (a) the Institutional Trustee is a corporation or banking association with
trust powers, duly organized, validly existing and in good standing under the
laws of the United States or a State thereof with power and authority to execute
and deliver, and to carry out and perform its obligations under the terms of,
this Declaration;

    (b) the execution, delivery and performance by the Institutional Trustee of
this Declaration has been duly authorized by all necessary corporate action on
the part of the Institutional Trustee. This Declaration has been duly executed
and delivered by the Institutional Trustee, and it constitutes a legal, valid
and binding obligation of the Institutional Trustee, enforceable against it in
accordance with its terms, subject to applicable bankruptcy, reorganization,
moratorium, insolvency, and other similar laws affecting creditors' rights
generally and to general principles of equity (regardless of whether considered
in a proceeding in equity or at law); and

    (c) the execution, delivery and performance of this Declaration by the
Institutional Trustee does not conflict with or constitute a breach of the
charter or by-laws of the Institutional Trustee.

    Section 14.02  REPRESENTATIONS AND WARRANTIES OF THE DELAWARE TRUSTEE.  The
Trustee that acts as initial Delaware Trustee represents and warrants to the
Payment Trust and to the Sponsor at the date of this Declaration, and each
Successor Delaware Trustee represents and warrants to the Payment Trust at the
time of the Successor Delaware Trustee's acceptance of its appointment as
Delaware Trustee, that:

    (a) the Delaware Trustee, if other than an individual, is duly organized,
validly existing and in good standing under the laws of the State of Delaware,
with power and authority to execute and deliver, and to carry out and perform
its obligations under the terms of, this Declaration;

    (b) the Delaware Trustee has been authorized to perform its obligations
under the Certificate of Trust and this Declaration. This Declaration under
Delaware law constitutes a legal, valid and binding obligation of the Delaware
Trustee, enforceable against it in accordance with its terms, subject to
applicable bankruptcy, reorganization, moratorium, insolvency, and other similar
laws affecting creditors' rights generally and to general principles of equity
(regardless of whether considered in a proceeding in equity or at law); and

    (c) the Delaware Trustee is a natural person who is a resident of the State
of Delaware or, if not a natural person, an entity which has its principal place
of business in the State of Delaware and, in either case, a Person that
satisfies for the Payment Trust the requirements of Section 3807 of the Business
Trust Act.

                                      B-27
<PAGE>
                                  ARTICLE XV.
                                 MISCELLANEOUS

    Section 15.01  NOTICES.  All notices provided for in this Declaration shall
be in writing, duly signed by the party giving such notice, and shall be
delivered, telecopied or mailed by first class mail, as follows:

    (a) if given to the Payment Trust, in care of the Institutional Trustee at
the Payment Trust's mailing address set forth below (or such other address as
the Payment Trust may give notice of to the Holder):

------------------------------------

------------------------------------

    Attention:

    Facsimile:

    with a copy to:

------------------------------------

------------------------------------

    Attention:

    Facsimile:

    (b) if given to the Delaware Trustee, at the mailing address set forth below
(or such other address as the Delaware Trustee may give notice of to the
Holder):

------------------------------------

------------------------------------

    Attention:

    Facsimile:

    (c) if given to the Institutional Trustee, at the mailing address set forth
below (or such other address as the Institutional Trustee may give notice of to
the Holder).

------------------------------------

------------------------------------

    Attention:

    Facsimile:

                                      B-28
<PAGE>
    (d) if given to the Litigation Trustees, at each mailing address set forth
below (or such other address as the Payment Trust may give notice of to the
Holder):

------------------------------------

------------------------------------

    Attention:

    Facsimile:

------------------------------------

------------------------------------

    Attention:

    Facsimile:

    (e) if given to any Holder, at the address set forth on the books and
records of the Payment Trust.

    All such notices shall be deemed to have been given when received in person,
telecopied with receipt confirmed, or mailed by first class mail, postage
prepaid, except that if a notice or other document is refused delivery or cannot
be delivered because of a changed address of which no notice was given, such
notice or other document shall be deemed to have been delivered on the date of
such refusal or inability to deliver the same.

    Section 15.02  GOVERNING LAW.  This Declaration and the rights of the
parties hereunder shall be governed by and interpreted in accordance with the
laws of the State of Delaware and all rights and remedies shall be governed by
such laws without regard to the principles of conflict of laws of the State of
Delaware or any other jurisdiction that would call for the application of the
law of any jurisdiction other than the State of Delaware; PROVIDED, HOWEVER,
that, to the fullest extent permitted by law, there shall not be applicable to
the Payment Trust, the Trustees or this Declaration any provision of the laws
(statutory or common) of the State of Delaware pertaining to trusts that relate
to or regulate, in a manner inconsistent with the terms hereof (a) the filing
with any court or governmental body or agency of Trustee accounts or schedules
of Trustee fees and charges, (b) affirmative requirements to post bonds for
Trustees, officers, agents or employees of a trust, (c) the necessity for
obtaining court or other governmental approval concerning the acquisition,
holding or disposition of real or personal property, (d) fees or other sums
payable to Trustees, officers, agents or employees of a trust, (e) the
allocation of receipts and expenditures to income or principal,
(f) restrictions or limitations on the permissible nature, amount or
concentration of trust investments or requirements relating to the titling,
storage or other manner of holding or investing trust assets or (g) the
establishment of fiduciary or other standards of responsibility or limitations
on the acts or powers of Trustees that are inconsistent with the limitations or
liabilities or authorities and powers of the Trustees as set forth or referenced
in this Declaration. Section 3540 and, to the fullest extent permitted by
applicable law, Section 3561, of Title 12 of the Delaware Code shall not apply
to the Payment Trust.

    Section 15.03  INTENTION OF PARTIES.  It is the intention of the parties
hereto that the Payment Trust be classified for United States federal income tax
purposes as a grantor trust that is formed to hold the Commitment and liquidate
the Commitment, as provided for herein. The provisions of this Declaration shall
be interpreted to further this intention of the parties.

    Section 15.04  HEADINGS.  Headings contained in this Declaration are
inserted for convenience of reference only and do not affect the interpretation
of this Declaration or any provision hereof.

                                      B-29
<PAGE>
    Section 15.05  SUCCESSORS AND ASSIGNS.  Whenever in this Declaration any of
the parties hereto is named or referred to, the successors and assigns of such
party shall be deemed to be included, and all covenants and agreements in this
Declaration by the Sponsor and the Trustees shall bind and inure to the benefit
of their respective successors and assigns, whether or not so expressed.

    Section 15.06  PARTIAL ENFORCEABILITY.  If any provision of this
Declaration, or the application of such provision to any Person or circumstance,
shall be held invalid, the remainder of this Declaration, or the application of
such provision to persons or circumstances other than those to which it is held
invalid, shall not be affected thereby.

