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                         _____________________________
                              AMENDED AND RESTATED

                                TRUST AGREEMENT

                                     AMONG

                     SOUTHWEST BANCORP, INC., AS DEPOSITOR

            STATE STREET BANK AND TRUST COMPANY, AS PROPERTY TRUSTEE

                 WILMINGTON TRUST COMPANY, AS DELAWARE TRUSTEE,

                                      AND

                    THE ADMINISTRATIVE TRUSTEES NAMED HEREIN

                            DATED AS OF JUNE 4, 1997

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                               TABLE OF CONTENTS



                                                                                                            PAGE
                                                                                                            ----    
                                                                                                      
ARTICLE I.               DEFINED TERMS...................................................................... 1
     SECTION 101.        DEFINITIONS........................................................................ 1

ARTICLE II.              ESTABLISHMENT OF THE TRUST......................................................... 7
     SECTION 201.        NAME............................................................................... 7
     SECTION 202.        OFFICE OF THE DELAWARE TRUSTEE; PRINCIPAL PLACE OF BUSINESS........................ 8
     SECTION 203.        INITIAL CONTRIBUTION OF TRUST PROPERTY; ORGANIZATIONAL EXPENSES.................... 8
     SECTION 204.        ISSUANCE OF THE PREFERRED SECURITIES............................................... 8
     SECTION 205.        ISSUANCE OF THE COMMON SECURITIES; SUBSCRIPTION AND PURCHASE OF DEBENTURES......... 8
     SECTION 206.        DECLARATION OF TRUST............................................................... 8
     SECTION 207.        AUTHORIZATION TO ENTER INTO CERTAIN TRANSACTIONS................................... 9
     SECTION 208.        ASSETS OF TRUST....................................................................11
     SECTION 209.        TITLE TO TRUST PROPERTY............................................................11

ARTICLE III.             PAYMENT ACCOUNT....................................................................11
     SECTION 301.        PAYMENT ACCOUNT....................................................................11

ARTICLE IV.              DISTRIBUTIONS; REDEMPTION..........................................................12
     SECTION 401.        DISTRIBUTIONS......................................................................12
     SECTION 402.        REDEMPTION.........................................................................12
     SECTION 403.        SUBORDINATION OF COMMON SECURITIES.................................................13
     SECTION 404.        PAYMENT PROCEDURES.................................................................14
     SECTION 405.        TAX RETURNS AND REPORTS............................................................14
     SECTION 406.        PAYMENT OF TAXES, DUTIES, ETC. OF THE TRUST........................................14
     SECTION 407.        PAYMENTS UNDER INDENTURE...........................................................14

ARTICLE V.               TRUST SECURITIES CERTIFICATES......................................................15
     SECTION 501.        INITIAL OWNERSHIP..................................................................15
     SECTION 502.        THE TRUST SECURITIES CERTIFICATES..................................................15
     SECTION 503.        EXECUTION, AUTHENTICATION AND DELIVERY OF TRUST SECURITIES CERTIFICATES............15
     SECTION 504.        REGISTRATION OF TRANSFER AND EXCHANGE OF PREFERRED SECURITIES CERTIFICATES.........15
     SECTION 505.        MUTILATED, DESTROYED, LOST OR STOLEN TRUST SECURITIES CERTIFICATES.................16
     SECTION 506.        PERSONS DEEMED SECURITYHOLDERS.....................................................16
     SECTION 507.        ACCESS TO LIST OF SECURITYHOLDERS' NAMES AND ADDRESSES.............................17
     SECTION 508.        MAINTENANCE OF OFFICE OR AGENCY....................................................17
     SECTION 509.        APPOINTMENT OF PAYING AGENT........................................................17
     SECTION 510.        OWNERSHIP OF COMMON SECURITIES BY DEPOSITOR........................................18
     SECTION 511.        PREFERRED SECURITIES CERTIFICATES..................................................18
 

                                      i

 


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     SECTION 512.        [Intentionally Omitted]............................................................18
     SECTION 513.        [Intentionally Omitted]............................................................18
     SECTION 514.        RIGHTS OF SECURITYHOLDERS..........................................................18

ARTICLE VI.              ACTS OF SECURITYHOLDERS; MEETINGS; VOTING..........................................19
     SECTION 601.        LIMITATIONS ON VOTING RIGHTS.......................................................19
     SECTION 602.        NOTICE OF MEETINGS.................................................................19
     SECTION 603.        MEETINGS OF PREFERRED SECURITYHOLDERS..............................................19
     SECTION 604.        VOTING RIGHTS......................................................................20
     SECTION 605.        PROXIES, ETC.......................................................................20
     SECTION 606.        SECURITYHOLDER ACTION BY WRITTEN CONSENT...........................................20
     SECTION 607.        RECORD DATE FOR VOTING AND OTHER PURPOSES..........................................20
     SECTION 608.        ACTS OF SECURITYHOLDERS............................................................21
     SECTION 609.        INSPECTION OF RECORDS..............................................................21

ARTICLE VII.             REPRESENTATIONS AND WARRANTIES.....................................................22
     SECTION 701.        REPRESENTATIONS AND WARRANTIES OF THE BANK AND THE PROPERTY TRUSTEE................22
     SECTION 702.        REPRESENTATIONS AND WARRANTIES OF THE DELAWARE BANK AND THE DELAWARE TRUSTEE.......22
     SECTION 703.        REPRESENTATIONS AND WARRANTIES OF DEPOSITOR........................................23

ARTICLE VIII.            TRUSTEES...........................................................................24
     SECTION 801.        CERTAIN DUTIES AND RESPONSIBILITIES................................................24
     SECTION 802.        CERTAIN NOTICES....................................................................25
     SECTION 803.        CERTAIN RIGHTS OF PROPERTY TRUSTEE.................................................25
     SECTION 804.        NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES.............................27
     SECTION 805.        MAY HOLD SECURITIES................................................................27
     SECTION 806.        COMPENSATION; INDEMNITY; FEES......................................................27
     SECTION 807.        CORPORATE PROPERTY TRUSTEE REQUIRED; ELIGIBILITY OF TRUSTEES.......................27
     SECTION 808.        CONFLICTING INTERESTS..............................................................28
     SECTION 809.        CO-TRUSTEES AND SEPARATE TRUSTEE...................................................28
     SECTION 810.        RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR..................................29
     SECTION 811.        ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.............................................30
     SECTION 812.        MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS........................30
     SECTION 813.        PREFERENTIAL COLLECTION OF CLAIMS AGAINST DEPOSITOR OR TRUST.......................30
     SECTION 814.        REPORTS BY PROPERTY TRUSTEE........................................................31
     SECTION 815.        REPORTS TO THE PROPERTY TRUSTEE....................................................31
     SECTION 816.        EVIDENCE OF COMPLIANCE WITH CONDITIONS PRECEDENT...................................31
     SECTION 817.        NUMBER OF TRUSTEES.................................................................31
     SECTION 818.        DELEGATION OF POWER................................................................31
     SECTION 819.        VOTING.............................................................................32

ARTICLE IX.              TERMINATION, LIQUIDATION AND MERGER................................................32
     SECTION 901         TERMINATION UPON EXPIRATION DATE...................................................32
     SECTION 902.        EARLY TERMINATION..................................................................32
 

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     SECTION 903.        TERMINATION........................................................................32
     SECTION 904.        LIQUIDATION........................................................................33
     SECTION 905.        MERGERS, CONSOLIDATIONS, AMALGAMATIONS OR REPLACEMENTS OF THE TRUST................34

ARTICLE X.               MISCELLANEOUS PROVISIONS...........................................................34
     SECTION 1001.       LIMITATION OF RIGHTS OF SECURITYHOLDERS............................................34
     SECTION 1002.       AMENDMENT..........................................................................34
     SECTION 1003.       SEPARABILITY.......................................................................35
     SECTION 1004.       GOVERNING LAW......................................................................36
     SECTION 1005.       PAYMENTS DUE ON NON-BUSINESS DAY...................................................36
     SECTION 1006.       SUCCESSORS.........................................................................36
     SECTION 1007.       HEADINGS...........................................................................36
     SECTION 1008.       REPORTS, NOTICES AND DEMANDS.......................................................36
     SECTION 1009.       AGREEMENT NOT TO PETITION..........................................................37
     SECTION 1010.       TRUST INDENTURE ACT; CONFLICT WITH TRUST INDENTURE ACT.............................37
     SECTION 1011.       ACCEPTANCE OF TERMS OF TRUST AGREEMENT, GUARANTEE AND INDENTURE....................38

                                     iii

 
                             CROSS-REFERENCE TABLE



Section of                                      Section of Amended
Trust Indenture Act                                   and Restated
of 1939, as amended                                Trust Agreement
- -------------------                                ---------------
 
                                                          
310(a)(1)....................................                  807
310(a)(2)....................................                  807
310(a)(3)....................................                  807
310(a)(4)....................................           207(a)(ii)
310(b).......................................                  808
311(a).......................................                  813
311(b).......................................                  813
312(a).......................................                  507
312(b).......................................                  507
312(c).......................................                  507
313(a).......................................               814(a)
313(a)(4)....................................               814(b)
313(b).......................................               814(b)
313(c).......................................                 1008
313(d).......................................               814(c)
314(a).......................................                  815
314(b).......................................       Not Applicable
314(c)(1)....................................                  816
314(c)(2)....................................                  816
314(c)(3)....................................       Not Applicable
314(d).......................................       Not Applicable
314(e).......................................             101, 816
315(a).......................................       801(a), 803(a)
315(b).......................................            802, 1008
315(c).......................................               801(a)
315(d).......................................             801, 803
316(a)(2)....................................       Not Applicable
316(b).......................................       Not Applicable
316(c).......................................                  607
317(a)(1)....................................       Not Applicable
317(a)(2)....................................       Not Applicable
317(b).......................................                  509
318(a).......................................                 1010

Note: This Cross-Reference Table does not constitute part of this Agreement and
      shall not affect any interpretation of any of its terms or provisions.

                                      iv

 
                      AMENDED AND RESTATED TRUST AGREEMENT

  AMENDED AND RESTATED TRUST AGREEMENT, dated as of June 4, 1997, among (i)
SOUTHWEST BANCORP, INC., an Oklahoma corporation (including any successors or
assigns, the "Depositor"), (ii) STATE STREET BANK AND TRUST COMPANY, a trust
company duly organized and existing under the laws of the Commonwealth of
Massachusetts, as property trustee (the "Property Trustee" and, in its separate
corporate capacity and not in its capacity as Property Trustee, the "Bank"),
(iii) WILMINGTON TRUST COMPANY, a Delaware banking corporation duly organized
and existing under the laws of the State of Delaware, as Delaware trustee (the
"Delaware Trustee," and, in its separate corporate capacity and not in its
capacity as Delaware Trustee, the "Delaware Bank") (iv) Robert L. McCormick,
Jr., an individual, Kerby E. Crowell, an individual, and Deborah T. Bradley, an
individual, each of whose address is c/o Southwest Bancorp, Inc., 608 South Main
Street, Stillwater, Oklahoma 74074 (each an "Administrative Trustee" and
collectively the "Administrative Trustees") (the Property Trustee, the Delaware
Trustee and the Administrative Trustees referred to collectively as the
"Trustees"), and (v) the several Holders (as hereinafter defined).

                                    RECITALS

  WHEREAS, the Depositor, the Delaware Trustee, and Robert L. McCormick, Jr.,
Kerby E. Crowell and Deborah T. Bradley, each as an Administrative Trustee, have
heretofore duly declared and established a business trust pursuant to the
Delaware Business Trust Act (as hereinafter defined) by the entering into of
that certain Trust Agreement, dated as of May 8, 1997 (the "Original Trust
Agreement"), and by the execution and filing by the Delaware Trustee, the
Depositor and the Administrative Trustees with the Secretary of State of the
State of Delaware of the Certificate of Trust, filed on May 9, 1997, the form of
which is attached as Exhibit A; and

  WHEREAS, the Depositor, the Delaware Trustee, the Property Trustee and the
Administrative Trustees desire to amend and restate the Original Trust Agreement
in its entirety as set forth herein to provide for, among other things, (i) the
issuance of the Common Securities (as defined herein) by the Trust (as defined
herein) to the Depositor; (ii) the issuance and sale of the Preferred Securities
(as defined herein) by the Trust pursuant to the Underwriting Agreement (as
defined herein); (iii) the acquisition by the Trust from the Depositor of all of
the right, title and interest in the Debentures (as defined herein); and (iv)
the appointment of the Trustees;

  NOW THEREFORE, in consideration of the agreements and obligations set forth
herein and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, each party, for the benefit of the
other parties and for the benefit of the Securityholders (as defined herein),
hereby amends and restates the Original Trust Agreement in its entirety and
agrees as follows:

                                   ARTICLE I

                                 DEFINED TERMS

 SECTION 101.  DEFINITIONS.

  For all purposes of this Trust Agreement, except as otherwise expressly
provided or unless the context otherwise requires:

  (a) the terms defined in this Article I have the meanings assigned to them in
this Article I and include the plural as well as the singular;

  (b) all other terms used herein that are defined in the Trust Indenture Act,
either directly or by reference therein, have the meanings assigned to them
therein;

                                      1

 
  (c) unless the context otherwise requires, any reference to an "Article" or a
"Section" refers to an Article or a Section, as the case may be, of this Trust
Agreement; and

  (d) the words "herein", "hereof" and "hereunder" and other words of similar
import refer to this Trust Agreement as a whole and not to any particular
Article, Section or other subdivision.

  "Act" has the meaning specified in Section 608.

  "Additional Amount" means, with respect to Trust Securities of a given
Liquidation Amount and/or a given period, the amount of additional interest
accrued on interest in arrears and paid by the Depositor on a Like Amount of
Debentures for such period.

  "Additional Interest" has the meaning specified in Section 1.1 of the
Indenture.

  "Administrative Trustee" means each of Robert L. McCormick, Jr., Kerby E.
Crowell and Deborah T. Bradley, solely in his capacity as Administrative Trustee
of the Trust formed and continued hereunder and not in his individual capacity,
or such Administrative Trustee's successor in interest in such capacity, or any
successor trustee appointed as herein provided.

  "Affiliate" means, with respect to a specified Person, (a) any Person directly
or indirectly owning, controlling or holding with power to vote 10% or more of
the outstanding voting securities or other ownership interests of the specified
Person, any Person 10% or more of whose outstanding voting securities or other
ownership interests are directly or indirectly owned, controlled or held with
power to vote by the specified Person; (c) any Person directly or indirectly
controlling, controlled by, or under common control with the specified Person;
(d) a partnership in which the specified Person is a general partner; (e) any
officer or director of the specified Person; and (f) if the specified Person is
an individual, any entity of which the specified Person is an officer, director
or general partner.

  "Authenticating Agent" means an authenticating agent with respect to the
Preferred Securities appointed by the Property Trustee pursuant to Section 503.

  "Bank" has the meaning specified in the Preamble to this Trust Agreement.

  "Bankruptcy Event" means, with respect to any Person:

  (a) the entry of a decree or order by a court having jurisdiction in the
premises adjudging such Person a bankrupt or insolvent, or approving as properly
filed a petition seeking liquidation or reorganization of or in respect of such
Person under the United States Bankruptcy Code of 1978, as amended, or any other
similar applicable federal or state law, and the continuance of any such decree
or order unvacated and unstayed for a period of 90 days; or the commencement of
an involuntary case under the United States Bankruptcy Code of 1978, as amended,
in respect of such Person, which shall continue undismissed for a period of 90
days or entry of an order for relief in such case; or the entry of a decree or
order of a court having jurisdiction in the premises for the appointment on the
ground of insolvency or bankruptcy of a receiver, custodian, liquidator, trustee
or assignee in bankruptcy or insolvency of such Person or of its property, or
for the winding up or liquidation of its affairs, and such decree or order shall
have remained in force unvacated and unstayed for a period of 90 days; or

  (b) the institution by such Person of proceedings to be adjudicated a
voluntary bankrupt, or the consent by such Person to the filing of a bankruptcy
proceeding against it, or the filing by such Person of a petition or answer or
consent seeking liquidation or reorganization under the United States Bankruptcy
Code of 1978, as amended, or other similar applicable Federal or State law, or
the consent by such Person to the filing of any such petition or to the
appointment on the ground of insolvency or bankruptcy of a receiver or custodian
or liquidator or trustee or assignee in bankruptcy or insolvency of such Person
or of its property, or shall make a general assignment for the benefit of
creditors.