    Section 15.07  SPECIFIC PERFORMANCE.  The Sponsor hereby agrees that the
obligations imposed on it in this Declaration are special, unique and of an
extraordinary character, and that, in the event of breach by the Sponsor,
damages would not be an adequate remedy and the Sponsor shall be entitled to
specific performance and injunctive and other equitable relief, including
declaratory relief, in addition to any other remedy to which it may be entitled,
at law or in equity; and the Sponsor hereby further agrees to waive any
requirement for the securing or posting of any bond in connection with the
obtaining of any such injunctive or other equitable relief.

    Section 15.08  COUNTERPARTS.  This Declaration may contain more than one
counterpart of the signature page and this Declaration may be executed by the
affixing of the signature of each of the Trustees and the Sponsor to any of such
counterpart signature pages. All of such counterpart signature pages shall be
read as though one, and they shall have the same force and effect as though all
of the signers had signed a single signature page.

    Section 15.09  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.  The
Trustees, the Sponsor, and the Litigation Trust hereby consent to (i) the
non-exclusive jurisdiction of the Courts of the State of Delaware and any
Federal Court sitting in Wilmington, Delaware, and (ii) service of process by
mail at their last known address.

    Section 15.10  DEFAULT RULES.  Regardless of whether this Declaration
specifically refers to particular Default Rules:

    (a) if any provision of this Declaration conflicts with a Default Rule, the
provision of this Declaration controls and the Default Rules is modified or
negated accordingly,

    (b) if it is necessary to construe a Default Rule as modified or negated in
order to effectuate any provision of this Declaration, the Default Rule is
modified or negated accordingly, and

    (c) the fact that some Default Rules are referred to herein shall not limit
the application of Sections 15.10(a) or (b) in those instances where no Default
Rule has been referred to herein.

                                      B-30
<PAGE>
    IN WITNESS WHEREOF, the undersigned have caused these presents to be
executed as of the day and year first above written.

    [                            ]
    as Delaware Trustee
    By:
    -------------------------------------
    Name:
    Title:

    [                            ]
    as Institutional Trustee
    By:
    -------------------------------------
    Name:
    Title:

---------------------------------
          , as Litigation Trustee

---------------------------------
          , as Litigation Trustee

    BANK UNITED CORP.,
    as Sponsor
    By:
    -------------------------------------
    Name:
    Title:

                                      B-31
<PAGE>
                                                                      APPENDIX C

                                    FORM OF
                              COMMITMENT AGREEMENT

    This Commitment Agreement, dated as of February   , 2001 (this "Agreement"),
by and among Bank United Corp., a Delaware corporation, the Bank United Corp.
Litigation Contingent Payment Rights Trust (the "Litigation Trust"), a Delaware
business trust and the Bank United Corp. Payment Rights Trust (the "Payment
Trust"), a Delaware business trust.

                                    RECITALS

    WHEREAS, Bank United Corp. has entered into an Agreement and Plan of Merger,
dated as of August 18, 2000 (as amended, the "Merger Agreement"), with
Washington Mutual, Inc., a Washington corporation pursuant to which Bank United
Corp. would merge with and into Washington Mutual, Inc. (the "Merger"); and

    WHEREAS, Bank United Corp. has entered into an Agreement and Plan of Merger,
dated as of September 18, 2000 (the "Plan of Reorganization"), with CPR Merger
Corporation, a wholly owned subsidiary of Bank United Corp. ("Merger Sub"),
pursuant to which Merger Sub will merge with and into Bank United Corp. (the
"Reorganization"), with Bank United Corp. as the surviving corporation in the
Reorganization.

    WHEREAS, pursuant to the Merger Agreement, Bank United Corp. has agreed to
enter into this Agreement;

    NOW, THEREFORE, in consideration of the premises and of the mutual covenants
and agreements contained herein the parties agree as follows:

                         ARTICLE I. CERTAIN DEFINITIONS

    1.01  Certain Definitions.

    (a) The following terms are used in this Agreement with the meanings set
forth below:

    "Accountant" has the meaning set forth in Section 2.02 hereof.

    "Assumed Section 483 Tax Benefit" means an amount equal to the tax benefit
that would be allowed to the Bank United Group under Section 483(a) by reason of
the payment of the Commitment Amount computed as set forth in Section 2.03
hereof.

    "Assumed Tax Benefit" means any Assumed Section 483 Tax Benefit and Assumed
Trust Expense Tax Benefit.

    "Assumed Tax Liability" means an amount equal to the income (including
franchise) tax liability of the Bank United Group (not giving effect to any
deductions attributable to payments of the Commitment Amount) attributable to
the receipt of the Litigation Proceeds computed as set forth in Section 2.03
hereof.

    "Assumed Trust Expense Tax Benefit" means an amount equal to the tax benefit
that would be allowed to the Bank United Group by reason of deductions for
amounts paid to the Trusts pursuant to Section 2.04 (other than any amounts
payable under Section 3(b) of the Litigation Trust Agreement of Jonathon K.
Heffron) and for the fair market value of the CPR Certificates issued to the
Litigation Trustees pursuant to the Litigation Trustee Agreements as of the date
of such issuance, computed in each case as set forth in Section 2.03 hereof.

    "Bank United" means Bank United Corp. and its successors (including
Washington Mutual, Inc. upon and after the Merger).

    "Bank United Certificate" has the meaning set forth in Section 2.02 hereof.

    "Bank United Group" means Bank United, Bank United, their respective
successors, their subsidiaries and affiliates and the subsidiaries and
affiliates of their respective successors, including
<PAGE>
without limitation Washington Mutual, Inc. and its affiliates and subsidiaries
after the Merger, provided that Hyperion shall not be deemed to be a member of
the Bank United Group.

    "Bank United Litigation Committee" has the meaning set forth in the
Litigation Trust Agreement.

    "Bank United Parties" means Bank United, Bank United, and their respective
affiliates, officers, directors, employees and agents (such persons and
entities, the "Bank United Parties" and, individually, a "Bank United Party").

    "BNKU" means Bank United of Texas, fsb and its successors (including without
limitation, after the Merger, Washington Mutual Bank, FA or any other subsidiary
of Washington Mutual, Inc. into which BNKU is merged).

    "Cash Proceeds" means an amount equal to any cash payment actually received
by the Bank United Group pursuant to a final, nonappealable judgment or a final
settlement of the Litigation. "Cash Proceeds" shall not include any amounts paid
or payable to Hyperion pursuant to the Recovery Agreement.

    "Code" means the Internal Revenue Code of 1986, as amended.

    "Commitment Amount" means an amount equal to (A) the Litigation Proceeds,
minus (B) the Reimbursements plus (C) the Assumed Tax Benefit.

    "Controlled Subsidiary" means any person at least 80% of the outstanding
shares of Voting Stock (except for directors' qualifying shares) of which is at
the time owned directly or indirectly by Bank United Corp.

    "CPR Calculation Certificate" has the meaning set forth in Section 2.02
hereof.

    "Damages" means with respect to Bank United Parties all losses, liabilities,
damages, judgments, demands, suits, claims, assessments, charges, fines,
penalties, costs and expenses, including reasonable attorney's fees and expenses
and other costs and expenses associated with defense of a claim, whether or not
in a formal proceeding (other than in connection with claims by stockholders of
Bank United against Bank United's directors with respect to actions taken at or
prior to the Merger), arising out of or relating to (i) with respect to claims
brought by holders of CPR Certificates in their capacity as holders of CPR
Certificates, any matter whatsoever and (ii) with respect to claims brought by
any other party, any matter relating to either of the Trusts, the CPR
Certificates, the CPR Certificate Distribution, the Litigation and any actions
taken by the Trustees (including actions taken by the Trustees in their capacity
as officers or directors of Bank United or Washington Mutual, Inc. so long as
such actions relate to either of the Trusts including, without limitation, the
negotiation of the terms of the Trusts and the CPR Certificates and the approval
of the establishment of the Trusts and the CPR Certificate Distribution and
related transactions, but otherwise excluding actions taken by the Trustees in
such capacities), other than with respect to Damages arising from claims against
(i) Bank United for breach of this Agreement, the Litigation Trust Agreement,
the Payment Trust Agreement, the Litigation Trustee Agreements or the Merger
Agreement, (ii) Bank United for failure to deliver any CPR Certificate when due
or to return to the Litigation Trust for cancellation of any CPR Certificate
required to be returned when so required, (iii) Bank United for failure to
deposit from time to time the amounts required pursuant to Section 2.04, or
(iv) BNKU for breach of any depository relationship obligations it may have with
respect to the amounts paid by Bank United pursuant to Section 2.04.

    "Determination" means (a) a determination that Litigation Proceeds are in
whole or in part not includible in gross income, (b) a determination that no
deduction is allowed (or that any allowed deduction is limited) in respect of
payments of the Commitment Amount under Section 483(a) in whole or in part, or
(c) a determination that a deduction is allowed in whole or in part for amounts
paid to the Trusts pursuant to Section 2.04 or that a deduction is allowed for
the fair market value of the CPR Certificates issued to the Litigation Trustees
pursuant to the Litigation Trustee Agreements. With respect to clause (a), no
such Determination shall be deemed to be made unless it is made prior

                                      C-2
<PAGE>
to the earlier of (x) thirty days before the date of filing by the Bank United
Group of the federal tax return for the taxable year in which the Litigation
Proceeds are assumed to be includible in gross income or (y) the receipt by the
Bank United Group of the Litigation Proceeds. With respect to clause (b), no
such Determination shall be deemed to be made with respect to any payment of the
Commitment Amount unless such Determination is made prior to (a) the end of the
30th day following the delivery to the Litigation Trust of the Bank United
Certificate with respect to such payment of the Commitment Amount, if the
Litigation Trust does not deliver a Notice of Objection within such 30-day
period with respect to such Bank United Certificate, or (b) the Resolution with
respect to such payment of the Commitment Amount, if the Litigation Trust
delivers a Notice of Objection within the 30-day period referred to in
clause (a) above with respect to such Bank United Certificate. With respect to
clause (c), no such Determination shall be deemed to be made unless it is made
prior to the receipt by the Bank United Group of the Litigation Proceeds.

    "Due Date" has the meaning set forth in Section 2.02 hereof.

    "Expense Accounting" has the meaning set forth in Section 2.04(a) hereof.

    "FHLB" means the Federal Home Loan Bank of which BNKU is a member as of the
relevant time.

    "FIRREA" means the Financial Institutions Reform, Recovery and Enforcement
Act of 1989.

    "Hyperion" means Hyperion Partners L.P., a Delaware limited partnership.

    "IRS" means the Internal Revenue Service.

    "LIBOR" means, as of a particular date, the 3-month London Inter-Bank Offer
Rate as quoted in the Wall Street Journal.

    "Litigation" means the litigation filed on July 25, 1995, by Bank United
Corp., Bank United and Hyperion Partners L.P. against the United States in the
U.S. Court of Federal Claims for alleged failures of the United States to adhere
to its agreement to waive or forbear from enforcing certain provisions
concerning regulatory capital requirements, liquidity requirements, accounting
requirements and other matters, and any substitute or ancillary action,
litigation or arbitration with respect to the claims made in such action.

    "Litigation Proceeds" means any and all Cash Proceeds and Non-Cash Proceeds.

    "Litigation Trust" has the meaning set forth in the preamble to this
Agreement.

    "Litigation Trust Agreement" means the Amended and Restated Declaration of
Trust, dated as of February   , 2001, among the trustees named therein and the
sponsor of the Litigation Trust.

    "Litigation Trust Expense Amount" has the meaning set forth in Section 2.04
hereof.

    "Litigation Trustee Agreements" means the Litigation Trustee Agreement,
dated as of August 18, 2000, between Jonathon K. Heffron and Bank United and the
Litigation Trustee Agreement, dated as of August 18, 2000, between Salvatore A.
Ranieri and Bank United.

    "Litigation Trustees" has the meaning set forth in the Litigation Trust
Agreement.

    "Non-Cash Proceeds" means the non-cash payments, if any, actually received
by the Bank United Group pursuant to a final, non-appealable judgment or a final
settlement of the Litigation. "Non-Cash Proceeds" shall not include any such
amounts payable to Hyperion pursuant to the Recovery Agreement.

    "Notice of Agreement" has the meaning set forth in Section 2.02 hereof.

    "Notice of Objection" has the meaning set forth in Section 2.02 hereof.

    "Payment Trust" has the meaning given in the first paragraph of this
Agreement.

                                      C-3
<PAGE>
    "Payment Trust Agreement" means the Amended and Restated Declaration of
Trust, dated as of February   , 2001, among the trustees named therein and the
sponsor of the Payment Trust.

    "Payment Trust Expense Amount" has the meaning set forth in Section 2.04
hereof.

    "Payment Trust Expense Notice" has the meaning set forth in Section 2.04
hereof.

    "Proceeds Amount" means the amount paid to the Payment Trust pursuant to
Section 2.01(a) plus any interest earned thereon pursuant to Section 2.01(c),
less any amounts withdrawn by Bank United pursuant to Section 2.01(d).

    "Proceeds Notice" has the meaning set forth in Section 2.02 hereof.

    "Recovery Agreement" means that certain Recovery Agreement dated July 24,
1996, by and among Bank United, BNKU and Hyperion.

    "Reference Rate" means the reference rate or an equivalent rate announced
from time to time of Bank of America or any successor (or, if no successor
remains in existence or publicly announces a rate, the commercial bank with the
largest amount of deposits in the State of New York as of the most recent year
end prior to the applicable date for which information is publicly available and
which publicly announces such a rate, as determined in good faith by Bank
United), as in effect from time to time.