                                      2

 
  "Bankruptcy Laws" has the meaning specified in Section 1009.

  "Board Resolution" means a copy of a resolution certified by the Secretary or
an Assistant Secretary of the Depositor to have been duly adopted by the
Depositor's Board of Directors, or such committee of the Board of Directors or
officers of the Depositor to which authority to act on behalf of the Board of
Directors has been delegated, and to be in full force and effect on the date of
such certification, and delivered to the appropriate Trustee.

  "Business Day" means a day other than a Saturday or Sunday, a day on which
banking institutions in the City of New York are authorized or required by law,
executive order or regulation to remain closed, or a day on which the Property
Trustee's Corporate Trust Office or the Corporate Trust Office of the Debenture
Trustee is closed for business.

  "Certificate of Trust" means the certificate of trust filed with the Secretary
of State of the State of Delaware with respect to the Trust, as amended or
restated from time to time.

  "Closing Date" means the date of execution and delivery of this Trust
Agreement.

  "Code" means the Internal Revenue Code of 1986, as amended.

  "Commission" means the Securities and Exchange Commission, as from time to
time constituted, created under the Exchange Act, or, if at any time after the
execution of this instrument such Commission is not existing and performing the
duties now assigned to it under the Trust Indenture Act, then the body
performing such duties at such time.

  "Common Security" means an undivided beneficial interest in the assets of the
Trust, having a Liquidation Amount of $25 and having the rights provided
therefor in this Trust Agreement, including the right to receive Distributions
and a Liquidation Distribution as provided herein.

  "Common Securities Certificate" means a certificate evidencing ownership of
Common Securities, substantially in the form attached as Exhibit C.

  "Corporate Trust Office" means the office at which, at any particular time,
the corporate trust business of the Property Trustee or the Debenture Trustee,
as the case may be, shall be principally administered, which office at the date
hereof, in each such case, is located at Two International Place, 4th Floor,
Boston, Massachusetts 02110, Attention: Corporate Trust Department.

  "Debenture Event of Default" means an "Event of Default" as defined in Section
7.1 of the Indenture.

  "Debenture Redemption Date" means, with respect to any Debentures to be
redeemed under the Indenture, the date fixed for redemption under the Indenture.

  "Debenture Trustee" means State Street Bank and Trust Company, a banking
corporation company organized under the laws of the Commonwealth of
Massachusetts and any successor thereto, as trustee under the Indenture.

  "Debentures" means the $25,786,500 aggregate principal amount of the
Depositor's 9.30% Subordinated Debentures due 2027, issued pursuant to the
Indenture.

  "Delaware Bank" has the meaning specified in the Preamble to this Trust
Agreement.

  "Delaware Business Trust Act" means Chapter 38 of Title 12 of the Delaware
Code, 12 Delaware Code Sections 3801 et seq. as it may be amended from time to
time.

                                      3

 
  "Delaware Trustee" means the commercial bank or trust company identified as
the "Delaware Trustee" in the Preamble to this Trust Agreement solely in its
capacity as Delaware Trustee of the Trust formed and continued hereunder and not
in its individual capacity, or its successor in interest in such capacity, or
any successor trustee appointed as herein provided.

  "Depositor" has the meaning specified in the Preamble to this Trust Agreement.

  "Distribution Date" has the meaning specified in Section 401(a).

  "Distributions" means amounts payable in respect of the Trust Securities as
provided in Section 401.

  "Early Termination Event" has the meaning specified in Section 902.

  "Event of Default" means any one of the following events (whatever the reason
for such Event of Default and whether it shall be voluntary or involuntary or be
effected by operation of law or pursuant to any judgment, decree or order of any
court or any order, rule or regulation of any administrative or governmental
body):

  (a) the occurrence of a Debenture Event of Default; or

  (b) default by the Trust or the Property Trustee in the payment of any
Distribution when it becomes due and payable, and continuation of such default
for a period of 30 days; or

  (c) default by the Trust or the Property Trustee in the payment of any
Redemption Price of any Trust Security when it becomes due and payable; or

  (d) default in the performance, or breach, in any material respect, of any
covenant or warranty of the Trustees in this Trust Agreement (other than a
covenant or warranty a default in the performance of which or the breach of
which is dealt with in clause (b) or (c), above) and continuation of such
default or breach for a period of 60 days after there has been given, by
registered or certified mail, to the defaulting Trustee or Trustees by the
Holders of at least 25% in aggregate Liquidation Amount of the Outstanding
Preferred Securities a written notice specifying such default or breach and
requiring it to be remedied and stating that such notice is a "Notice of
Default" hereunder; or

  (e) the occurrence of a Bankruptcy Event with respect to the Property Trustee
and the failure by the Depositor to appoint a successor Property Trustee within
60 days thereof.

  "Exchange Act" means the Securities Exchange Act of 1934, as amended.

  "Expense Agreement" means the Agreement as to Expenses and Liabilities between
the Depositor and the Trust, substantially in the form attached as Exhibit D, as
amended from time to time.

  "Expiration Date" has the meaning specified in Section 901.

  "Extended Interest Payment Period" has the meaning specified in Section 4.1 of
the Indenture.

  "Guarantee" means the Preferred Securities Guarantee Agreement executed and
delivered by the Depositor and State Street Bank and Trust Company, as trustee,
contemporaneously with the execution and delivery of this Trust Agreement, for
the benefit of the holders of the Preferred Securities, as amended from time to
time.

  "Indenture" means the Indenture, dated as of June 4, 1997, between the
Depositor and the Debenture Trustee, as trustee, as amended or supplemented from
time to time pertaining to the Debentures of the Depositor.

                                      4

 
  "Investment Company Act," means the Investment Company Act of 1940, as
amended, as in effect at the date of execution of this instrument.

  "Lien" means any lien, pledge, charge, encumbrance, mortgage, deed of trust,
adverse ownership interest, hypothecation, assignment, security interest or
preference, priority or other security agreement or preferential arrangement of
any kind or nature whatsoever.

  "Like Amount" means (a) with respect to a redemption of Trust Securities,
Trust Securities having a Liquidation Amount equal to the principal amount of
Debentures to be contemporaneously redeemed in accordance with the Indenture and
the proceeds of which shall be used to pay the Redemption Price of such Trust
Securities; and (b) with respect to a distribution of Debentures to Holders of
Trust Securities in connection with a termination or liquidation of the Trust,
Debentures having a principal amount equal to the Liquidation Amount of the
Trust Securities of the Holder to whom such Debentures are distributed. Each
Debenture distributed pursuant to clause (b) above shall carry with it
accumulated interest in an amount equal to the accumulated and unpaid interest
then due on such Debenture.

  "Liquidation Amount" means the stated amount of $25 per Trust Security.

  "Liquidation Date" means the date on which Debentures are to be distributed to
Holders of Trust Securities in connection with a termination and liquidation of
the Trust pursuant to Section 904(a).

  "Liquidation Distribution" has the meaning specified in Section 904(d).

  "Officers' Certificate" means a certificate signed by the President or a Vice
President and by the Treasurer or an Assistant Treasurer or the Controller or an
Assistant Controller or the Secretary or an Assistant Secretary, of the
Depositor, and delivered to the appropriate Trustee. One of the officers signing
an Officers' Certificate given pursuant to Section 816 shall be the principal
executive, financial or accounting officer of the Depositor. Any Officers'
Certificate delivered with respect to compliance with a condition or covenant
provided for in this Trust Agreement shall include:

  (a) a statement that each officer signing the Officers' Certificate has read
the covenant or condition and the definitions relating thereto;

  (b) a brief statement of the nature and scope of the examination or
investigation undertaken by each officer in rendering the Officers' Certificate;

  (c) a statement that each such officer has made such examination or
investigation as, in such officer's opinion, is necessary to enable such officer
to express an informed opinion as to whether or not such covenant or condition
has been complied with; and

  (d) a statement as to whether, in the opinion of each such officer, such
condition or covenant has been complied with.

  "Opinion of Counsel" means an opinion in writing of legal counsel, who may be
counsel for the Trust, the Property Trustee, the Delaware Trustee or the
Depositor, but not an employee of any thereof, and who shall be reasonably
acceptable to the Property Trustee.

  "Original Trust Agreement" has the meaning specified in the Recitals to this
Trust Agreement.

  "Outstanding", when used with respect to Preferred Securities, means, as of
the date of determination, all Preferred Securities theretofore executed and
delivered under this Trust Agreement, except:

                                      5

 
  (a) Preferred Securities theretofore canceled by the Property Trustee or
delivered to the Property Trustee for cancellation;

  (b) Preferred Securities for whose payment or redemption money in the
necessary amount has been theretofore deposited with the Property Trustee or any
Paying Agent for the Holders of such Preferred Securities; provided that, if
such Preferred Securities are to be redeemed, notice of such redemption has been
duly given pursuant to this Trust Agreement; and

  (c) Preferred Securities which have been paid or in exchange for or in lieu of
which other Preferred Securities have been executed and delivered pursuant to
Sections 504, 505 and 511; provided, however, that in determining whether the
Holders of the requisite Liquidation Amount of the Outstanding Preferred
Securities have given any request, demand, authorization, direction, notice,
consent or waiver hereunder, Preferred Securities owned by the Depositor, any
Trustee or any Affiliate of the Depositor or any Trustee shall be disregarded
and deemed not to be Outstanding, except that (a) in determining whether any
Trustee shall be protected in relying upon any such request, demand,
authorization, direction, notice, consent or waiver, only Preferred Securities
that such Trustee knows to be so owned shall be so disregarded; and (b) the
foregoing shall not apply at any time when all of the outstanding Preferred
Securities are owned by the Depositor, one or more of the Trustees and/or any
such Affiliate. Preferred Securities so owned which have been pledged in good
faith may be regarded as Outstanding if the pledgee establishes to the
satisfaction of the Administrative Trustees the pledgee's right so to act with
respect to such Preferred Securities and the Pledgee is not the Depositor or any
other Obligor upon the Preferred Securities or a Person directly or indirectly
controlling or controlled by or under direct or indirect common control with the
Depositor or any Affiliate of the Depositor.

  "Paying Agent" means any paying agent or co-paying agent appointed pursuant to
Section 509 and shall initially be the Bank.

  "Payment Account" means a segregated non-interest-bearing corporate trust
account maintained by the Property Trustee with the Bank in its trust department
for the benefit of the Securityholders in which all amounts paid in respect of
the Debentures shall be held and from which the Property Trustee shall make
payments to the Securityholders in accordance with Sections 401 and 402.

  "Person" means any individual, corporation, partnership, joint venture, trust,
limited liability company or corporation, unincorporated organization or
government or any agency or political subdivision thereof.

  "Preferred Security" means an undivided beneficial interest in the assets of
the Trust, having a Liquidation Amount of $25 and having the rights provided
therefor in this Trust Agreement, including the right to receive Distributions
and a Liquidation Distribution as provided herein.

  "Preferred Securities Certificate", means a certificate evidencing ownership
of Preferred Securities, substantially in the form attached as Exhibit E.

  "Property Trustee" means the commercial bank or trust company identified as
the "Property Trustee," in the Preamble to this Trust Agreement solely in its
capacity as Property Trustee of the Trust heretofore formed and continued
hereunder and not in its individual capacity, or its successor in interest in
such capacity, or any successor property trustee appointed as herein provided.

  "Redemption Date" means, with respect to any Trust Security to be redeemed,
the date fixed for such redemption by or pursuant to this Trust Agreement;
provided that each Debenture Redemption Date and the stated maturity of the
Debentures shall be a Redemption Date for a Like Amount of Trust Securities.

  "Redemption Price" means, with respect to any Trust Security, the Liquidation
Amount of such Trust Security, plus accumulated and unpaid Distributions to the
Redemption Date, paid by the Depositor upon the concurrent

                                      6

 
redemption of a Like Amount of Debentures, allocated on a pro rata basis (based
on Liquidation Amounts) among the Trust Securities.

  "Relevant Trustee" shall have the meaning specified in Section 810.

  "Securities Register" and "Securities Registrar" have the respective meanings
specified in Section 504.

  "Securityholder" or "Holder" means a Person in whose name a Trust Security or
Securities is registered in the Securities Register; any such Person is a
beneficial owner within the meaning of the Delaware Business Trust Act.

  "Trust" means the Delaware business trust created and continued hereby and
identified on the cover page to this Trust Agreement.

  "Trust Agreement" means this Amended and Restated Trust Agreement, as the same
may be modified, amended or supplemented in accordance with the applicable
provisions hereof, including all exhibits hereto, including, for all purposes of
this Trust Agreement and any such modification, amendment or supplement, the
provisions of the Trust Indenture Act that are deemed to be a part of and govern
this Trust Agreement and any such modification, amendment or supplement,
respectively.

  "Trust Indenture Act" means the Trust Indenture Act of 1939, as amended, as in
force at the date as of which this instrument was executed; provided, however,
that in the event the Trust Indenture Act of 1939, as amended, is amended after
such date, "Trust Indenture Act" means, to the extent required by any such
amendment, the Trust Indenture Act of 1939 as so amended.

  "Trust Property" means (a) the Debentures; (b) the rights of the Property
Trustee under the Guarantee; (c) any cash on deposit in, or owing to, the
Payment Account; and (d) all proceeds and rights in respect of the foregoing and
any other property and assets for the time being held or deemed to be held by
the Property Trustee pursuant to the trusts of this Trust Agreement.

  "Trust Security" means any one of the Common Securities or the Preferred
Securities.

  "Trust Securities Certificate" means any one of the Common Securities
Certificates or the Preferred Securities Certificates.

  "Trustees" means, collectively, the Property Trustee, the Delaware Trustee and
the Administrative Trustees.

  "Underwriting Agreement" means the Underwriting Agreement, dated as of May 29,
1997, among the Trust, the Depositor and the Underwriters named therein.

                                   ARTICLE II

                           ESTABLISHMENT OF THE TRUST

 SECTION 201. NAME.

  The Trust created and continued hereby shall be known as "SBI Capital Trust,"
as such name may be modified from time to time by the Administrative Trustees
following written notice to the Holders of Trust Securities and the other
Trustees, in which name the Trustees may engage in the transactions contemplated
hereby, make and execute contracts and other instruments on behalf of the Trust
and sue and be sued.

                                      7

 
 SECTION 202.  OFFICE OF THE DELAWARE TRUSTEE; PRINCIPAL PLACE OF BUSINESS.

  The address of the Delaware Trustee in the State of Delaware is c/o Wilmington
Trust Company, Rodney Square North, 1100 North Market Street, Wilmington,
Delaware 19890-0001, Attention: Corporate Trust Administration, or such other
address in the State of Delaware as the Delaware Trustee may designate by
written notice to the Securityholders and the Depositor. The principal executive
office of the Trust is 608 South Main Street, Stillwater, Oklahoma, 74074.

 SECTION 203.  INITIAL CONTRIBUTION OF TRUST PROPERTY; ORGANIZATIONAL EXPENSES.