    "Reimbursements" means an amount equal to (i) the sum of the amounts paid to
the Trusts pursuant to Section 2.04 (other than any amounts payable under
Section 3(b) of the Litigation Trustee Agreement of Jonathon K. Heffron) plus
(ii) interest on the amounts paid to the Trusts pursuant to Section 2.04
calculated from the time of any such payment at an annual interest rate equal to
(A) seven percent (7%) on the amount of such aggregate payments not exceeding
$5,000,000, (B) ten percent (10%) on the amount of such aggregate payments
greater than $5,000,000 but not exceeding $10,000,000, and (C) fifteen percent
(15%) on the amount of such aggregate payments greater than $10,000,000, plus
(iii) the Assumed Tax Liability, plus (iv) in the event Litigation Proceeds are
required to be included in income for federal income tax purposes in a taxable
year prior to the year such proceeds are received in cash (because of either the
accrual of Cash Proceeds before the payment thereof or the time required to
liquidate Non-Cash Proceeds), interest on any cash payment of taxes on such
income at an annual interest rate equal to seven percent (7%) compounded
annually from the date of payment of taxes on such income to the date of receipt
of cash, plus (v) the aggregate amount of any Damages actually suffered by any
Bank United Party, plus (vi) the aggregate amount any indemnification provided
by Bank United pursuant to Section 3(c)(v) of the Litigation Trustee Agreement
of Jonathon K. Heffron and Section 3(b)(iv) of the Litigation Trustee Agreement
of Salvatore A. Ranieri; plus (vii) any expenses reasonably incurred by Bank
United in connection with the liquidation of Non-Cash Proceeds.

    "Reorganization" has the meaning set forth in the recitals hereof.

    "Resolution" has the meaning set forth in Section 2.02 hereof.

    "Section 483(a)" means Section 483(a) of the Code.

    "Tax Assumptions" means (i), if there is no Determination, the following
assumptions or (ii), if there is a Determination, the following assumptions as
modified by such Determination:

    (a) The Litigation Proceeds will be includible in gross income as ordinary
income in full.

    (b) Payments of the Commitment Amount will not be deductible except that
Section 483(a) will apply to payments of the Commitment Amount, other than those
allocable to CPR Certificates issued on exercise of employee options or
otherwise in a transaction that is not a sale or exchange, and payments of the
Commitment Amount will be deductible to the extent treated by Section 483(a) as
interest expense; it being understood that it is not intended that the
distribution of the CPR

                                      C-4
<PAGE>
Certificates pursuant to the Reorganization will result in the characterization
of such distribution as not constituting "a sale or exchange."

    (c) The Bank United Group will not be entitled to a deduction for amounts
paid to the Trusts pursuant to Section 2.04 and for the fair market value of the
CPR Certificates issued to the Litigation Trustees pursuant to the Litigation
Trustee Agreements.

    (d) The income tax liability attributable to the assumed inclusion of all or
a portion of the Litigation Proceeds in gross income as ordinary income and the
benefit of any deduction shall be (i) the product of the amount of such income
or deduction and the highest statutory rate of federal income tax applicable to
corporations for the year in which the income is assumed to be included or the
deduction is assumed to be realized plus (ii) the product of such income or
deduction and the net combined marginal rate of state and local income (or
franchise) tax of the relevant member or members of the Bank United Group for
the year in which the income is assumed to be included and the deduction is
assumed to be realized, net of the federal income tax benefit (calculated based
on the rate in clause (i) of this paragraph) of such state or local income (or
franchise) tax. The relevant member or members of the Bank United Group shall be
the member or members that is or are assumed to include the Litigation Proceeds
in income or is or are assumed to be allowed the relevant deduction.

    (e) Any benefit from any deduction allowable to the Bank United Group for
amounts referred to in paragraphs (b) and (c) of these assumptions shall be
assumed to be realized (i) when those payments are made to the extent those
payments do not exceed the Litigation Proceeds included in income for the same
taxable year, or (ii) otherwise when, taking into account other deductions or
losses or credits of the Bank United Group, the deduction would reduce the tax
otherwise payable or result in a refund of tax already paid.

    (f) Bank United will be entitled to rely on a written opinion of a
nationally recognized law firm with expertise on the matter on which the opinion
is sought (with a copy of such opinion to the Litigation Trustees) that is
selected by Bank United and (unless such law firm is principal outside tax
counsel to Bank United) reasonably acceptable to the Litigation Trustees in
determining whether there has been a Determination and in otherwise applying the
Tax Assumptions to determine the income (including franchise) tax liability of
the Bank United Group attributable to the receipt of the Litigation Proceeds and
any Assumed Tax Benefits.

    (g) If the Assumed Tax Liability or the Assumed Tax Benefit cannot be
computed at the time of the receipt of the Cash Proceeds or a payment of the
Commitment Amount because of the absence of information as to tax rates and
other factors described in the definition of Assumed Tax Liability or the
definition of Assumed Tax Benefit, as the case may be, the Bank United Group
shall compute a tentative Assumed Tax Liability or a tentative Assumed Tax
Benefit, as the case may be, based on such reasonable assumptions, which are
consistent with respect to the Assumed Tax Liability and the Assumed Tax
Benefit, that in the reasonable opinion of the Bank United Group would protect
the Bank United Group against any risk of the loss. The payment of the
Commitment Amount shall be based on such tentative Assumed Tax Liability or such
tentative Assumed Tax Benefit computation, as the case may be. As soon as
feasible, but in no event later than 12 months after the end of the taxable year
in which the Commitment Amount is paid based on the tentative Assumed Tax
Liability and Assumed Tax Benefit, the Bank United Group shall recompute the
Assumed Tax Liability or the Assumed Tax Benefit, as the case may be, and pay to
the Payment Trust any excess of the re-computed Commitment Amount over the
Commitment Amount that was initially calculated plus interest for the period
over which the payment was deferred at a rate equal to BNKU's cost of funds as
submitted monthly to the FHLB.

    "Trustees" means all of the trustees of the Litigation Trust together with
all of the trustees of the Payment Trust.

                                      C-5
<PAGE>
    "Trusts" means the Litigation Trust and the Payment Trust.

    "Voting Stock" means, with respect to any person, stock of any class or
classes, however designated, having ordinary voting power for the election of a
majority of the board of such person, other than stock having such power only by
reason of the happening of a contingency.

    (b) Any capitalized terms used but not defined herein shall have the
meanings ascribed to such terms in the Merger Agreement.

                           ARTICLE II. THE COMMITMENT

    2.01  The Commitment.

    (a) Bank United shall pay to the Payment Trust the Commitment Amount within
the time specified under Section 2.02 hereof, (i) increased an amount equal to
interest computed on the Commitment Amount at LIBOR from the date of the receipt
by Bank United Group of the applicable Litigation Proceeds until the date such
Litigation Proceeds are distributed to the Payment Trust, such rate and period
to be modified as specifically set forth in Section 2.02(b), 2.02(c) and
2.02(d), and (ii) decreased by the product of the interest computed in
clause (i) and the maximum applicable combined corporate federal and state
income tax rates in effect for the period of interest computation. In the event
that the Bank United Group receives the Litigation Proceeds in staggered
payments, the procedures described in this Article II with respect to the
calculation and payment of the Commitment Amount will apply in full force to
each such staggered payment of the Commitment Amount.