  The Trustees acknowledge receipt in trust from the Depositor in connection
with the Original Trust Agreement of the sum of $10, which constituted the
initial Trust Property. The Depositor shall pay organizational expenses of the
Trust as they arise or shall, upon request of any Trustee, promptly reimburse
such Trustee for any such expenses paid by such Trustee. The Depositor shall
make no claim upon the Trust Property for the payment of such expenses.

 SECTION 204.  ISSUANCE OF THE PREFERRED SECURITIES.

  On May 29, 1997, the Depositor and an Administrative Trustee, on behalf of the
Trust and pursuant to the Original Trust Agreement, executed and delivered the
Underwriting Agreement. Contemporaneously with the execution and delivery of
this Trust Agreement, an Administrative Trustee, on behalf of the Trust, shall
execute in accordance with Section 502 and deliver in accordance with the
Underwriting Agreement, Preferred Securities Certificates, registered in the
name of the Persons entitled thereto, in an aggregate amount of 1,000,500
Preferred Securities (including exercise of the underwriter's Option) having an
aggregate Liquidation Amount of $25,012,500 against receipt of the aggregate
purchase price of such Preferred Securities of $25,012,500, which amount such
Administrative Trustee shall promptly deliver to the Property Trustee.

 SECTION 205. ISSUANCE OF THE COMMON SECURITIES; SUBSCRIPTION AND PURCHASE OF
DEBENTURES.

     Contemporaneously with the execution and delivery of this Trust Agreement,
an Administrative Trustee, on behalf of the Trust, shall execute in accordance
with Section 502 and deliver to the Depositor, Common Securities Certificates,
registered in the name of the Depositor, in an aggregate amount of 30,960 Common
Securities having an aggregate Liquidation Amount of $774,000 against payment by
the Depositor of such amount. Contemporaneously therewith, an Administrative
Trustee, on behalf of the Trust, shall subscribe to and purchase from the
Depositor Debentures, registered in the name of the Property Trustee on behalf
of the Trust and having an aggregate principal amount equal to $774,000, and, in
satisfaction of the purchase price for such Debentures, the Property Trustee, on
behalf of the Trust, shall deliver to the Depositor the sum of $774,000.

 SECTION 206.  DECLARATION OF TRUST.

  The exclusive purposes and functions of the Trust are (a) to issue and sell
Trust Securities and use the proceeds from such sale to acquire the Debentures;
and (b) to engage in those activities necessary, convenient or incidental
thereto. The Depositor hereby appoints the Trustees as trustees of the Trust, to
have all the rights, powers and duties to the extent set forth herein, and the
Trustees hereby accept such appointment. The Property Trustee hereby declares
that it shall hold the Trust Property in trust upon and subject to the
conditions set forth herein for the benefit of the Securityholders. The
Administrative Trustees shall have all rights, powers and duties set forth
herein and in accordance with applicable law with respect to accomplishing the
purposes of the Trust. The Delaware Trustee shall not be entitled to exercise
any powers, nor shall the Delaware Trustee have any of the duties and
responsibilities, of the Property Trustee or the Administrative Trustees set
forth herein. The Delaware Trustee shall be one of the Trustees of the Trust for
the sole and limited purpose of fulfilling the requirements of Section 3807 of
the Delaware Business Trust Act.

                                      8

 
 SECTION 207.  AUTHORIZATION TO ENTER INTO CERTAIN TRANSACTIONS.

  (a) The Trustees shall conduct the affairs of the Trust in accordance with the
terms of this Trust Agreement. Subject to the limitations set forth in paragraph
(b) of this Section 207 and Article VIII, and in accordance with the following
provisions (i) and (ii), the Administrative Trustees shall have the authority to
enter into all transactions and agreements determined by the Administrative
Trustees to be appropriate in exercising the authority, express or implied,
otherwise granted to the Administrative Trustees under this Trust Agreement, and
to perform all acts in furtherance thereof, including without limitation, the
following:

     (i) As among the Trustees, each Administrative Trustee, acting singly or
jointly, shall have the power and authority to act on behalf of the Trust with
respect to the following matters:

      (A) the issuance and sale of the Trust Securities;

      (B) to cause the Trust to enter into, and to execute, deliver and perform
on behalf of the Trust, the Expense Agreement and such other agreements or
documents as may be necessary or desirable in connection with the purposes and
function of the Trust;

      (C) assisting in the registration of the Preferred Securities under the
Securities Act of 1933, as amended, and under state securities or blue sky laws,
and the qualification of this Trust Agreement as a trust indenture under the
Trust Indenture Act;

      (D) assisting in the listing of the Preferred Securities upon The Nasdaq
Stock Market's National Market or such securities exchange or exchanges as shall
be determined by the Depositor and the registration of the Preferred Securities
under the Exchange Act, and the preparation and filing of all periodic and other
reports and other documents pursuant to the foregoing;

      (E) the sending of notices (other than notices of default) and other
information regarding the Trust Securities and the Debentures to the
Securityholders in accordance with this Trust Agreement;

      (F) the appointment of a Paying Agent, Authenticating Agent and Securities
Registrar in accordance with this Trust Agreement;

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

      (H) to take all action that may be necessary or appropriate for the
preservation and the continuation of the 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 of the Preferred
Securities or to enable the Trust to effect the purposes for which the Trust was
created; and

      (I) the taking of any action incidental to the foregoing as the
Administrative Trustees may from time to time determine is necessary or
advisable to give effect to the terms of this Trust Agreement for the benefit of
the Securityholders (without consideration of the effect of any such action on
any particular Securityholder).

     (ii) As among the Trustees, the Property Trustee shall have the power, duty
and authority to act on behalf of the Trust with respect to the following
matters:

      (A) the establishment of the Payment Account;

      (B) the receipt of the Debentures;

                                      9

 
      (C) the collection of interest, principal and any other payments made in
respect of the Debentures in the Payment Account;

      (D) the distribution of amounts owed to the Securityholders in respect of
the Trust Securities in accordance with the terms of this Trust Agreement;

      (E) the exercise of all of the rights, powers and privileges of a holder
of the Debentures;

      (F) the sending of notices of default and other information regarding the
Trust Securities and the Debentures to the Securityholders in accordance with
this Trust Agreement;

      (G) the distribution of the Trust Property in accordance with the terms of
this Trust Agreement;

      (H) to the extent provided in this Trust Agreement, the winding up of the
affairs of and liquidation of the Trust;

      (I) after an Event of Default, the taking of any action incidental to the
foregoing as the Property Trustee may from time to time determine is necessary
or advisable to give effect to the terms of this Trust Agreement and protect and
conserve the Trust Property for the benefit of the Securityholders (without
consideration of the effect of any such action on any particular
Securityholder);

      (J) registering transfers of the Trust Securities in accordance with this
Trust Agreement; and

      (K) except as otherwise provided in this Section 207(a)(ii), the Property
Trustee shall have none of the duties, liabilities, powers or the authority of
the Administrative Trustees set forth in Section 207(a)(i).

  (b) So long as this Trust Agreement remains in effect, the Trust (or the
Trustees acting on behalf of the Trust) shall not undertake any business,
activities or transaction except as expressly provided herein or contemplated
hereby. In particular, the Trustees shall not (i) acquire any investments or
engage in any activities not authorized by this Trust Agreement; (ii) sell,
assign, transfer, exchange, mortgage, pledge, set-off or otherwise dispose of
any of the Trust Property or interests therein, including to Securityholders,
except as expressly provided herein; (iii) take any action that would cause the
Trust to fail or cease to qualify as a "grantor trust" for United States federal
income tax purposes; (iv) incur any indebtedness for borrowed money or issue any
other debt; or (v) take or consent to any action that would result in the
placement of a Lien on any of the Trust Property. The Administrative Trustees
shall defend all claims and demands of all Persons at any time claiming any Lien
on any of the Trust Property adverse to the interest of the Trust or the
Securityholders in their capacity as Securityholders.

  (c) In connection with the issue and sale of the Preferred Securities, the
Depositor shall have the right and responsibility to assist the Trust with
respect to, or effect on behalf of the Trust, the following (and any actions
taken by the Depositor in furtherance of the following prior to the date of this
Trust Agreement are hereby ratified and confirmed in all respects):

     (i) the preparation and filing by the Trust with the Commission and the
execution on behalf of the Trust of a registration statement on the appropriate
form in relation to the Preferred Securities and the Debentures, including any
amendments thereto;

     (ii) the determination of the States in which to take appropriate action to
qualify or, register for sale all or part of the Preferred Securities and to do
any and all such acts, other than actions which must be taken by or on behalf of
the Trust, and advise the Trustees of actions they must take on behalf of the
Trust, and prepare for execution and filing any documents to be executed and
filed by the Trust or on behalf of the Trust, as the Depositor deems necessary
or advisable in order to comply with the applicable laws of any such States;

                                      10

 
     (iii) the preparation for filing by the Trust and execution on behalf of
the Trust of an application to The Nasdaq Stock Market's National Market or a
national stock exchange or other organizations for listing upon notice of
issuance of any Preferred Securities and to file or cause an Administrative
Trustee to file thereafter with such exchange or organization such notifications
and documents as may be necessary from time to time;

     (iv)  the preparation for filing by the Trust with the Commission and the
execution on behalf of the Trust of a registration statement on Form 8-A
relating to the registration of the Preferred Securities under Section 12(b) or
12(g) of the Exchange Act, including any amendments thereto;

     (v)   the negotiation of the terms of, and the execution and delivery of,
the Underwriting Agreement providing for the sale of the Preferred Securities;
and

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

  (d) Notwithstanding anything herein to the contrary, the Administrative
Trustees are authorized and directed to conduct the affairs of the Trust and to
operate the Trust so that the Trust shall not be deemed to be an "investment
company" required to be registered under the Investment Company Act, shall be
classified as a "grantor trust" and not as an association taxable as a
corporation for United States federal income tax purposes and so that the
Debentures shall be treated as indebtedness of the Depositor for United States
federal income tax purposes. In this connection, subject to Section 1002, the
Depositor and the Administrative Trustees are authorized to take any action, not
inconsistent with applicable law or this Trust Agreement, that each of the
Depositor and the Administrative Trustees determines in their discretion to be
necessary or desirable for such purposes.

 SECTION 208. ASSETS OF TRUST.

 The assets of the Trust shall consist of the Trust Property.

 SECTION 209. TITLE TO TRUST PROPERTY.

  Legal title to all Trust Property shall be vested at all times in the Property
Trustee (in its capacity as such) and shall be held and administered by the
Property Trustee for the benefit of the Securityholders in accordance with this
Trust Agreement.

                                  ARTICLE III

                                PAYMENT ACCOUNT

 SECTION 301.  PAYMENT ACCOUNT.

  (a) On or prior to the Closing Date, the Property Trustee shall establish the
Payment Account. The Property Trustee and any agent of the Property Trustee
shall have exclusive control and sole right of withdrawal with respect to the
Payment Account for the purpose of making deposits and withdrawals from the
Payment Account in accordance with this Trust Agreement. All monies and other
property deposited or held from time to time in the Payment Account shall be
held by the Property Trustee in the Payment Account for the exclusive benefit of
the Securityholders and for distribution as herein provided, including (and
subject to) any priority of payments provided for herein.

  (b) The Property Trustee shall deposit in the Payment Account, promptly upon
receipt, all payments of principal of or interest on, and any other payments or
proceeds with respect to, the Debentures. Amounts held in the Payment Account
shall not be invested by the Property Trustee pending distribution thereof.

                                      11

 
                                 ARTICLE IV

                           DISTRIBUTIONS; REDEMPTION

 SECTION 401.  DISTRIBUTIONS.

  (a) Distributions on the Trust Securities shall be cumulative, and shall
accumulate whether or not there are funds of the Trust available for the payment
of Distributions. Distributions shall accumulate from June 4, 1997, and, except
during any Extended Interest Payment Period with respect to the Debentures,
shall be payable quarterly in arrears on January 31, April 30, July 31 and
October 31 of each year, commencing on July 31, 1997. If any date on which a
Distribution is otherwise payable on the Trust Securities is not a Business Day,
then the payment of such Distribution shall be made on the next succeeding day
that is a Business Day (and without any interest or other payment in respect of
any such delay) with the same force and effect as if made on such date (each
date on which distributions are payable in accordance with this Section 401(a),
a "Distribution Date").

  (b) The Trust Securities represent undivided beneficial interests in the Trust
Property.  Distributions on the Trust Securities shall be payable at a rate of
9.30% per annum of the Liquidation Amount of the Trust Securities. The amount of
Distributions payable for any full period shall be computed on the basis of a
360-day year of twelve 30-day months. The amount of Distributions for any
partial period shall be computed on the basis of the number of days elapsed in a
360-day year of twelve 30 day months. During any Extended Interest Payment
Period with respect to the Debentures, Distributions on the Preferred Securities
shall be deferred for a period equal to the Extended Interest Payment Period.
The amount of Distributions payable for any period shall include the Additional
Amounts, if any.

  (c) Distributions on the Trust Securities shall be made by the Property
Trustee solely from the Payment Account and shall be payable on each
Distribution Date only to the extent that the Trust has funds then on hand and
immediately available by 12:30 p.m. on each Distribution Date in the Payment
Account for the payment of such Distributions.

  (d) Distributions on the Trust Securities with respect to a Distribution Date
shall be payable to the Holders thereof as they appear on the Securities
Register for the Trust Securities on the relevant record date, which shall be
the 15th day of the month in which the Distribution is payable.

 SECTION 402.  REDEMPTION.

  (a) On each Debenture Redemption Date and on the stated maturity of the
Debentures, the Trust shall be required to redeem a Like Amount of Trust
Securities at the Redemption Price.

  (b) Notice of redemption shall be given by the Property Trustee by first-class
mail, postage prepaid, mailed not less than 30 nor more than 60 days prior to
the Redemption Date to each Holder of Trust Securities to be redeemed, at such
Holder's address appearing in the Securities Register. The Property Trustee
shall have no responsibility for the accuracy of any CUSIP number contained in
such notice. All notices of redemption shall state:

     (i)   the Redemption Date;

     (ii)  the Redemption Price;

     (iii) the CUSIP number;

     (iv)  if less than all the Outstanding Trust Securities are to be redeemed,
the identification and the aggregate Liquidation Amount of the particular Trust
Securities to be redeemed; and

     (v)   that, on the Redemption Date, the Redemption Price shall become due
and payable upon each such Trust Security to be redeemed and that Distributions
thereon shall cease to accumulate on and after said date.

                                      12

 
  (c) The Trust Securities redeemed on each Redemption Date shall be redeemed at
the Redemption Price with the proceeds from the contemporaneous redemption of
Debentures. Redemptions of the Trust Securities shall be made and the Redemption
Price shall be payable on each Redemption Date only to the extent that the Trust
has immediately available funds then on hand and available in the Payment
Account for the payment of such Redemption Price.

  (d) If the Property Trustee gives a notice of redemption in respect of any
Preferred Securities, then, by 12:00 noon, New York City time, on the Redemption
Date, subject to Section 402(c), the Property Trustee shall deposit with the
Paying Agent funds sufficient to pay the applicable Redemption Price and shall
give the Paying Agent irrevocable instructions and authority to pay the
Redemption Price to the Holders thereof upon surrender of their Preferred
Securities Certificates. Notwithstanding the foregoing, Distributions payable on
or prior to the Redemption Date for any Trust Securities called for redemption
shall be payable to the Holders of such Trust Securities as they appear on the
Securities Register for the Trust Securities on the relevant record dates for
the related Distribution Dates. If notice of redemption shall have been given
and funds deposited as required, then upon the date of such deposit, all rights
of Securityholders holding Trust Securities so called for redemption shall
cease, except the right of such Securityholders to receive the Redemption Price
and any Distribution payable on or prior to the Redemption Date, but without
interest, and such Trust Securities shall cease to be Outstanding. In the event
that any date on which any Redemption Price is payable is not a Business Day,
then payment of the Redemption Price payable on such date shall be made on the
next succeeding day that is a Business Day (and without any interest or other
payment in respect of any such delay) with the same force and effect as if made
on such date. In the event that payment of the Redemption Price in respect of
any Trust Securities called for redemption is improperly withheld or refused and
not paid either by the Trust or by the Depositor pursuant to the Guarantee,
Distributions on such Trust Securities shall continue to accumulate, at the then
applicable rate, from the Redemption Date originally established by the Trust
for such Trust Securities to the date such Redemption Price is actually paid, in
which case the actual payment date shall be the date fixed for redemption for
purposes of calculating the Redemption Price.

  (e) Payment of the Redemption Price on the Trust Securities shall be made to
the record holders thereof as they appear on the Securities Register for the
Trust Securities on the relevant record date, which shall be the date 15 days
prior to the relevant Redemption Date.

  (f) Subject to Section 403(a), if less than all the Outstanding Trust
Securities are to be redeemed on a Redemption Date, then the aggregate
Liquidation Amount of Trust Securities to be redeemed shall be allocated on a
pro rata basis (based on Liquidation Amounts) among the Common Securities and
the Preferred Securities. The particular Preferred Securities to be redeemed
shall be selected not more than 60 days prior to the Redemption Date by the
Property Trustee from the Outstanding Preferred Securities not previously called
for redemption, by such method (including, without limitation, by lot) as the
Property Trustee shall deem fair and appropriate and which may provide for the
selection for redemption of portions (equal to $25 or an integral multiple of
$25 in excess thereof) of the Liquidation Amount of Preferred Securities of a
denomination larger than $25. The Property Trustee shall promptly notify the
Securities Registrar in writing of the Preferred Securities selected for
redemption and, in the case of any Preferred Securities selected for partial
redemption, the Liquidation Amount thereof to be redeemed. For all purposes of
this Trust Agreement, unless the context otherwise requires, all provisions
relating to the redemption of Preferred Securities shall relate, in the case of
any Preferred Securities redeemed or to be redeemed only in part, to the portion
of the Liquidation Amount of Preferred Securities which has been or is to be
redeemed.

 SECTION 403.  SUBORDINATION OF COMMON SECURITIES.

  (a) Payment of Distributions (including Additional Amounts, if applicable) on,
and the Redemption Price of, the Trust Securities, as applicable, shall be made,
subject to Section 402(f), pro rata among the Common Securities and the
Preferred Securities based on the Liquidation Amount of the Trust Securities;
provided, however, that if on any Distribution Date or Redemption Date any Event
of Default resulting from a Debenture Event of Default shall have occurred and
be continuing, no payment of any Distribution (including Additional Amounts, if
applicable) on, or Redemption Price of, any Common Security, and no other
payment on account of the redemption, liquidation or

                                      13

 
other acquisition of Common Securities, shall be made unless payment in full in
cash of all accumulated and unpaid Distributions (including Additional Amounts,
if applicable) on all Outstanding Preferred Securities for all Distribution
periods terminating on or prior thereto, or in the case of payment of the
Redemption Price the full amount of such Redemption Price on all Outstanding
Preferred Securities then called for redemption, shall have been made or
provided for, and all funds immediately available to the Property Trustee shall
first be applied to the payment in full in cash of all Distributions (including
Additional Amounts, if applicable) on, or the Redemption Price of, Preferred
Securities then due and payable.

  (b) In the case of the occurrence of any Event of Default resulting from a
Debenture Event of Default, the Holder of Common Securities shall be deemed to
have waived any right to act with respect to any such Event of Default under
this Trust Agreement until the effect of all such Events of Default with respect
to the Preferred Securities shall have been cured, waived or otherwise
eliminated. Until any such Event of Default under this Trust Agreement with
respect to the Preferred Securities shall have been so cured, waived or
otherwise eliminated, the Property Trustee shall act solely on behalf of the
Holders of the Preferred Securities and not the Holder of the Common Securities,
and only the Holders of the Preferred Securities shall have the right to direct
the Property Trustee to act on their behalf.

 SECTION 404.  PAYMENT PROCEDURES.

  Payments of Distributions (including Additional Amounts, if applicable) in
respect of the Preferred Securities shall be made by check mailed to the address
of the Person entitled thereto as such address shall appear on the Securities
Register. Payments in respect of the Common Securities shall be made in such
manner as shall be mutually agreed between the Property Trustee and the Common
Securityholder.

 SECTION 405.  TAX RETURNS AND REPORTS.

  The Administrative Trustees shall prepare (or cause to be prepared), at the
Depositor's expense, and file all United States federal, state and local tax and
information returns and reports required to be filed by or in respect of the
Trust. In this regard, the Administrative Trustees shall (a) prepare and file
(or cause to be prepared and filed) the appropriate Internal Revenue Service
form required to be filed in respect of the Trust in each taxable year of the
Trust; and (b) prepare and furnish (or cause to be prepared and furnished) to
each Securityholder the appropriate Internal Revenue Service form required to be
furnished to such Securityholder or the information required to be provided on
such form. The Administrative Trustees shall provide the Depositor with a copy
of all such returns and reports promptly after such filing or furnishing. The
Property Trustee shall comply with United States federal withholding and backup
withholding tax laws and information reporting requirements with respect to any
payments to Securityholders under the Trust Securities.

 SECTION 406.  PAYMENT OF TAXES, DUTIES, ETC. OF THE TRUST.

  Upon receipt under the Debentures of Additional Interest, the Property
Trustee, at the direction of an Administrative Trustee or the Depositor, shall
promptly pay any taxes, duties or governmental charges of whatsoever nature
(other than withholding taxes) imposed on the Trust by the United States or any
other taxing authority.

 SECTION 407.  PAYMENTS UNDER INDENTURE.

  Any amount payable hereunder to any Holder of Preferred Securities shall be
reduced by the amount of any corresponding payment such Holder has directly
received under the Indenture pursuant to Section 514(b) or (c) hereof.

                                      14

 
                                   ARTICLE V

                         TRUST SECURITIES CERTIFICATES

 SECTION 501.  INITIAL OWNERSHIP.

  Upon the creation of the Trust and the contribution by the Depositor pursuant
to Section 203 and until the issuance of the Trust Securities, and at any time
during which no Trust Securities are outstanding, the Depositor shall be the
sole beneficial owner of the Trust.

 SECTION 502.  THE TRUST SECURITIES CERTIFICATES.

  The Preferred Securities Certificates shall be issued in minimum denominations
of $25 Liquidation Amount and integral multiples of $25 in excess thereof, and
the Common Securities Certificates shall be issued in denominations of $25
Liquidation Amount and integral multiples thereof. The Trust Securities
Certificates shall be executed on behalf of the Trust by manual or facsimile
signature of at least one Administrative Trustee. Trust Securities Certificates
bearing the manual or facsimile signatures of individuals who were, at the time
when such signatures shall have been affixed, authorized to sign on behalf of
the Trust, shall be validly issued and entitled to the benefits of this Trust
Agreement, notwithstanding that such individuals or any of them shall have
ceased to be so authorized prior to the delivery of such Trust Securities
Certificates or did not hold such offices at the date of delivery of such Trust
Securities Certificates. A transferee of a Trust Securities Certificate shall
become a Securityholder, and shall be entitled to the rights and subject to the
obligations of a Securityholder hereunder, upon due registration of such Trust
Securities Certificate in such transferee's name pursuant to Sections 504 and
511.

 SECTION 503.  EXECUTION, AUTHENTICATION AND DELIVERY OF TRUST SECURITIES
CERTIFICATES.

  (a) On the Closing Date and on the date on which the Underwriter exercises the
Option, as applicable (the "Option Closing Date"), the Administrative Trustees
shall cause Trust Securities Certificates, in an aggregate Liquidation Amount as
provided in Sections 204 and 205, to be executed on behalf of the Trust by at
least one of the Administrative Trustees and delivered to or upon the written
order of the Depositor, signed by its Chief Executive Officer, President, any
Vice President, the Treasurer or any Assistant Treasurer without further
corporate action by the Depositor, in authorized denominations.

  (b) A Preferred Securities Certificate shall not be valid until authenticated
by the manual signature of an authorized signatory of the Property Trustee.  The
signature of the Property Trustee shall be conclusive evidence that the
Preferred Securities Certificate has been authenticated under this Trust
Agreement.  Each Preferred Security Certificate shall be dated the date of its
authentication.

  (c) Upon the written order of the Trust signed by the Administrative Trustee,
the Property Trustee shall authenticate and make available for delivery the
Preferred Securities Certificates.

  (d) The Property Trustee may appoint an Authenticating Agent acceptable to the
Trust to authenticate the Preferred Securities.  An Authenticating Agent may
authenticate the Preferred Securities whenever the Property Trustee may do so.
Each reference in this Trust Agreement to authentication by the Property Trustee
includes authentication by such agent.  An Authenticating Agent has the same
rights as the Property Trustee to deal with the Depositor or the Trust.

 SECTION 504.  REGISTRATION OF TRANSFER AND EXCHANGE OF PREFERRED SECURITIES
CERTIFICATES.

  (a) The Depositor shall keep or cause to be kept, at the office or agency
maintained pursuant to Section 508, a register or registers for the purpose of
registering Trust Securities Certificates and transfers and exchanges of

                                      15

 
Preferred Securities Certificates (herein referred to as the "Securities
Register") in which the registrar designated by the Depositor (the "Securities
Registrar"), subject to such reasonable regulations as it may prescribe, shall
provide for the registration of Preferred Securities Certificates and Common
Securities Certificates (subject to Section 510 in the case of the Common
Securities Certificates) and registration of transfers and exchanges of
Preferred Securities Certificates as herein provided. The Property Trustee shall
be the initial Securities Registrar.

  (b) Upon surrender for registration of transfer of any Preferred Securities
Certificate at the office or agency maintained pursuant to Section 508, the
Administrative Trustees or any one of them shall execute and deliver, in the
name of the designated transferee or transferees, one or more new Preferred
Securities Certificates in authorized denominations of a like aggregate
Liquidation Amount dated the date of execution by such Administrative Trustee or
Trustees. The Securities Registrar shall not be required to register the
transfer of any Preferred Securities that have been called for redemption. At
the option of a Holder, Preferred Securities Certificates may be exchanged for
other Preferred Securities Certificates in authorized denominations of the same
class and of a like aggregate Liquidation Amount upon surrender of the Preferred
Securities Certificates to be exchanged at the office or agency maintained
pursuant to Section 508.

  (c) Every Preferred Securities Certificate presented or surrendered for
registration of transfer or exchange shall be accompanied by a written
instrument of transfer in form satisfactory to the Property Trustee and the
Securities Registrar duly executed by the Holder or his attorney duly authorized
in writing. Each Preferred Securities Certificate surrendered for registration
of transfer or exchange shall be canceled and subsequently disposed of by the
Property Trustee in accordance with its customary practice. The Trust shall not
be required to (i) issue, register the transfer of, or exchange any Preferred
Securities during a period beginning at the opening of business 15 calendar days
before the date of mailing of a notice of redemption of any Preferred Securities
called for redemption and ending at the close of business on the day of such
mailing; or (ii) register the transfer of or exchange any Preferred Securities
so selected for redemption, in whole or in part, except the unredeemed portion
of any such Preferred Securities being redeemed in part.

  (d) No service charge shall be made for any registration of transfer or
exchange of Preferred Securities Certificates, but the Securities Registrar may
require payment of a sum sufficient to cover any tax or governmental charge that
may be imposed in connection with any transfer or exchange of Preferred
Securities Certificates.

 SECTION 505.  MUTILATED, DESTROYED, LOST OR STOLEN TRUST SECURITIES
CERTIFICATES.

  If (a) any mutilated Trust Securities Certificate shall be surrendered to the
Securities Registrar, or if the Securities Registrar shall receive evidence to
its satisfaction of the destruction, loss or theft of any Trust Securities
Certificate; and (b) there shall be delivered to the Securities Registrar, the
Property Trustee and the Administrative Trustees such security or indemnity as
may be required by them to save each of them harmless, then in the absence of
notice that such Trust Securities Certificate shall have been acquired by a bona
fide purchaser, the Administrative Trustees, or any one of them, on behalf of
the Trust shall execute and make available for delivery, in exchange for or in
lieu of any such mutilated, destroyed, lost or stolen Trust Securities
Certificate, a new Trust Securities Certificate of like class, tenor and
denomination. In connection with the issuance of any new Trust Securities
Certificate under this Section 505, the Administrative Trustees or the
Securities Registrar 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 Trust Securities Certificate issued pursuant to this Section 505
shall constitute conclusive evidence of an undivided beneficial interest in the
assets of the Trust, as if originally issued, whether or not the lost, stolen or
destroyed Trust Securities Certificate shall be found at any time.

 SECTION 506.  PERSONS DEEMED SECURITYHOLDERS.

  The Trustees, the Paying Agent and the Securities Registrar shall treat the
Person in whose name any Trust Securities Certificate shall be registered in the
Securities Register as the owner of such Trust Securities Certificate

                                      16

 
for the purpose of receiving Distributions and for all other purposes
whatsoever, and neither the Trustees nor the Securities Registrar shall be bound
by any notice to the contrary.

 SECTION 507.  ACCESS TO LIST OF SECURITYHOLDERS' NAMES AND ADDRESSES.

  At any time when the Property Trustee is not also acting as the Securities
Registrar, the Administrative Trustees or the Depositor shall furnish or cause
to be furnished to the Property Trustee (a) semi-annually on or before January
15 and July 15 in each year, a list, in such form as the Property Trustee may
reasonably require, of the names and addresses of the Securityholders as of the
most recent record date; and (b) promptly after receipt by any Administrative
Trustee or the Depositor of a request therefor from the Property Trustee in
order to enable the Property Trustee to discharge its obligations under this
Trust Agreement, in each case to the extent such information is in the
possession or control of the Administrative Trustees or the Depositor and is not
identical to a previously supplied list or has not otherwise been received by
the Property Trustee in its capacity as Securities Registrar. The rights of
Securityholders to communicate with other Securityholders with respect to their
rights under this Trust Agreement or under the Trust Securities, and the
corresponding rights of the Trustee shall be as provided in the Trust Indenture
Act. Each Holder, by receiving and holding a Trust Securities Certificate, and
each owner shall be deemed to have agreed not to hold the Depositor, the
Property Trustee or the Administrative Trustees accountable by reason of the
disclosure of its name and address, regardless of the source from which such
information was derived.

 SECTION 508.  MAINTENANCE OF OFFICE OR AGENCY.

  The Administrative Trustees shall maintain in a location or locations
designated by the Administrative Trustees, an office or offices or agency or
agencies where Preferred Securities Certificates may be surrendered for
registration of transfer or exchange and where notices and demands to or upon
the Trustees in respect of the Trust Securities Certificates may be served. The
Administrative Trustees initially designate the Corporate Trust Office of the
Property Trustee, Two International Place, 4th Floor, Boston, Massachusetts
02110, as the principal corporate trust office for such purposes. The
Administrative Trustees shall give prompt written notice to the Depositor and to
the Securityholders of any change in the location of the Securities Register or
any such office or agency.

 SECTION 509.  APPOINTMENT OF PAYING AGENT.