    (b) The Payment Trust shall pay to the Litigation Trust the Proceeds Amount
promptly upon its receipt of the Commitment Amount; provided, however, that the
Payment Trust shall not pay the Proceeds Amount to the Litigation Trust prior to
the expiration of the 366 day period commencing on the date of the distribution
of the CPR Certificates to the stockholders of Bank United pursuant to the
Reorganization. To the extent not inconsistent with the prior sentence, in the
event that the Payment Trust receives the Commitment Amount in staggered
payments, the Payment Trust will make staggered payments of the Proceeds Amount.

    (c) During any period when the Payment Trust holds the Commitment Amount,
the Payment Trust may invest the Commitment Amount in any Permitted Investment
as such term is defined in the Payment Trust Agreement.

    (d) Bank United shall have the right to withdraw from the Payment Trust,
from time to time, an amount equal to any taxes payable by the Bank United Group
solely by reason of the ownership of the Payment Trust. Any such taxes that are
income taxes shall be determined based the principles set forth in
Paragraph (d) of the definition of Tax Assumptions above; provided, however, if
any such income is exempt from federal, state or local income taxes, appropriate
adjustments shall be made to such principles to reflect such exemption.

    2.02  Payment Procedures.

    (a) Proceeds Notice; Bank United Certificate. Within 10 days of the receipt
by the Bank United Group of any Litigation Proceeds, Bank United will deliver to
the Trustees a written notice (the "Proceeds Notice") specifying that such
Litigation Proceeds have been received and describing the type and amount of any
Non-Cash Proceeds received. Within 10 days of the delivery of the Proceeds
Notice, the Litigation Trustees shall deliver to Bank United written
instructions to liquidate the Non-Cash Proceeds received. If so instructed, Bank
United will then liquidate or cause to be liquidated the Non-Cash Proceeds in
accordance with the instructions. Bank United shall promptly notify the
Litigation Trustees if such instructions cannot be followed and shall request
further instructions.

    As promptly as practicable but in no event later than 30 days after the
later of the receipt by Bank United of such Litigation Proceeds and of the
liquidation by Bank United of Non-Cash Proceeds, Bank United will deliver to the
Litigation Trustees a certificate (the "Bank United Certificate") setting forth

                                      C-6
<PAGE>
the calculation of the portion of the Commitment Amount with respect to such
Litigation Proceeds. The Bank United Certificate shall set forth each of the
items required under this Agreement to calculate the Commitment Amount,
including the amount of Litigation Proceeds and the amount of (and calculation
of) each component of the Reimbursements and the assumptions underlying the
determination of each item and shall be substantially in the form of EXHIBIT A
hereto, and Bank United shall attach to the Bank United Certificate financial
and other documentation reasonably sufficient to support each item and
assumption used to calculate the Commitment Amount. Within 30 days of delivery
of the Bank United Certificate, the Litigation Trust will give written notice
specifying whether it agrees or objects (a "Notice of Agreement" and a "Notice
of Objection", respectively) to the calculation in the Bank United Certificate
of the portion of the Commitment Amount with respect to such Litigation
Proceeds, and, in the case of a Notice of Objection, will specify in reasonable
detail the nature of such objection. If the Litigation Trust delivers a Notice
of Agreement, Bank United will then deliver the portion of the Commitment Amount
with respect to such Litigation Proceeds to the Payment Trust within 5 business
days of such Notice of Agreement. If the Litigation Trust delivers a Notice of
Objection within such 30-day period, Bank United will deliver such portion of
the Commitment Amount to the Payment Trust only upon a Resolution (as defined
herein).

    (b) Dispute Resolution. If the Litigation Trust delivers a Notice of
Objection within such 30-day period, the Litigation Trust shall as promptly as
practicable following delivery of the Notice of Objection deliver to Bank United
a certificate (the "CPR Calculation Certificate") setting forth its calculation
of such portion of the Commitment Amount. The CPR Calculation Certificate shall
set forth each of the items required under this Agreement to calculate such
portion of the Commitment Amount, including the amount of Litigation Proceeds
and the amount of (and calculation of) each component of the Reimbursements and
the assumptions underlying the determination of each item and shall be
substantially in the form of EXHIBIT A hereto, and the Litigation Trust shall
attach to the CPR Calculation Certificate financial and other documentation
reasonably sufficient to support each item and assumption used to calculate such
portion of the Commitment Amount. If Bank United does not agree with the
Litigation Trust's calculation of such portion of the Commitment Amount, then
within 10 business days of the delivery by the Litigation Trust of the CPR
Calculation Certificate, Bank United and the Litigation Trust shall submit the
calculation of such portion of the Commitment Amount to a mutually agreed upon
independent certified public accountant (the "Accountant"). The Accountant shall
be instructed to resolve on an expedited basis in writing any and all matters
which remain in dispute and were identified in the Notice of Objection. The
Accountant shall be instructed to recompute such portion of the Commitment
Amount based upon the formulae and definitions set forth in this Agreement and
the Accountant's calculation shall be binding on both parties hereto (a
"Resolution"). In the event it is determined that Bank United's calculation was
incorrect, in addition to such portion of the Commitment Amount, Bank United
shall pay to the Payment Trust interest on such portion of the Commitment Amount
calculated from the date that the Litigation Trust delivered its Notice of
Objection at an annual interest rate equal to the Reference Rate plus 250 basis
points. Bank United and the Litigation Trust shall share equally the expenses of
the Accountant in connection with the performance of its duties described
herein. If the Litigation Trust delivers a Notice of Objection with respect to
the payment of any portion of the Commitment Amount within the applicable 30-day
period and prior to the Resolution there is a Determination to the effect that
no deduction is allowed (or that any allowed deduction is limited) in respect of
payments of the Commitment Amount under Section 483(a) in whole or in part, then
Bank United shall have the right to deliver a new Bank United Certificate with a
new calculation of that portion of the Commitment Amount, and the previously
delivered Bank United Certificate with respect to that portion of the Commitment
Amount shall be considered null and void; provided, however, that if Bank United
delivers such a new Bank United Certificate, Bank United shall be required to
pay interest on that portion of the Commitment Amount from the date of delivery
of the first Bank United Certificate relating to such portion of the Commitment
Amount to the date of delivery of the new Bank United Certificate relating to
such portion of the Commitment Amount at a rate equal to BNKU's cost of funds as
submitted monthly to

                                      C-7
<PAGE>
the FHLB. The same procedures described in this Section 2.02(b) for the
resolution of any disputes with respect to the calculation contained in a Bank
United Certificate will apply equally to the calculation in the new Bank United
Certificate with respect to such portion of the Commitment Amount.