  The Paying Agent shall initially be the Property Trustee, and any co-paying
agent chosen by the Property Trustee must be acceptable to the Administrative
Trustees and the Depositor. The Paying Agent shall make Distributions to
Securityholders from the Payment Account and shall report the amounts of such
Distributions to the Property Trustee and the Administrative Trustees. Any
Paying Agent shall have the revocable power to withdraw funds from the Payment
Account for the purpose of making the Distributions referred to above. The
Administrative Trustees may revoke such power and remove the Paying Agent if
such Trustees determine in their sole discretion that the Paying Agent shall
have failed to perform its obligations under this Trust Agreement in any
material respect. Any Person acting as Paying Agent shall be permitted to resign
as Paying Agent upon 30 days' written notice to the Administrative Trustees, the
Property Trustee and the Depositor. In the event that the Property Trustee shall
no longer be the Paying Agent or a successor Paying Agent shall resign or its
authority to act be revoked, the Administrative Trustees shall appoint a
successor that is acceptable to the Property Trustee and the Depositor to act as
Paying Agent (which shall be a bank or trust company). The Administrative
Trustees shall cause such successor Paying Agent or any additional Paying Agent
appointed by the Administrative Trustees to execute and deliver to the Trustees
an instrument in which such successor Paying Agent or additional Paying Agent
shall agree with the Trustees that as Paying Agent, such successor Paying Agent
or additional Paying Agent shall hold all sums, if any, held by it for payment
to the Securityholders in trust for the benefit of the Securityholders entitled
thereto until such sums shall be paid to such Securityholders. The Paying Agent
shall return all unclaimed funds to the Property Trustee and, upon removal of a
Paying Agent, such Paying Agent shall also return all funds in its possession to
the Property Trustee. The provisions of Sections 801, 803 and 806 shall apply to
the Property Trustee also in its role as Paying Agent, for so long as the
Property Trustee shall act as Paying Agent and, to the extent applicable, to any
other paying

                                      17

 
agent appointed hereunder. Any reference in this Trust Agreement to the Paying
Agent shall include any co-paying agent unless the context requires otherwise.

 SECTION 510.  OWNERSHIP OF COMMON SECURITIES BY DEPOSITOR.

  On the Closing Date, the Depositor shall acquire and retain beneficial and
record ownership of the Common Securities. To the fullest extent permitted by
law, any attempted transfer of the Common Securities (other than a transfer in
connection with a merger or consolidation of the Depositor into another
corporation pursuant to Section 12.1 of the Indenture) shall be void. The
Administrative Trustees shall cause each Common Securities Certificate issued to
the Depositor to contain a legend stating "THIS CERTIFICATE IS NOT
TRANSFERABLE".

 SECTION 511.  PREFERRED SECURITIES CERTIFICATES.

  (a) Each owner shall receive a Preferred Securities Certificate representing
such owner's interest in such Preferred Securities. Upon the issuance of
Preferred Securities Certificates, the Trustees shall recognize the record
holders of the Preferred Securities Certificates as Securityholders. The
Preferred Securities Certificates shall be printed, lithographed or engraved or
may be produced in any other manner as is reasonably acceptable to the
Administrative Trustees, as evidenced by the execution thereof by the
Administrative Trustees or any one of them.

  (b) A single Common Securities Certificate representing the Common Securities
shall be issued to the Depositor in the form of a definitive Common Securities
Certificate.

 SECTION 512.  [Intentionally Omitted]

 SECTION 513.  [Intentionally Omitted]

 SECTION 514.  RIGHTS OF SECURITYHOLDERS.

  (a) The legal title to the Trust Property is vested exclusively in the
Property Trustee (in its capacity as such) in accordance with Section 209, and
the Securityholders shall not have any right or title therein other than the
undivided beneficial interest in the assets of the Trust conferred by their
Trust Securities and they shall have no right to call for any partition or
division of property, profits or rights of the Trust except as described below.
The Trust Securities shall be personal property giving only the rights
specifically set forth therein and in this Trust Agreement. The Trust Securities
shall have no preemptive or similar rights. When issued and delivered to Holders
of the Preferred Securities against payment of the purchase price therefor, the
Preferred Securities shall be fully paid and nonassessable interests in the
Trust. The Holders of the Preferred Securities, in their capacities as such,
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.

  (b) For so long as any Preferred Securities remain Outstanding, if, upon a
Debenture Event of Default, the Debenture Trustee fails or the holders of not
less than 25% in principal amount of the outstanding Debentures fail to declare
the principal of all of the Debentures to be immediately due and payable, the
Holders of at least 25% in Liquidation Amount of the Preferred Securities then
Outstanding shall have such right by a notice in writing to the Depositor and
the Debenture Trustee; and upon any such declaration such principal amount of
and the accrued interest on all of the Debentures shall become immediately due
and payable, provided that the payment of principal and interest on such
Debentures shall remain subordinated to the extent provided in the Indenture.

  (c) For so long as any Preferred Securities remain outstanding, if, upon a
Debenture Event of Default arising from the failure to pay interest or principal
on the Debentures, the Holders of any Preferred Securities then Outstanding
shall, to the fullest extent permitted by law, have the right to directly
institute proceedings for enforcement of payment to such Holders of principal of
or interest on the Debentures having a principal amount equal to the Liquidation
Amount of the Preferred Securities of such Holders.

                                      18

 
                                 ARTICLE VI

                   ACTS OF SECURITYHOLDERS; MEETINGS; VOTING

 SECTION 601.  LIMITATIONS ON VOTING RIGHTS.

  (a) Except as provided in this Section 601, in Sections 514, 810 and 1002 and
in the Indenture and as otherwise required by law, no Holder of Preferred
Securities shall have any right to vote or in any manner otherwise control the
administration, operation and management of the Trust or the obligations of the
parties hereto, nor shall anything herein set forth, or contained in the terms
of the Trust Securities Certificates, be construed so as to constitute the
Securityholders from time to time as partners or members of an association.

  (b) So long as any Debentures are held by the Property Trustee, the Trustees
shall not (i) direct the time, method and place of conducting any proceeding for
any remedy available to the Debenture Trustee, or executing any trust or power
conferred on the Debenture Trustee with respect to such Debentures; (ii) waive
any past default which is waivable under Article VII of the Indenture; (iii)
exercise any right to rescind or annul a declaration that the principal of all
the Debentures shall be due and payable; or (iv) consent to any amendment,
modification or termination of the Indenture or the Debentures, where such
consent shall be required, without, in each case, obtaining the prior approval
of the Holders of at least a majority in Liquidation Amount of all Outstanding
Preferred Securities; provided, however, that where a consent under the
Indenture would require the consent of each Holder of outstanding Debentures
affected thereby, no such consent shall be given by the Property Trustee without
the prior written consent of each holder of Preferred Securities. The Trustees
shall not revoke any action previously authorized or approved by a vote of the
Holders of the Outstanding Preferred Securities, except by a subsequent vote of
the Holders of the Outstanding Preferred Securities. The Property Trustee shall
notify each Holder of the Outstanding Preferred Securities of any notice of
default received from the Debenture Trustee with respect to the Debentures. In
addition to obtaining the foregoing approvals of the Holders of the Preferred
Securities, prior to taking any of the foregoing actions, the Trustees shall, at
the expense of the Depositor, obtain an Opinion of Counsel experienced in such
matters to the effect that the Trust shall continue to be classified as a
grantor trust and not as an association taxable as a corporation for United
States federal income tax purposes on account of such action.

  (c) If any proposed amendment to the Trust Agreement provides for, or the
Trustees otherwise propose to effect, (i) any action that would adversely affect
in any material respect the powers, preferences or special rights of the
Preferred Securities, whether by way of amendment to the Trust Agreement or
otherwise; or (ii) the dissolution, winding-up or termination of the Trust,
other than pursuant to the terms of this Trust Agreement, then the Holders of
Outstanding Preferred Securities as a class shall be entitled to vote on such
amendment or proposal and such amendment or proposal shall not be effective
except with the approval of the Holders of at least a majority in Liquidation
Amount of the Outstanding Preferred Securities. No amendment to this Trust
Agreement may be made if, as a result of such amendment, the Trust would cease
to be classified as a grantor trust or would be classified as an association
taxable as a corporation for United States federal income tax purposes.

 SECTION 602.  NOTICE OF MEETINGS.

  Notice of all meetings of the Preferred Securityholders, stating the time,
place and purpose of the meeting, shall be given by the Property Trustee
pursuant to Section 1008 to each Preferred Securityholder of record, at his
registered address, at least 15 days and not more than 90 days before the
meeting. At any such meeting, any business properly before the meeting may be so
considered whether or not stated in the notice of the meeting. Any adjourned
meeting may be held as adjourned without further notice.

 SECTION 603.  MEETINGS OF PREFERRED SECURITYHOLDERS.

  (a) No annual meeting of Securityholders is required to be held. The
Administrative Trustees, however, shall call a meeting of Securityholders to
vote on any matter in respect of which Preferred Securityholders are entitled to
vote upon the written request of the Preferred Securityholders of 25% of the
Outstanding Preferred Securities

                                      19

 
(based upon their aggregate Liquidation Amount) and the Administrative Trustees
or the Property Trustee may, at any time in their discretion, call a meeting of
Preferred Securityholders to vote on any matters as to which the Preferred
Securityholders are entitled to vote.

  (b) Preferred Securityholders of record of 50% of the Outstanding Preferred
Securities (based upon their aggregate Liquidation Amount), present in person or
by proxy, shall constitute a quorum at any meeting of Securityholders.

  (c) If a quorum is present at a meeting, an affirmative vote by the Preferred
Securityholders of record present, in person or by proxy, holding more than a
majority of the Preferred Securities (based upon their aggregate Liquidation
Amount) held by the Preferred Securityholders of record present, either in
person or by proxy, at such meeting shall constitute the action of the
Securityholders, unless this Trust Agreement requires a greater number of
affirmative votes.

 SECTION 604.  VOTING RIGHTS.

  Securityholders shall be entitled to one vote for each $25 of Liquidation
Amount represented by their Trust Securities in respect of any matter as to
which such Securityholders are entitled to vote.

 SECTION 605.  PROXIES, ETC.

  At any meeting of Securityholders, any Securityholder entitled to vote thereat
may vote by proxy, provided that no proxy shall be voted at any meeting unless
it shall have been placed on file with the Administrative Trustees, or with such
other officer or agent of the Trust as the Administrative Trustees may direct,
for verification prior to the time at which such vote shall be taken. When Trust
Securities are held jointly by several persons, any one of them may vote at any
meeting in person or by proxy in respect of such Trust Securities, but if more
than one of them shall be present at such meeting in person or by proxy, and
such joint owners or their proxies so present disagree as to any vote to be
cast, such vote shall not be received in respect of such Trust Securities. A
proxy purporting to be executed by or on behalf of a Securityholder shall be
deemed valid unless challenged at or prior to its exercise, and, the burden of
proving invalidity shall rest on the challenger. No proxy shall be valid more
than three years after its date of execution.

 SECTION 606.  SECURITYHOLDER ACTION BY WRITTEN CONSENT.

  Any action which may be taken by Securityholders at a meeting may be taken
without a meeting if Securityholders holding more than a majority of all
Outstanding Trust Securities (based upon their aggregate Liquidation Amount)
entitled to vote in respect of such action (or such larger proportion thereof as
shall be required by any express provision of this Trust Agreement) shall
consent to the action in writing (based upon their aggregate Liquidation
Amount).

 SECTION 607.  RECORD DATE FOR VOTING AND OTHER PURPOSES.

  For the purposes of determining the Securityholders who are entitled to notice
of and to vote at any meeting or by written consent, or to participate in any
Distribution on the Trust Securities in respect of which a record date is not
otherwise provided for in this Trust Agreement, or for the purpose of any other
action, the Administrative Trustees may from time to time fix a date, not more
than 90 days prior to the date of any meeting of Securityholders or the payment
of Distribution or other action, as the case may be, as a record date for the
determination of the identity of the Securityholders of record for such
purposes.

                                      20

 
 SECTION 608.  ACTS OF SECURITYHOLDERS.

  (a) Any request, demand, authorization, direction, notice, consent, waiver or
other action provided or permitted by this Trust Agreement to be given, made or
taken by Securityholders may be embodied in and evidenced by one or more
instruments of substantially similar tenor signed by such Securityholders in
person or by an agent duly appointed in writing; and, except as otherwise
expressly provided herein, such action shall become effective when such
instrument or instruments are delivered to an Administrative Trustee. Such
instrument or instruments (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Securityholders
signing such instrument or instruments. Proof of execution of any such
instrument or of a writing appointing any such agent shall be sufficient for any
purpose of this Trust Agreement and (subject to Section 801) conclusive in favor
of the Trustees, if made in the manner provided in this Section 608.

  (b) The fact and date of the execution by any Person of any such instrument or
writing may be proved by the affidavit of a witness of such execution or by a
certificate of a notary public or other officer authorized by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a signer acting in a capacity other than his individual capacity, such
certificate or affidavit shall also constitute sufficient proof of his
authority. The fact and date of the execution of any such instrument or writing,
or the authority of the Person executing the same, may also be proved in any
other manner which any Trustee receiving the same deems sufficient.

  (c) The ownership of Preferred Securities shall be proved by the Securities
Register.

  (d) Any request, demand, authorization, direction, notice, consent, waiver or
other Act of the Securityholder of any Trust Security shall bind every future
Securityholder of the same Trust Security and the Securityholder of every Trust
Security issued upon the registration of transfer thereof or in exchange
therefor or in lieu thereof in respect of anything done, omitted or suffered to
be done by the Trustees or the Trust in reliance thereon, whether or not
notation of such action is made upon such Trust Security.

  (e) Without limiting the foregoing, a Securityholder entitled hereunder to
take any action hereunder with regard to any particular Trust Security may do so
with regard to all or any part of the Liquidation Amount of such Trust Security
or by one or more duly appointed agents each of which may do so pursuant to such
appointment with regard to all or any part of such Liquidation Amount.

  (f) A Securityholder may institute a legal proceeding directly against the
Depositor under the Guarantee to enforce its rights under the Guarantee without
first instituting a legal proceeding against the Guarantee Trustee (as defined
in the Guarantee), the Trust or any Person.

 SECTION 609.  INSPECTION OF RECORDS.

  Upon reasonable notice to the Administrative Trustees and the Property
Trustee, the records of the Trust shall be open to inspection and copying by
Securityholders and their authorized representatives during normal business
hours for any purpose reasonably related to such Securityholder's interest as a
Securityholder.

                                      21

 
                                   ARTICLE VI

                         REPRESENTATIONS AND WARRANTIES

 SECTION 701.  REPRESENTATIONS AND WARRANTIES OF THE BANK AND THE PROPERTY
TRUSTEE.

  The Bank and the Property Trustee, each severally on behalf of and as to
itself, as of the date hereof, and each successor Property Trustee at the time
of the successor Property Trustee's acceptance of its appointment as Property
Trustee hereunder (the term "Bank" being used to refer to such successor
Property Trustee in its separate corporate capacity) hereby represents and
warrants (as applicable) for the benefit of the Depositor and the
Securityholders that:

  (a) the Bank is a trust company duly organized, validly existing and in good
standing under the laws of the Commonwealth of Massachusetts;

  (b) the Bank has full corporate power, authority and legal right to execute,
deliver and perform its obligations under this Trust Agreement and has taken all
necessary action to authorize the execution, delivery and performance by it of
this Trust Agreement;

  (c) this Trust Agreement has been duly authorized, executed and delivered by
the Property Trustee and constitutes the valid and legally binding agreement of
the Property Trustee enforceable against it in accordance with its terms,
subject to bankruptcy, insolvency, fraudulent transfer, reorganization,
moratorium and similar laws of general applicability relating to or affecting
creditors, rights and to general equity principles;

  (d) the execution, delivery and performance by the Property Trustee of this
Trust Agreement has been duly authorized by all necessary corporate or other
action on the part of the Property Trustee and does not require any approval of
stockholders of the Bank and such execution, delivery and performance shall not
(i) violate the Bank's charter or by-laws; (ii) violate any provision of, or
constitute, with or without notice or lapse of time, a default under, or result
in the creation or imposition of, any Lien on any properties included in the
Trust Property pursuant to the provisions of, any indenture, mortgage, credit
agreement, license or other agreement or instrument to which the Property
Trustee or the Bank is a party or by which it is bound; or (iii) violate any
law, governmental rule or regulation of the United States or the Commonwealth of
Massachusetts, as the case may be, governing the banking or trust powers of the
Bank or the Property Trustee (as appropriate in context) or any order, judgment
or decree applicable to the Property Trustee or the Bank;

  (e) neither the authorization, execution or delivery by the Property Trustee
of this Trust Agreement nor the consummation of any of the transactions by the
Property Trustee contemplated herein or therein requires the consent or approval
of, the giving of notice to, the registration with or the taking of any other
action with respect to any governmental authority or agency under any existing
federal law governing the banking or trust powers of the Bank or the Property
Trustee, as the case may be, under the laws of the United States or the
Commonwealth of Massachusetts; and

  (f) there are no proceedings pending or, to the best of the Property Trustee's
knowledge, threatened against or affecting the Bank or the Property Trustee in
any court or before any governmental authority, agency or arbitration board or
tribunal which, individually or in the aggregate, would materially and adversely
affect the Trust or would question the right, power and authority of the
Property Trustee to enter into or perform its obligations as one of the Trustees
under this Trust Agreement.