    (c) Timing of Payments. Bank United shall pay to the Payment Trust the
portion of the Commitment Amount with respect to the relevant Litigation
Proceeds (i) if the Litigation Trust does not deliver a Notice of Objection to
the Bank United Certificate with respect to such portion of the Commitment
Amount within the 30-day period described above, within 5 business days of the
earlier of the delivery of the Notice of Agreement with respect to such Bank
United Certificate or the 30th day following the delivery by Bank United of such
Bank United Certificate, or (ii) if the Litigation Trust does deliver a Notice
of Objection with respect to such Bank United Certificate within the 30-day
period described above, within 5 business days of the Resolution with respect to
such portion of the Commitment Amount (each, a "Due Date"). Notwithstanding the
foregoing, to the extent that BNKU is not permitted due to regulatory
restrictions to distribute to either Bank United or BNKU's immediate parent
company all or a portion of the Litigation Proceeds, the applicable Due Date
with respect to such portion of the Litigation Proceeds that BNKU cannot
distribute due to such regulatory restrictions shall be extended until BNKU
secures regulatory approval of its distribution of such portion of the
Litigation Proceeds to Bank United or BNKU's immediate parent company, provided
that in no event shall the Due Date be extended pursuant to this sentence later
than the 90th day after the receipt by the Bank United Group of such Litigation
Proceeds. If Bank United does not pay such portion of the Commitment Amount by
the appropriate Due Date (subject to the adjustment in the previous sentence),
Bank United shall be obligated to pay to the Payment Trust such portion of the
Commitment Amount except that the interest on such portion of the Commitment
Amount shall be the annual interest rate equal to the Reference Rate plus 250
basis points calculated from the Due Date until the date such portion of the
Commitment Amount is paid.

    (d) Payment of Reconciliation Amount. As promptly as practicable but in no
event later than 30 days after the recomputation of the Assumed Tax Liability
and the Assumed Tax Benefit pursuant to paragraph (g) of the definition of "Tax
Assumptions" herein, Bank United shall pay to the Payment Trust any excess of
the re-computed Commitment Amount or portion thereof over the Commitment Amount
or portion thereof that was initially calculated plus interest for the period
over which the payment was deferred at a rate of BNKU's cost of funds as
submitted monthly to the FHLB. Along with such payment, Bank United shall
provide to the Trustees a Bank United Certificate setting forth the
re-calculation of the Commitment Amount or portion thereof. The standards and
procedures applicable to Bank United Certificates and the calculation of the
Commitment Amount and portions thereof set forth in this Section 2.02 shall
apply in full force to any Bank United Certificate delivered pursuant to this
paragraph (d).

    2.03  Agreements With Respect to Federal Income Tax.

    (a) Regardless of any position taken by the Bank United Group on any tax
return or in any claim for refund with respect to the receipt of the Litigation
Proceeds or payments of the Commitment Amount (or of the actual payment or
actual receipt of any taxes with respect thereto), the Assumed Tax Liability
shall, (i) if there is no Determination, be computed based on the Tax
Assumptions and (ii) if there is a Determination to the effect that Litigation
Proceeds are not includible in gross income in whole or in part, be computed on
the basis of the Tax Assumptions as such Tax Assumptions are modified by such
Determination.

    (b) Regardless of any position taken by the Bank United Group on any tax
return or in any claim for refund with respect to the receipt of the Litigation
Proceeds or payments of the Commitment Amount (or of the actual payment or
actual receipt of any taxes with respect thereto), the Assumed Section 483 Tax
Benefit shall, (i) if there is no Determination, be computed based on the Tax
Assumptions and (ii) if there is a Determination that no deduction is allowed
(or that any allowed

                                      C-8
<PAGE>
deduction is limited) with respect to payments of the Commitment Amount under
Section 483(a), be computed on the basis of the Tax Assumptions as such Tax
Assumptions are modified by such Determination.

    (c) Regardless of any position taken by the Bank United Group on any tax
return or in any claim for refund with respect to the receipt of Litigation
Proceeds, payments of the Commitment Amount or the issuance of CPR Certificates
to the Litigation Trustees pursuant to the Litigation Trustee Agreement (or of
the actual payment or actual receipt of any taxes with respect thereto), the
Assumed Trust Expense Tax Benefit shall (i) if there is no Determination, be
computed based on the Tax Assumptions and (ii) if there is a Determination that
a deduction is allowed in whole or in part for amounts paid to the Trusts
pursuant to Section 2.04 or for the fair market value of the CPR Certificates
issued to the Litigation Trustees pursuant to the Litigation Trustee Agreements,
be computed based on the Tax Assumptions as modified by such Determination.

    (d) A Determination that Litigation Proceeds are not includible in gross
income in whole or in part will be deemed to be made on the earlier of (i) the
date of a final judicial determination to such effect, binding upon BNKU (or its
successor), is made in the Litigation, (ii) the date a final agreement to which
Bank United is a party with the federal government to such effect is entered
into at the direction of the Litigation Trustees as part of the resolution of
the Litigation or a related IRS ruling to such effect issued to a member of the
Bank United Group in connection with such agreement (it being understood that
the Bank United Group shall be under no obligation to seek such a ruling or
refund or enter into such an agreement; provided that if requested the Bank
United Group will enter into such an agreement if such agreement does not impose
any liability or obligation whatsoever (other than a standard settlement release
relating only to the Litigation or other related claims that Bank United, BNKU
or Bank United's stockholders might have been able to bring as of immediately
prior to the Merger) on the Bank United Group or adversely affect or restrict
the conduct of its business or adversely affect its tax posture with respect to
other matters) and (iii) the effective date of a law, regulation or IRS ruling
to such effect that applies to Bank United or taxpayers generally, and would be
applicable to claims against the federal government arising out of capital
credits affected by FIRREA. Notwithstanding the foregoing, no such Determination
shall be deemed to be made unless it is made prior to the earlier of (x) thirty
days before the date of filing by the Bank United Group of the federal tax
return for the taxable year in which the Litigation Proceeds are assumed to be
includible in gross income or (y) the receipt by the Bank United Group of the
Litigation Proceeds.

    (e) A Determination with respect to the application of Section 483(a) to
payments of the Commitment Amount will be deemed to be made on the earlier of
(i) the date a final judicial determination to such effect binding upon Bank
United is made in the Litigation, (ii) the date a final agreement to which Bank
United is a party with the federal government to such effect is entered into at
the direction of the Litigation Trustees as part of the resolution of the
Litigation or a related IRS ruling to such effect issued to a member of the Bank
United Group in connection with such agreement (it being understood that the
Bank United Group shall be under no obligation to seek such a ruling or refund
or enter into such an agreement; provided that if requested the Bank United
Group will enter into such an agreement if such agreement does not impose any
liability or obligation whatsoever (other than a standard settlement release
relating only to the Litigation or other related claims that Bank United or BNKU
or Bank United's stockholders might have been able to bring as of immediately
prior to the Merger) on the Bank United Group or adversely affect or restrict
the conduct of its business or adversely affect its tax posture with respect to
other matters) and (iii) the effective date of a law, regulation or IRS ruling
or a judicial decision to such effect that applies to Bank United or taxpayers
generally. For all purposes under this Agreement, a deduction shall be
considered allowed under Section 483(a) to the extent that a deduction is
allowed, in an amount up to the deduction calculated under Section 483(a), under
another provision of the Code treating a portion of the Commitment Amount as
interest expense (including original issue discount). Notwithstanding the
foregoing, no such Determination shall be deemed to be made with respect to any
payment of the Commitment Amount

                                      C-9
<PAGE>
unless such Determination is made prior to (a) the end of the 30th day following
the delivery to the Litigation Trust of the Bank United Certificate with respect
to such payment of the Commitment Amount, if the Litigation Trust does not
deliver a Notice of Objection within such 30-day period with respect to such
Bank United Certificate, or (b) the Resolution with respect to such payment of
the Commitment Amount, if the Litigation Trust delivers a Notice of Objection
within such 30-day period with respect to such Bank United Certificate. Subject
to a Determination, the parties intend to treat a portion of each payment of the
Commitment Amount as interest to the extent such payment is treated as interest
under Section 483(a).

    (f) A Determination that a deduction is allowed for amounts paid to the
Trusts pursuant to Section 2.04 or for the fair market value of the CPR
Certificates issued to the Litigation Trustees pursuant to the Litigation
Trustee Agreements will be deemed to be made on the earlier of (i) the date of a
final judicial determination to such effect, binding upon BNKU (or its
successor), is made in the Litigation, (ii) the date a final agreement to which
Bank United is a party with the federal government to such effect is entered
into at the direction of the Litigation Trustees as part of the resolution of
the Litigation or a related IRS ruling to such effect issued to a member of the
Bank United Group in connection with such agreement (it being understood that
the Bank United Group shall be under no obligation to seek such a ruling or
refund or enter into such an agreement; provided that if requested the Bank
United Group will enter into such an agreement if such agreement does not impose
any liability or obligation whatsoever (other than a standard settlement release
relating only to the Litigation or other related claims that Bank United, BNKU
or Bank United's stockholders might have been able to bring as of immediately
prior to the Merger) on the Bank United Group or adversely affect or restrict
the conduct of its business or adversely affect its tax posture with respect to
other matters) and (iii) the effective date of a law, regulation or IRS ruling
to such effect that applies to Bank United or taxpayers generally.
Notwithstanding the foregoing, no such Determination shall be deemed to be made
unless it is made prior to the receipt by the Bank United Group of the
Litigation Proceeds.

    2.04  Payment of Expense Amounts.

    (a) The "Litigation Trust Expense Amount" means the estimated unpaid
expenses of the Litigation Trust (including without limitation the management
fees and expenses of the Litigation Trustees (as defined in the Litigation Trust
Agreement), the fees for the other trustees of the Litigation Trust, and
expenses relating to the Litigation) minus any amounts previously provided by
Bank United pursuant to Section 2.04 in excess of the actual expenses of the
Litigation Trust. From time to time, but no more often than quarterly, the
Litigation Trust shall submit to Bank United a written notice (the "Litigation
Expense Notice") detailing the Litigation Trust Expense Amount. Bank United may
object to the Litigation Trust's calculation of the Litigation Trust Expense
Amount by delivering a written objection to the Litigation Trust within 10 days
of its receipt of the Litigation Expense Notice, which notice shall specify in
reasonable detail the nature of such objection. If Bank United so objects, and
the parties cannot mutually resolve the dispute, then within 5 days of receipt
of Bank United's notice of objection, Bank United and the Litigation Trust shall
submit the Litigation Expense Notice, along with any supporting documentation
provided by either party, to a mutually agreed upon independent certified public
accountant (the "Expense Accountant"). The Expense Accountant shall be
instructed to determine as soon as is practicable whether the Litigation Trust
Expense Amount as estimated by the Litigation Trust is reasonable. If the
Expense Accountant determines (a) that the Litigation Trust Expense Amount as
estimated by the Litigation Trust is reasonable then the Litigation Trust's
estimate shall be binding on the parties hereto or (b) that the Litigation Trust
Expense Amount as estimated by the Litigation Trust is not reasonable then the
Expense Accountant shall estimate the Litigation Trust Expense Amount and the
Expense Accountant's estimate shall be binding on the parties hereto. Bank
United and the Litigation Trust shall bear equally the expenses of the Expense
Accountant in connection with the performance of its duties described herein.
Bank United shall deposit the Litigation Trust Expense Amount in an interest
bearing demand-deposit account as specified by the

                                      C-10
<PAGE>
Litigation Trustees in the name of the Litigation Trust at BNKU promptly upon
the resolution of any dispute pursuant to this paragraph, if any.

    (b) The "Payment Trust Expense Amount" means the estimated unpaid expenses
of the Payment Trust (including without limitation the fees for the trustees of
the Payment Trust) minus any amounts previously provided by Bank United in
excess of the actual expenses of the Payment Trust. From time to time but no
more often than monthly, the Payment Trust shall submit to Bank United a written
notice (the "Payment Trust Expense Notice") detailing the Payment Trust Expense
Amount. Bank United may object to the Litigation Trust's calculation of the
Payment Trust Expense Amount in the same manner described in Section 2.04(b) and
the parties will resolve the dispute and Bank United shall pay the Payment Trust
Expense Amount in the manner described in Section 2.04(b).

    (c) Notwithstanding the foregoing, the aggregate amount which Bank United
shall be obligated to pay under Section 2.04(a) and 2.04(b) for the life of the
Trusts shall not exceed the sum of $10,000,000, PROVIDED that in the event that
the Litigation is pursued through additional trial court proceedings and any
appeals related thereto, then Bank United shall be obligated to pay additional
expenses, PROVIDED FURTHER that in no event shall the aggregate amount which
Bank United shall be obligated to pay under Section 2.04(a) and 2.04(b) exceed
the sum of $13,000,000. Bank United agrees and acknowledges that any amounts
payable under Section 3(b) of the Litigation Trustee Agreement of Jonathon K.
Heffron are not subject to the limitation expressed in this Section 2.04(c).

    (d) In order to facilitate the prosecution of the Litigation in an efficient
manner and to minimize the likelihood of disputes with respect to determination
of the Litigation Trust Expense Amount, the Litigation Trustees agree to consult
in good faith with the Bank United Litigation Committee and to keep Bank United
reasonably informed with respect to the Litigation Trust Expense Amount.

    2.05  Ranking.  This Agreement shall rank pari passu with other senior
indebtedness of Bank United.

    2.06  Restrictions on Sale or Pledge of Stock of BNKU.

    (a) Bank United (i) shall not (a) sell, transfer or otherwise dispose of any
shares of any series of Voting Stock of BNKU or (b) permit BNKU to issue, sell
or otherwise dispose of shares of its Voting Stock unless in either case BNKU
remains a Controlled Subsidiary, and (ii) shall not permit BNKU to (a) merge or
consolidate unless the surviving entity is BNKU or a Controlled Subsidiary or
(b) convey or transfer its properties and assets substantially as an entirety to
any person, except to Bank United or a Controlled Subsidiary.