                                      22

 
 SECTION 702.  REPRESENTATIONS AND WARRANTIES OF THE DELAWARE BANK AND THE
DELAWARE TRUSTEE.

  The Delaware Bank and the Delaware Trustee, each severally on behalf of and as
to itself, as of the date hereof, and each successor Delaware Trustee at the
time of the successor Delaware Trustee's acceptance of appointment as Delaware
Trustee hereunder (the term "Delaware Bank" being used to refer to such
successor Delaware Trustee in its separate corporate capacity), hereby
represents and warrants (as applicable) for the benefit of the Depositor and the
Securityholders that:

  (a) the Delaware Bank is a Delaware banking corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware;

  (b) the Delaware Bank has full corporate power, authority and legal right to
execute, deliver and perform its obligations under this Trust Agreement and has
taken all necessary action to authorize the execution, delivery and performance
by it of this Trust Agreement;

  (c) this Trust Agreement has been duly authorized, executed and delivered by
the Delaware Trustee and constitutes the valid and legally binding agreement of
the Delaware Trustee enforceable against it in accordance with its terms,
subject to bankruptcy, insolvency, fraudulent transfer, reorganization,
moratorium and similar laws of general applicability relating to or affecting
creditors, rights and to general equity principles;

  (d) the execution, delivery and performance by the Delaware Trustee of this
Trust Agreement has been duly authorized by all necessary corporate or other
action on the part of the Delaware Trustee and does not require any approval of
stockholders of the Delaware Bank and such execution, delivery and performance
shall not (i) violate the Delaware Bank's charter or by-laws; (ii) violate any
provision of, or constitute, with or without notice or lapse of time, a default
under, or result in the creation or imposition of, any Lien on any properties
included in the Trust Property pursuant to the provisions of, any indenture,
mortgage, credit agreement, license or other agreement or instrument to which
the Delaware Bank or the Delaware Trustee is a party or by which it is bound; or
(iii) violate any law, governmental rule or regulation of the United States or
the State of Delaware, as the case may be, governing the banking or trust powers
of the Delaware Bank or the Delaware Trustee (as appropriate in context) or any
order, judgment or decree applicable to the Delaware Bank or the Delaware
Trustee;

  (e) neither the authorization, execution or delivery by the Delaware Trustee
of this Trust Agreement nor the consummation of any of the transactions by the
Delaware Trustee contemplated herein or therein requires the consent or approval
of, the giving of notice to, the registration with or the taking of any other
action with respect to any governmental authority or agency under any existing
federal law governing the banking or trust powers of the Delaware Bank or the
Delaware Trustee, as the case may be, under the laws of the United States or the
State of Delaware; and

  (f) there are no proceedings pending or, to the best of the Delaware Trustee's
knowledge, threatened against or affecting the Delaware Bank or the Delaware
Trustee in any court or before any governmental authority, agency or arbitration
board or tribunal which, individually or in the aggregate, would materially and
adversely affect the Trust or would question the right, power and authority of
the Delaware Trustee to enter into or perform its obligations as one of the
Trustees under this Trust Agreement.

 SECTION 703.  REPRESENTATIONS AND WARRANTIES OF DEPOSITOR.

 The Depositor hereby represents and warrants for the benefit of the
Securityholders that:

  (a) the Trust Securities Certificates issued on the Closing Date or the Option
Closing Date, if applicable, on behalf of the Trust have been duly authorized
and, shall be, as of such date or dates, if applicable, duly and validly
executed, issued and delivered by the Administrative Trustees pursuant to the
terms and provisions of,

                                      23

 
and in accordance with the requirements of, this Trust Agreement and the
Securityholders shall be, as of such date or dates, if applicable, entitled to
the benefits of this Trust Agreement; and

  (b) there are no taxes, fees or other governmental charges payable by the
Trust (or the Trustees on behalf of the Trust) under the laws of the State of
Delaware or any political subdivision thereof in connection with the execution,
delivery and performance by the Bank, the Property Trustee or the Delaware
Trustee, as the case may be, of this Trust Agreement.

                                  ARTICLE VIII

                                    TRUSTEES

 SECTION 801.  CERTAIN DUTIES AND RESPONSIBILITIES.

  (a) The duties and responsibilities of the Trustees shall be as provided by
this Trust Agreement and, in the case of the Property Trustee, by the Trust
Indenture Act. Notwithstanding the foregoing, no provision of this Trust
Agreement shall require the Trustees to expend or risk their own funds or
otherwise incur any financial liability in the performance of any of their
duties hereunder, or in the exercise of any of their rights or powers, if they
shall have reasonable grounds for believing that repayment of such funds or
adequate indemnity against such risk or liability is not reasonably assured to
it. No Administrative Trustee nor the Delaware Trustee shall be liable for its
act or omissions hereunder except as a result of its own gross negligence or
willful misconduct. The Property Trustee's liability shall be determined under
the Trust Indenture Act. Whether or not therein expressly so provided, every
provision of this Trust Agreement relating to the conduct or affecting the
liability of or affording protection to the Trustees shall be subject to the
provisions of this Section 801. To the extent that, at law or in equity, the
Delaware Trustee or an Administrative Trustee has duties (including fiduciary
duties) and liabilities relating thereto to the Trust or to the Securityholders,
the Delaware Trustee or such Administrative Trustee shall not be liable to the
Trust or to any Securityholder for such Trustee's good faith reliance on the
provisions of this Trust Agreement. The provisions of this Trust Agreement, to
the extent that they restrict the duties and liabilities of the Delaware Trustee
or the Administrative Trustees otherwise existing at law or in equity, are
agreed by the Depositor and the Securityholders to replace such other duties and
liabilities of the Delaware Trustee and the Administrative Trustees, as the case
may be.

  (b) All payments made by the Property Trustee or a Paying Agent in respect of
the Trust Securities shall be made only from the revenue and proceeds from the
Trust Property and only to the extent that there shall be sufficient revenue or
proceeds from the Trust Property to enable the Property Trustee or a Paying
Agent to make payments in accordance with the terms hereof. With respect to the
relationship of each Securityholder and the Trustee, each Securityholder, by its
acceptance of a Trust Security, agrees that it shall look solely to the revenue
and proceeds from the Trust Property to the extent legally available for
distribution to it as herein provided and that the Trustees are not personally
liable to it for any amount distributable in respect of any Trust Security or
for any other liability in respect of any Trust Security. This Section 801(b)
does not limit the liability of the Trustees expressly set forth elsewhere in
this Trust Agreement or, in the case of the Property Trustee, in the Trust
Indenture Act.

  (c) No provision of this Trust Agreement shall be construed to relieve the
Property Trustee from liability for its own negligent action, its own negligent
failure to act, or its own willful misconduct, except that:

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

     (ii) the Property 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 in Liquidation Amount of
the Trust Securities relating to the time, method and place of conducting any
proceeding for any remedy available

                                      24

 
to the Property Trustee, or exercising any trust or power conferred upon the
Property Trustee under this Trust Agreement;

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

     (iv)   the Property Trustee shall not be liable for any interest on any
money received by it except as it may otherwise agree with the Depositor and
money held by the Property Trustee need not be segregated from other funds held
by it except in relation to the Payment Account maintained by the Property
Trustee pursuant to Section 301 and except to the extent otherwise required by
law; and

     (v)    the Property Trustee shall not be responsible for monitoring the
compliance by the Administrative Trustees or the Depositor with their respective
duties under this Trust Agreement, nor shall the Property Trustee be liable for
the negligence, default or misconduct of the Administrative Trustees or the
Depositor.

 SECTION 802.  CERTAIN NOTICES.

  (a) Within 5 Business Days after the occurrence of any Event of Default
actually known to the Property Trustee, the Property Trustee shall transmit, in
the manner and to the extent provided in Section 1008, notice of such Event of
Default to the Securityholders, the Administrative Trustees and the Depositor,
unless such Event of Default shall have been cured or waived. For purposes of
this Section 802 the term "Event of Default" means any event that is, or after
notice or lapse of time or both would become, an Event of Default.

  (b) The Administrative Trustees shall transmit, to the Securityholders in the
manner and to the extent provided in Section 1008, notice of the Depositor's
election to begin or further extend an Extended Interest Payment Period on the
Debentures (unless such election shall have been revoked) within the time
specified for transmitting such notice to the holders of the Debentures pursuant
to the Indenture as originally executed.

 SECTION 803.  CERTAIN RIGHTS OF PROPERTY TRUSTEE.

 Subject to the provisions of Section 801:

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

  (b) if (i) in performing its duties under this Trust Agreement the Property
Trustee is required to decide between alternative courses of action; or (ii) in
construing any of the provisions of this Trust Agreement the Property Trustee
finds the same ambiguous or inconsistent with other provisions contained herein;
or (iii) the Property Trustee is unsure of the application of any provision of
this Trust Agreement, then, except as to any matter as to which the Preferred
Securityholders are entitled to vote under the terms of this Trust Agreement,
the Property Trustee shall deliver a notice to the Depositor requesting written
instructions of the Depositor as to the course of action to be taken and the
Property Trustee shall take such action, or refrain from taking such action, as
the Property Trustee shall be instructed in writing to take, or to refrain from
taking, by the Depositor; provided, however, that if the Property Trustee does
not receive such instructions of the Depositor within 10 Business Days after it
has delivered such notice, or such reasonably shorter period of time set forth
in such notice (which to the extent practicable shall not be less than 2
Business Days), it may, but shall be under no duty to, take or refrain from
taking such action not inconsistent

                                      25

 
with this Trust Agreement as it shall deem advisable and in the best interests
of the Securityholders, in which event the Property Trustee shall have no
liability except for its own bad faith, negligence or willful misconduct;

  (c) any direction or act of the Depositor or the Administrative Trustees
contemplated by this Trust Agreement shall be sufficiently evidenced by an
Officers' Certificate;

  (d) whenever in the administration of this Trust Agreement, the Property
Trustee shall deem it desirable that a matter be established before undertaking,
suffering or omitting any action hereunder, the Property Trustee (unless other
evidence is herein specifically prescribed) may, in the absence of bad faith on
its part, request and conclusively rely upon an Officer's Certificate which,
upon receipt of such request, shall be promptly delivered by the Depositor or
the Administrative Trustees;

  (e) the Property Trustee shall have no duty to see to any recording, filing or
registration of any instrument (including any financing or continuation
statement, any filing under tax or securities laws or any filing under tax or
securities laws) or any rerecording, refiling or reregistration thereof;

  (f) the Property Trustee may consult with counsel of its choice (which counsel
may be counsel to the Depositor or any of its Affiliates) 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 Property Trustee shall
have the right at any time to seek instructions concerning the administration of
this Trust Agreement from any court of competent jurisdiction;

  (g) the Property Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Trust Agreement at the request or
direction of any of the Securityholders pursuant to this Trust Agreement, unless
such Securityholders shall have offered to the Property Trustee reasonable
security or indemnity against the costs, expenses and liabilities which might be
incurred by it in compliance with such request or direction;

  (h) the Property Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, report, notice, request, consent, order, approval, bond, debenture,
note or other evidence of indebtedness or other paper or document, unless
requested in writing to do so by one or more Securityholders, but the Property
Trustee may make such further inquiry or investigation into such facts or
matters as it may see fit;

  (i) the Property Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through its agents or
attorneys, provided that the Property Trustee shall be responsible for its own
negligence or recklessness with respect to selection of any agent or attorney
appointed by it hereunder;

  (j) whenever in the administration of this Trust Agreement the Property
Trustee shall deem it desirable to receive instructions with respect to
enforcing any remedy or right or taking any other action hereunder the Property
Trustee (i) may request instructions from the Holders of the Trust Securities
which instructions may only be given by the Holders of the same proportion in
Liquidation Amount of the Trust Securities as would be entitled to direct the
Property Trustee under the terms of the Trust Securities in respect of such
remedy, right or action; (ii) may refrain from enforcing such remedy or right or
taking such other action until such instructions are received; and (iii) shall
be protected in acting in accordance with such instructions; and

  (k) except as otherwise expressly provided by this Trust Agreement, the
Property Trustee shall not be under any obligation to take any action that is
discretionary under the provisions of this Trust Agreement. No provision of this
Trust Agreement shall be deemed to impose any duty or obligation on the Property
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 Property 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 Property Trustee shall be construed to be a duty.

                                      26

 
 SECTION 804.  NOT RESPONSIBLE FOR RECITALS OR ISSUANCE OF SECURITIES.

  The Recitals contained herein and in the Trust Securities Certificates shall
be taken as the statements of the Trust, and the Trustees do not assume any
responsibility for their correctness. The Trustees shall not be accountable for
the use or application by the Depositor of the proceeds of the Debentures.

 SECTION 805.  MAY HOLD SECURITIES.

  Any Trustee or any other agent of any Trustee or the Trust, in its individual
or any other capacity, may become the owner or pledgee of Trust Securities and,
subject to Sections 808 and 813 and except as provided in the definition of the
term "Outstanding" in Article I, may otherwise deal with the Trust with the same
rights it would have if it were not a Trustee or such other agent.

 SECTION 806.  COMPENSATION; INDEMNITY; FEES.

 The Depositor agrees:

  (a) to pay to the Trustees from time to time 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);

  (b) except as otherwise expressly provided herein, to reimburse the Trustees
upon request for all reasonable expenses, disbursements and advances incurred or
made by the Trustees in accordance with any provision of this Trust Agreement
(including the reasonable compensation and the expenses and disbursements of its
agents and counsel), except any such expense, disbursement or advance as may be
attributable to such Trustee's negligence, bad faith or willful misconduct (or,
in the case of the Administrative Trustees or the Delaware Trustee, any such
expense, disbursement or advance as may be attributable to its, his or her gross
negligence, bad faith or willful misconduct); and

  (c) to indemnify each of the Trustees or any predecessor Trustee for, and to
hold the Trustees harmless against, any loss, damage, claims, liability, penalty
or expense incurred without negligence or bad faith on its part, arising out of
or in connection with the acceptance or administration of this Trust Agreement,
including the costs and expenses of defending itself against any claim or
liability in connection with the exercise or performance of any of its powers or
duties hereunder, except any such expense, disbursement or advance as may be
attributable to such Trustee's negligence, bad faith or willful misconduct (or,
in the case of the Administrative Trustees or the Delaware Trustee, any such
expense, disbursement or advance as may be attributable to its, his or her gross
negligence, bad faith or willful misconduct).

  No Trustee may claim any Lien or charge on any Trust Property as a result of
any amount due pursuant to this Section 806.

 SECTION 807.  CORPORATE PROPERTY TRUSTEE REQUIRED; ELIGIBILITY OF TRUSTEES.

  (a) There shall at all times be a Property Trustee hereunder with respect to
the Trust Securities. The Property Trustee shall be a Person that is eligible
pursuant to the Trust Indenture Act to act as such and has a combined capital
and surplus of at least $50,000,000. If any such Person publishes reports of
condition at least annually, pursuant to law or to the requirements of its
supervising or examining authority, then for the purposes of this Section 807,
the combined capital and surplus of such Person shall be deemed to be its
combined capital and surplus as set forth in its most recent report of condition
so published. If at any time the Property Trustee with respect to the Trust
Securities shall cease to be eligible in accordance with the provisions of this
Section 807, it shall resign immediately in the manner and with the effect
hereinafter specified in this Article VIII.

                                      27

 
  (b) There shall at all times be one or more Administrative Trustees hereunder
with respect to the Trust Securities. Each Administrative 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 persons authorized to bind that entity.

  (c) There shall at all times be a Delaware Trustee with respect to the Trust
Securities. The Delaware Trustee shall either be (i) a natural person who is at
least 21 years of age and a resident of the State of Delaware; or (ii) a legal
entity with its principal place of business in the State of Delaware and that
otherwise meets the requirements of applicable Delaware law that shall act
through one or more persons authorized to bind such entity.

 SECTION 808.  CONFLICTING INTERESTS.

  If the Property Trustee has or shall acquire a conflicting interest within the
meaning of the Trust Indenture Act, the Property Trustee shall either eliminate
such interest or resign, to the extent and in the manner provided by, and
subject to the provisions of, the Trust Indenture Act and this Trust Agreement.

 SECTION 809.  CO-TRUSTEES AND SEPARATE TRUSTEE.

  (a) Unless an Event of Default shall have occurred and be continuing, at any
time or times, for the purpose of meeting the legal requirements of the Trust
Indenture Act or of any jurisdiction in which any part of the Trust Property may
at the time be located, the Depositor shall have power to appoint, and upon the
written request of the Property Trustee, the Depositor shall for such purpose
join with the Property Trustee in the execution, delivery and performance of all
instruments and agreements necessary or proper to appoint, one or more Persons
approved by the Property Trustee either to act as co-trustee, jointly with the
Property Trustee, of all or any part of such Trust Property, or to the extent
required by law to act as separate trustee of any such property, in either case
with such powers as may be provided in the instrument of appointment, and to
vest in such Person or Persons in the capacity aforesaid, any property, title,
right or power deemed necessary or desirable, subject to the other provisions of
this Section 809. If the Depositor does not join in such appointment within 15
days after the receipt by it of a request so to do, or in case a Debenture Event
of Default has occurred and is continuing, the Property Trustee alone shall have
power to make such appointment. Any co-trustee or separate trustee appointed
pursuant to this Section 809 shall either be (i) a natural person who is at
least 21 years of age and a resident of the United States; or (ii) a legal
entity with its principal place of business in the United States that shall act
through one or more persons authorized to bind such entity.

  (b) Should any written instrument from the Depositor be required by any co-
trustee or separate trustee so appointed for more fully confirming to such co-
trustee or separate trustee such property, title, right, or power, any and all
such instruments shall, on request, be executed, acknowledged, and delivered by
the Depositor.

  (c) Every co-trustee or separate trustee shall, to the extent permitted by
law, but to such extent only, be appointed subject to the following terms,
namely:

     (i) The Trust Securities shall be executed and delivered and all rights,
powers, duties and obligations hereunder in respect of the custody of
securities, cash and other personal property held by, or required to be
deposited or pledged with, the Trustees specified hereunder, shall be exercised,
solely by such Trustees and not by such co-trustee or separate trustee.

     (ii) The rights, powers, duties and obligations hereby conferred or imposed
upon the Property Trustee in respect of any property covered by such appointment
shall be conferred or imposed upon and exercised or performed by the Property
Trustee or by the Property Trustee and such co-trustee or separate trustee
jointly, as shall be provided in the instrument appointing such co-trustee or
separate trustee, except to the extent that under any law of any jurisdiction in
which any particular act is to be performed, the Property Trustee shall be
incompetent or unqualified to perform such act, in which event such rights,
powers, duties and obligations shall be exercised and performed by such co-
trustee or separate trustee.

                                      28

 
     (iii) The Property Trustee at any time, by an instrument in writing
executed by it, with the written concurrence of the Depositor, may accept the
resignation of or remove any co-trustee or separate trustee appointed under this
Section 809, and, in case a Debenture Event of Default has occurred and is
continuing, the Property Trustee shall have the power to accept the resignation
of, or remove, any such co-trustee or separate trustee without the concurrence
of the Depositor. Upon the written request of the Property Trustee, the
Depositor shall join with the Property Trustee in the execution, delivery and
performance of all instruments and agreements necessary or proper to effectuate
such resignation or removal. A successor to any co-trustee or separate trustee
so resigned or removed may be appointed in the manner provided in this Section
809.

     (iv)  No co-trustee or separate trustee hereunder shall be personally 
liable by reason of any act or omission of the Property Trustee or any other
trustee hereunder.

     (v)   The Property Trustee shall not be liable by reason of any act of a 
co-trustee or separate trustee.

     (vi)  Any Act of Holders delivered to the Property Trustee shall be deemed
to have been delivered to each such co-trustee and separate trustee.

 SECTION 810.  RESIGNATION AND REMOVAL; APPOINTMENT OF SUCCESSOR.

  (a) No resignation or removal of any Trustee (the "Relevant Trustee") and no
appointment of a successor Trustee pursuant to this Article VIII shall become
effective until the acceptance of appointment by the successor Trustee in
accordance with the applicable requirements of Section 811.

  (b) Subject to the immediately preceding paragraph, the Relevant Trustee may
resign at any time with respect to the Trust Securities by giving written notice
thereof to the Securityholders. If the instrument of acceptance by the successor
Trustee required by Section 811 shall not have been delivered to the Relevant
Trustee within 30 days after the giving of such notice of resignation, the
Relevant Trustee may petition, at the expense of the Depositor, any court of
competent jurisdiction for the appointment of a successor Relevant Trustee with
respect to the Trust Securities.

  (c) Unless a Debenture Event of Default shall have occurred and be continuing,
any Trustee may be removed at any time by Act of the Common Securityholder. If a
Debenture Event of Default shall have occurred and be continuing, the Property
Trustee or the Delaware Trustee, or both of them, may be removed at such time by
Act of the Holders of a majority in Liquidation Amount of the Preferred
Securities, delivered to the Relevant Trustee (in its individual capacity and on
behalf of the Trust). An Administrative Trustee may be removed by the Common
Securityholder at any time.

  (d) If any Trustee shall resign, be removed or become incapable of acting as
Trustee, or if a vacancy shall occur in the office of any Trustee for any cause,
at a time when no Debenture Event of Default shall have occurred and be
continuing, the Common Securityholder, by Act of the Common Securityholder
delivered to the retiring Trustee, shall promptly appoint a successor Trustee or
Trustees with respect to the Trust Securities and the Trust, and the successor
Trustee shall comply with the applicable requirements of Section 811. If the
Property Trustee or the Delaware Trustee shall resign, be removed or become
incapable of continuing to act as the Property Trustee or the Delaware Trustee,
as the case may be, at a time when a Debenture Event of Default shall have
occurred and is continuing, the Preferred Securityholders, by Act of the
Securityholders of a majority in Liquidation Amount of the Preferred Securities
then Outstanding delivered to the retiring Relevant Trustee, shall promptly
appoint a successor Relevant Trustee or Trustees with respect to the Trust
Securities and the Trust, and such successor Trustee shall comply with the
applicable requirements of Section 811. If an Administrative Trustee shall
resign, be removed or become incapable of acting as Administrative Trustee, at a
time when a Debenture Event of Default shall have occurred and be continuing,
the Common Securityholder, by Act of the Common Securityholder delivered to an
Administrative Trustee, shall promptly appoint a successor Administrative
Trustee or Administrative Trustees with respect to the Trust Securities and the
Trust, and such successor Administrative Trustee or Administrative Trustees
shall comply with the applicable requirements of Section 811. If no successor
Relevant Trustee with respect to the

                                      29

 
Trust Securities shall have been so appointed by the Common Securityholder or
the Preferred Securityholders and accepted appointment in the manner required by
Section 811, any Securityholder who has been a Securityholder of Trust
Securities on behalf of himself and all others similarly situated may petition a
court of competent jurisdiction for the appointment of a successor Relevant
Trustee with respect to the Trust Securities.

  (e) The Property Trustee shall give notice of each resignation and each
removal of a Trustee and each appointment of a successor Trustee to all
Securityholders in the manner provided in Section 1008 and shall give notice to
the Depositor. Each notice shall include the name of the successor Relevant
Trustee and the address of its Corporate Trust Office if it is the Property
Trustee.

  (f) Notwithstanding the foregoing or any other provision of this Trust
Agreement, in the event any Administrative Trustee or a Delaware Trustee who is
a natural person dies or becomes, in the opinion of the Depositor, incompetent
or incapacitated, the vacancy created by such death, incompetence or incapacity
may be filled by (a) the unanimous act of remaining Administrative Trustees if
there are at least two of them; or (b) otherwise by the Depositor (with the
successor in each case being a Person who satisfies the eligibility requirement
for Administrative Trustees set forth in Section 807).

 SECTION 811.  ACCEPTANCE OF APPOINTMENT BY SUCCESSOR.

  (a) In case of the appointment hereunder of a successor Relevant Trustee with
respect to the Trust Securities and the Trust, the retiring Relevant Trustee and
each successor Relevant Trustee with respect to the Trust Securities shall
execute and deliver an instrument 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, trusts and duties of the
retiring Relevant Trustee with respect to the Trust Securities and the Trust and
upon the execution and delivery of such instrument 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, trusts and
duties of the retiring Relevant Trustee with respect to the Trust Securities and
the Trust; but, on request of the Trust or any successor Relevant Trustee such
retiring Relevant Trustee shall duly assign, transfer and deliver to such
successor Relevant Trustee all Trust Property, all proceeds thereof and money
held by such retiring Relevant Trustee hereunder with respect to the Trust
Securities and the Trust.

  (b) Upon request of any such successor Relevant Trustee, the Trust shall
execute any and all instruments for more fully and certainly vesting in and
confirming to such successor Relevant Trustee all such rights, powers and trusts
referred to in the immediately preceding paragraph, as the case may be.

  (c) No successor Relevant Trustee shall accept its appointment unless at the
time of such acceptance such successor Relevant Trustee shall be qualified and
eligible under this Article VIII.

 SECTION 812.  MERGER, CONVERSION, CONSOLIDATION OR SUCCESSION TO BUSINESS.

  Any Person into which the Property Trustee, the Delaware Trustee or any
Administrative Trustee may be merged or converted or with which it may be
consolidated, or any Person resulting from any merger, conversion or
consolidation to which such Relevant Trustee shall be a party, or any
corporation succeeding to all or substantially all the corporate trust business
of such Relevant Trustee, shall be the successor of such Relevant Trustee
hereunder, provided such Person shall be otherwise qualified and eligible under
this Article VIII, without the execution or filing of any paper or any further
act on the part of any of the parties hereto.

 SECTION 813.  PREFERENTIAL COLLECTION OF CLAIMS AGAINST DEPOSITOR OR TRUST.

  If and when the Property Trustee or the Delaware Trustee shall be or become a
creditor of the Depositor or the Trust (or any other obligor upon the Debentures
or the Trust Securities), the Property Trustee or the Delaware

                                      30

 
Trustee, as the case may be, shall be subject to and shall take all actions
necessary in order to comply with the provisions of the Trust Indenture Act
regarding the collection of claims against the Depositor or Trust (or any such
other obligor).

 SECTION 814.  REPORTS BY PROPERTY TRUSTEE.

  (a) The Property Trustee shall transmit to Securityholders such reports
concerning the Property Trustee, its actions under this Trust Agreement, and the
property and funds in its possession as Property Trustee as may be required
pursuant to the Trust Indenture Act, at the times and in the manner provided
pursuant thereto.

  (b) A copy of each such report shall, at the time of such transmission to
Holders, be filed by the Property Trustee with The Nasdaq Stock Market's
National Market, and each national securities exchange or other organization
upon which the Trust Securities are listed, and also with the Commission and the
Depositor.

 SECTION 815.  REPORTS TO THE PROPERTY TRUSTEE.

  The Depositor and the Administrative Trustees on behalf of the Trust shall
provide to the Property Trustee such documents, reports and information as
required by Section 314 of the Trust Indenture Act (if any) and the compliance
certificate required by Section 314(a) of the Trust Indenture Act in the form,
in the manner and at the times required by Section 314 of the Trust Indenture
Act.

 SECTION 816.  EVIDENCE OF COMPLIANCE WITH CONDITIONS PRECEDENT.

  Each of the Depositor and the Administrative Trustees on behalf of the Trust
shall provide to the Property Trustee such evidence of compliance with any
conditions precedent, if any, provided for in this Trust Agreement that relate
to any of the matters set forth in Section 314(c) of the Trust Indenture Act.
Any certificate or opinion required to be given by an officer pursuant to
Section 314(c)(1) of the Trust Indenture Act shall be given in the form of an
Officers' Certificate.

 SECTION 817.  NUMBER OF TRUSTEES.

  (a) The number of Trustees shall be five, provided that the Holder of all of
the Common Securities by written instrument may increase or decrease the number
of Administrative Trustees. The Property Trustee and the Delaware Trustee may be
the same Person.

  (b) If a Trustee ceases to hold office for any reason and the number of
Administrative Trustees is not reduced pursuant to Section 817(a), or if the
number of Trustees is increased pursuant to Section 817(a), a vacancy shall
occur. The vacancy shall be filled with a Trustee appointed in accordance with
Section 810.

  (c) The death, resignation, retirement, removal, bankruptcy, incompetence or
incapacity to perform the duties of a Trustee shall not operate to annul the
Trust. Whenever a vacancy in the number of Administrative Trustees shall occur,
until such vacancy is filled by the appointment of an Administrative Trustee in
accordance with Section 810, the Administrative Trustees in office, regardless
of their number (and notwithstanding any other provision of this Agreement),
shall have all the powers granted to the Administrative Trustees and shall
discharge all the duties imposed upon the Administrative Trustees by this Trust
Agreement.

 SECTION 818.  DELEGATION OF POWER.

  (a) Any Administrative Trustee may, by power of attorney consistent with
applicable law, delegate to any other natural person over the age of 21 his or
her power for the purpose of executing any documents contemplated in Section
207(a); and

                                      31

 
  (b) The Administrative Trustees shall have power to delegate from time to time
to such of their number or to the Depositor the doing of such things and the
execution of such instruments either in the name of the Trust or the names of
the Administrative Trustees or otherwise as the Administrative Trustees may deem
expedient, to the extent such delegation is not prohibited by applicable law or
contrary to the provisions of the Trust, as set forth herein.

 SECTION 819.  VOTING.

  Except as otherwise provided in this Trust Agreement, the consent or approval
of the Administrative Trustees shall require consent or approval by not less
than a majority of the Administrative Trustees, unless there are only two, in
which case both must consent.

                                   ARTICLE IX

                      TERMINATION, LIQUIDATION AND MERGER

 SECTION 901.  TERMINATION UPON EXPIRATION DATE.

  Unless earlier dissolved, the Trust shall automatically dissolve on March 31,
2051 (the "Expiration Date") subject to distribution of the Trust Property in
accordance with Section 904.

 SECTION 902.  EARLY TERMINATION.