    (b) Bank United shall not create, assume, incur or suffer to exist, as
security for indebtedness for borrowed money, any mortgage, pledge, encumbrance,
lien or charge of any kind upon the Voting Stock of BNKU (other than directors'
qualifying shares) without effectively providing that the CPR Certificates shall
be secured equally and ratably with (or prior to) such indebtedness; provided,
however, that Bank United may create, assume, incur or suffer to exist any such
mortgage, pledge, encumbrance, lien or charge without regard to the foregoing
provisions so long as after giving effect thereto Bank United will own directly
or indirectly at least 80% of the Voting Stock of BNKU then issued and
outstanding, free and clear of any such mortgage, pledge, encumbrance, lien or
charge.

    (c) Notwithstanding the foregoing, Bank United may avoid the restrictions
described in the previous two paragraphs if prior to any such transaction BNKU
shall have unconditionally guaranteed payment when due of the Commitment Amount,
if any, BNKU shall have obtained all regulatory approvals, if any, required to
permit the guarantee of the payment of the Commitment Amount, and Bank United
shall have delivered to the institutional trustee for the Litigation Trust an
opinion of counsel stating that the guarantee of the payment of the Commitment
Amount by BNKU has been duly authorized, executed and delivered and constitutes
a valid, legally binding and enforceable obligation of BNKU.

                                      C-11
<PAGE>
    2.07  No Assignment of Claim.  Bank United will not, and will not permit
BNKU to, "assign" (within the meaning of 31 U.S.C. Sec. 3727) any interest in
the Litigation. The parties intend and acknowledge that any merger of Bank
United or BNKU with any other party shall not be deemed to be or to effect an
assignment (within the meaning of 31 U.S.C. Sec. 3727) of the Litigation.

    2.08  Return of Unused Funds.  Each of the Trusts shall, immediately prior
to its termination as provided by its governing documents and this Agreement,
shall refund to Bank United any amount provided to such Trust pursuant to
Section 2.04 but not used, provided that each of the Trusts may retain a
reasonable reserve of funds to pay for termination expenses.

                           ARTICLE III. MISCELLANEOUS

    3.01  Waiver; Amendment.  Any provision of this Agreement may be (i) waived
by the party benefited by the provision, or (ii) amended or modified at any
time, by an agreement in writing between the parties hereto executed in the same
manner as this Agreement.

    3.02  Counterparts.  This Commitment may be executed in one or more
counterparts, each of which shall be deemed to constitute an original.

    3.03  Governing Law.  This Commitment shall be governed by, and interpreted
in accordance with, the laws of the State of Delaware applicable to contracts
made and to be performed entirely within such State.

    3.04  Notices.  All notices, requests and other communications hereunder to
a party shall be in writing and shall be deemed given if personally delivered,
telecopied (with confirmation) or mailed by registered or certified mail (return
receipt requested) to Bank United at its address set forth in the Merger
Agreement with a copy sent to Washington Mutual, Inc. at its address set forth
in the Merger Agreement or to the Trusts their addresses set forth below or such
other address as such party may specify by notice to the other parties hereto.

    If to the Litigation Trust to:

       First Union Trust
       Company, National Association
       Rodney Square, Suite 102
       920 King Street
       Wilmington, Delaware 19801
       Attention:
       Facsimile:

    With copies to:

       c/o Bank United Corp.
       3200 Southwest Freeway
       Houston, Texas 77027
       Attention: Jonathon K. Heffron, Esq.
       Facsimile: (713) 543-7744

                                      C-12
<PAGE>
    If to the Payment Trust to:

       First Union Trust
       Company, National Association
       Rodney Square, Suite 102
       920 King Street
       Wilmington, Delaware 19801
       Attention:
       Facsimile:

    With copies to:

       c/o Bank United Corp.
       3200 Southwest Freeway
       Houston, Texas 77027
       Attention: Jonathon K. Heffron, Esq.
       Facsimile: (713) 543-7744

    3.05  Entire Understanding.  This Agreement and the Merger Agreement
represent the entire understanding of the parties hereto with reference to the
transactions contemplated hereby and thereby and this Agreement supersedes any
and all other oral or written agreements heretofore made except for the Merger
Agreement.

    3.06  No Third-Party Beneficiaries; Limitation on Liability.  Except as
provided below, nothing in this Agreement expressed or implied is intended to
confer upon any person, other than the parties hereto or their respective
successors, any rights, remedies, obligations or liabilities under or by reason
of this Agreement. The holders of the CPR Certificates, the Trusts and Trustees
shall have no rights to enforce, institute or maintain any suit, action or
proceeding against Bank United, BNKU, its affiliates, officers, directors,
employees or agents relating to the entering into of this Agreement, the
distribution of the CPR Certificates, the Litigation or the performance by the
Trustees of their duties as Trustees. Notwithstanding the foregoing, each of the
Trusts (or the Trustees on behalf of the each of the Trusts) may enforce,
institute or maintain a suit, action or proceeding against (i) Bank United for
breach of this Agreement, Litigation Trust Agreement, the Payment Trust
Agreement, or any Litigation Trustee Agreement, (ii) Bank United for failure to
deliver any CPR Certificate when due or to return to the Litigation Trust for
cancellation of any CPR Certificate required to be returned pursuant to the
Merger Agreement when so required, (iii) Bank United for failure to deposit from
time to time the amounts required pursuant to Section 2.04, or (v) BNKU for
breach of any depository relationship obligations it may have with respect to
the amounts paid by Bank United pursuant to Section 2.04.

    3.07  No Other Obligations.  Except as set forth in the Litigation Trust
Agreement, the Payment Trust Agreement, the Litigation Trustee Agreements, the
Merger Agreement or in this Agreement, Bank United shall have no other
obligations to the either of the Trusts, the Trustees or the holders of CPR
Certificates. Without limiting the generality of the foregoing and except as
provided in the Merger Agreement, the Litigation Trust Agreement, the Payment
Trust Agreement, the Litigation Trustee Agreements, or this Agreement, Bank
United shall have no obligation to advance funds to either of the Trusts, the
Trustees or the holders of CPR Certificates. Each of the Trusts hereby
acknowledge that it has no interest in any Litigation Proceeds received by the
Bank United Group except to the extent of the obligation of Bank United
hereunder to pay to the Litigation Trust or the Payment Trust, as the case may
be, the amount required to be paid pursuant to Section 2.01(a) or (b).

                                      C-13
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed in counterparts by their duly authorized officers, all as of the day
and year first above written.

<TABLE>
<S>                                               <C>
                                                  BANK UNITED CORP.

                                                  --------------------------------------------------
                                                  Name:
                                                  Title:

                                                  BANK UNITED LITIGATION CONTINGENT PAYMENT RIGHTS
                                                  TRUST

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Litigation Trustee

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Litigation Trustee

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Institutional Trustee

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Delaware Trustee

                                                  BANK UNITED LITIGATION PAYMENT TRUST

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Trustee

                                                  --------------------------------------------------
                                                  Name:
                                                  Title: Trustee
</TABLE>

                                      C-14


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