 The first to occur of any of the following events is an "Early Termination
Event:"

  (a) the occurrence of a Bankruptcy Event in respect of, or the dissolution or
liquidation of, the Depositor;

  (b) delivery of written direction to the Property Trustee by the Depositor at
any time (which direction is wholly optional and within the discretion of the
Depositor) to dissolve the Trust and distribute the Debentures to
Securityholders in exchange for the Preferred Securities in accordance with
Section 904;

  (c) the redemption of all of the Preferred Securities in connection with the
redemption of all of the Debentures; and

  (d) the entrance of an order for dissolution of the Trust by a court of
competent jurisdiction.

 SECTION 903.  TERMINATION.

  The respective obligations and responsibilities of the Trustees and the Trust
created and continued hereby shall terminate upon the latest to occur of the
following:  (a) the distribution by the Property Trustee to Securityholders upon
the liquidation of the Trust pursuant to Section 904, or upon the redemption of
all of the Trust Securities pursuant to Section 402, of all amounts required to
be distributed hereunder upon the final payment of the Trust Securities; (b) the
payment of any expenses owed by the Trust; (c) the discharge of all
administrative duties of the Administrative Trustees, including the performance
of any tax reporting obligations with respect to the Trust or the
Securityholders; and (d) the filing of a Certificate of Cancellation by the
Administrative Trustee under the Delaware Business Trust Act.

                                      32

 
 SECTION 904.  LIQUIDATION.

  (a) If an Early Termination Event specified in clause (a), (b), or (d) of
Section 902 occurs or upon the Expiration Date, the Trust shall be liquidated by
the Trustees as expeditiously as the Trustees determine to be possible by
distributing, after satisfaction of liabilities to creditors of the Trust as
provided by applicable law, to each Securityholder a Like Amount of Debentures,
subject to Section 904(d). Notice of liquidation shall be given by the Property
Trustee by first-class mail, postage prepaid, mailed not later than 30 nor more
than 60 days prior to the Liquidation Date to each Holder of Trust Securities at
such Holder's address appearing in the Securities Register. All notices of
liquidation shall:

     (i)   state the Liquidation Date;

     (ii)  state that from and after the Liquidation Date, the Trust Securities
shall no longer be deemed to be Outstanding and any Trust Securities
Certificates not surrendered for exchange shall be deemed to represent a Like
Amount of Debentures; and

     (iii) provide such information with respect to the mechanics by which
Holders may exchange Trust Securities Certificates for Debentures, or, if
Section 904(d) applies, receive a Liquidation Distribution, as the
Administrative Trustees or the Property Trustee shall deem appropriate.

  (b) Except where Section 902(c) or 904(d) applies, in order to effect the
liquidation of the Trust and distribution of the Debentures to Securityholders,
the Property Trustee shall establish a record date for such distribution (which
shall be not more than 45 days prior to the Liquidation Date) and, either itself
acting as exchange agent or through the appointment of a separate exchange
agent, shall establish such procedures as it shall deem appropriate to effect
the distribution of Debentures in exchange for the Outstanding Trust Securities
Certificates.

  (c) Except where Section 902(c) or 904(d) applies, after the Liquidation Date,
(i) the Trust Securities shall no longer be deemed to be outstanding; (ii)
certificates representing a Like Amount of Debentures shall be issued to holders
of Trust Securities Certificates upon surrender of such certificates to the
Administrative Trustees or their agent for exchange; (iii) the Depositor shall
use its reasonable efforts to have the Debentures listed on The Nasdaq Stock
Market's National Market or on such other securities exchange or other
organization as the Preferred Securities are then listed or traded; (iv) any
Trust Securities Certificates not so surrendered for exchange shall be deemed to
represent a Like Amount of Debentures, accruing interest at the rate provided
for in the Debentures from the last Distribution Date on which a Distribution
was made on such Trust Securities Certificates until such certificates are so
surrendered (and until such certificates are so surrendered, no payments of
interest or principal shall be made to holders of Trust Securities Certificates
with respect to such Debentures); and (v) all rights of Securityholders holding
Trust Securities shall cease, except the right of such Securityholders to
receive Debentures upon surrender of Trust Securities Certificates.

  (d) In the event that, notwithstanding the other provisions of this Section
904, whether because of an order for dissolution entered by a court of competent
jurisdiction or otherwise, distribution of the Debentures in the manner provided
herein is determined by the Property Trustee not to be practical, the Trust
Property shall be liquidated, and the Trust shall be dissolved, wound-up or
terminated, by the Property Trustee in such manner as the Property Trustee
determines. In such event, on the date of the dissolution, winding-up or other
termination of the Trust, Securityholders shall be entitled to receive out of
the assets of the Trust available for distribution to Securityholders, after
satisfaction of liabilities to creditors of the Trust as provided by applicable
law, an amount equal to the Liquidation Amount per Trust Security plus
accumulated and unpaid Distributions thereon to the date of payment (such amount
being the "Liquidation Distribution"). If, upon any such dissolution, winding-up
or termination, the Liquidation Distribution can be paid only in part because
the Trust has insufficient assets available to pay in full the aggregate
Liquidation Distribution, then, subject to the next succeeding sentence, the
amounts payable by the Trust on the Trust Securities shall be paid on a pro rata
basis (based upon Liquidation Amounts). The holder of the Common Securities
shall be entitled to receive Liquidation Distributions upon any such
dissolution, winding-up or

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termination pro rata (determined as aforesaid) with Holders of Preferred
Securities, except that, if a Debenture Event of Default has occurred and is
continuing, the Preferred Securities shall have a priority over the Common
Securities.

 SECTION 905.  MERGERS, CONSOLIDATIONS, AMALGAMATIONS OR REPLACEMENTS OF THE
TRUST.

  The Trust may not merge with or into, consolidate, amalgamate, or be replaced
by, or convey, transfer or lease its properties and assets substantially as an
entirety to any corporation or other Person, except pursuant to this Section
905. At the request of the Depositor, with the consent of the Administrative
Trustees and without the consent of the holders of the Preferred Securities, the
Property Trustee or the Delaware Trustee, the Trust may merge with or into,
consolidate, amalgamate, be replaced by or convey, transfer or lease its
properties and assets substantially as an entirety to a trust organized as such
under the laws of any State; provided, that (i) such successor entity either (a)
expressly assumes all of the obligations of the Trust with respect to the
Preferred Securities; or (b) substitutes for the Preferred Securities other
securities having substantially the same terms as the Preferred Securities (the
"Successor Securities") so long as the Successor Securities rank the same as the
Preferred Securities rank in priority with respect to distributions and payments
upon liquidation, redemption and otherwise; (ii) the Depositor expressly
appoints a trustee of such successor entity possessing substantially the same
powers and duties as the Property Trustee as the holder of the Debentures; (iii)
the Successor Securities are listed or traded, or any Successor Securities shall
be listed or traded upon notification of issuance, on any national securities
exchange or other organization on which the Preferred Securities are then
listed, if any; (iv) such merger, consolidation, amalgamation, replacement,
conveyance, transfer or lease does not adversely affect the rights, preferences
and privileges of the holders of the Preferred Securities (including any
Successor Securities) in any material respect; (v) prior to such merger,
consolidation, amalgamation, replacement, conveyance, transfer or lease, the
Depositor has received an Opinion of Counsel to the effect that (a) such merger,
consolidation, amalgamation, replacement, conveyance, transfer or lease does not
adversely affect the rights, preferences and privileges of the holders of the
Preferred Securities (including any Successor Securities) in any material
respect; and (b) following such merger, consolidation, amalgamation,
replacement, conveyance, transfer or lease, neither the Trust nor such successor
entity shall be required to register as an "investment company" under the
Investment Company Act; and (vi) the Depositor owns all of the Common Securities
of such successor entity and guarantees the obligations of such successor entity
under the Successor Securities at least to the extent provided by the Guarantee,
the Debentures, the Indenture, this Trust Agreement and the Expense Agreement.
Notwithstanding the foregoing, the Trust shall not, except with the consent of
holders of 100% in Liquidation Amount of the Preferred Securities, 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 other Person or
permit any other Person to consolidate, amalgamate, merge with or into, or
replace it if such consolidation, amalgamation, merger or replacement would
cause the Trust or the successor entity to be classified as other than a grantor
trust for United States federal income tax purposes.

                                   ARTICLE X

                            MISCELLANEOUS PROVISIONS

SECTION 1001.  LIMITATION OF RIGHTS OF SECURITYHOLDERS.

  The death or incapacity of any Person having an interest, beneficial or
otherwise, in Trust Securities shall not operate to terminate this Trust
Agreement, nor entitle the legal representatives or heirs of such Person or any
Securityholder for such Person, to claim an accounting, take any action or bring
any proceeding in any court for a partition or winding-up of the arrangements
contemplated hereby, nor otherwise affect the rights, obligations and
liabilities of the parties hereto or any of them.

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 SECTION 1002.  AMENDMENT.

  (a) This Trust Agreement may be amended from time to time by the Trustees and
the Depositor, without the consent of any Securityholders, (i) as provided in
Section 811 with respect to acceptance of appointment by a successor Trustee;
(ii) to cure any ambiguity, correct or supplement any provision herein or
therein which may be inconsistent with any other provision herein or therein, or
to make any other provisions with respect to matters or questions arising under
this Trust Agreement, that shall not be inconsistent with the other provisions
of this Trust Agreement; or (iii) to modify, eliminate or add to any provisions
of this Trust Agreement to such extent as shall be necessary to ensure that the
Trust shall be classified for United States federal income tax purposes as a
grantor trust at all times that any Trust Securities are outstanding or to
ensure that the Trust shall not be required to register as an "investment
company" under the Investment Company Act; provided, however, that in the case
of clause (ii), such action shall not adversely affect in any material respect
the interests of any Securityholder, and any amendments of this Trust Agreement
shall become effective when notice thereof is given to the Securityholders.

  (b) Except as provided in Section 601(c) or Section 1002(c) hereof, any
provision of this Trust Agreement may be amended by the Trustees and the
Depositor (i) with the consent of Trust Securityholders representing not less
than a majority (based upon Liquidation Amounts) of the Trust Securities then
Outstanding; and (ii) upon receipt by the Trustees of an Opinion of Counsel to
the effect that such amendment or the exercise of any power granted to the
Trustees in accordance with such amendment shall not affect the Trust's status
as a grantor trust for United States federal income tax purposes or the Trust's
exemption from status of an "investment company" under the Investment Company
Act.

  (c) In addition to and notwithstanding any other provision in this Trust
Agreement, without the consent of each affected Securityholder (such consent
being obtained in accordance with Section 603 or 606 hereof), this Trust
Agreement may not be amended to (i) change the amount or timing of any
Distribution on the Trust Securities or otherwise adversely affect the amount of
any Distribution required to be made in respect of the Trust Securities as of a
specified date; or (ii) restrict the right of a Securityholder to institute suit
for the enforcement of any such payment on or after such date.  Notwithstanding
any other provision herein, without the unanimous consent of the Securityholders
(such consent being obtained in accordance with Section 603 or 606 hereof), this
paragraph (c) of this Section 1002 may not be amended.

  (d) Notwithstanding any other provisions of this Trust Agreement, no Trustee
shall enter into or consent to any amendment to this Trust Agreement which would
cause the Trust to fail or cease to qualify for the exemption from status of an
"investment company" under the Investment Company Act or to fail or cease to be
classified as a grantor trust for United States federal income tax purposes.

  (e) Notwithstanding anything in this Trust Agreement to the contrary, without
the consent of the Depositor, this Trust Agreement may not be amended in a
manner which imposes any additional obligation on the Depositor.

  (f) In the event that any amendment to this Trust Agreement is made, the
Administrative Trustees shall promptly provide to the Depositor a copy of such
amendment.

  (g) Neither the Property Trustee nor the Delaware Trustee shall be required to
enter into any amendment to this Trust Agreement which affects its own rights,
duties or immunities under this Trust Agreement. The Property Trustee shall be
entitled to receive an Opinion of Counsel and an Officers' Certificate stating
that any amendment to this Trust Agreement is in compliance with this Trust
Agreement.

 SECTION 1003.  SEPARABILITY.

  In case any provision in this Trust Agreement or in the Trust Securities
Certificates shall be invalid, illegal or unenforceable, the validity, legality
and enforceability of the remaining provisions shall not in any way be affected
or impaired thereby.

                                      35

 
 SECTION 1004.  GOVERNING LAW.

  THIS TRUST AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF EACH OF THE
SECURITYHOLDERS, THE TRUST AND THE TRUSTEES WITH RESPECT TO THIS TRUST AGREEMENT
AND THE TRUST SECURITIES SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY
THE LAWS OF THE STATE OF DELAWARE (WITHOUT REGARD TO CONFLICT OF LAWS
PRINCIPLES).

 SECTION 1005.  PAYMENTS DUE ON NON-BUSINESS DAY.

  If the date fixed for any payment on any Trust Security shall be a day that is
not a Business Day, then such payment need not be made on such date but may be
made on the next succeeding day which is a Business Day, with the same force and
effect as though made on the date fixed for such payment, and no distribution
shall accumulate thereon for the period after such date.

 SECTION 1006.  SUCCESSORS.

  This Trust Agreement shall be binding upon and shall inure to the benefit of
any successor to the Depositor, the Trust or the Relevant Trustee(s), including
any successor by operation of law. Except in connection with a consolidation,
merger or sale involving the Depositor that is permitted under Article XII of
the Indenture and pursuant to which the assignee agrees in writing to perform
the Depositor's obligations hereunder, the Depositor shall not assign its
obligations hereunder.

 SECTION 1007.  HEADINGS.

  The Article and Section headings are for convenience only and shall not affect
the construction of this Trust Agreement.

 SECTION 1008.  REPORTS, NOTICES AND DEMANDS.

  Any report, notice, demand or other communication  which by any provision of
this Trust Agreement is required or permitted to be given or served to or upon
any Securityholder or the Depositor may be given or served in writing by deposit
thereof, first-class postage prepaid, in the United States mail, hand delivery
or facsimile transmission, in each case, addressed, (a) in the case of a
Preferred Securityholder, to such Preferred Securityholder as such
Securityholder's name and address may appear on the Securities Register; and (b)
in the case of the Common Securityholder or the Depositor, to Southwest Bancorp,
Inc., 608 South Main Street, Stillwater, Oklahoma, Attention: Mr. Kerby Crowell,
facsimile no.: (405) 377-3808. Any notice to Preferred Securityholders shall
also be given to such owners as have, within two years preceding the giving of
such notice, filed their names and addresses with the Property Trustee for that
purpose. Such notice, demand or other communication to or upon a Securityholder
shall be deemed to have been sufficiently given or made, for all purposes, upon
hand delivery, mailing or transmission.

  Any notice, demand or other communication which by any provision of this Trust
Agreement is required or permitted to be given or served to or upon the Trust,
the Property Trustee or the Administrative Trustees shall be given in writing
addressed (until another address is published by the Trust) as follows: (a) with
respect to the Property Trustee to State Street Bank and Trust Company, Two
International Place, 4th Floor, Boston, Massachusetts 02110, Attention:
Corporate Trust Department; (b) with respect to the Delaware Trustee, to
Wilmington Trust Company, Rodney Square North, 1100 North Market Street,
Wilmington, Delaware 19890-0001, Attention: Corporate Trust Administration; and
(c) with respect to the Administrative Trustees, to them at the address above
for notices to the Depositor, marked "Attention: Administrative Trustees of SBI
Capital Trust." Such notice, demand or other communication to or upon the Trust
or the Property Trustee shall be deemed to have been sufficiently given or made
only upon actual receipt of the writing by the Trust or the Property Trustee.

                                      36

 
 SECTION 1009.  AGREEMENT NOT TO PETITION.

  Each of the Trustees and the Depositor agree for the benefit of the
Securityholders that, until at least one year and 1 day after the Trust has been
terminated in accordance with Article IX, they shall not file, or join in the
filing of, a petition against the Trust under any bankruptcy, insolvency,
reorganization or other similar law (including, without limitation, the United
States Bankruptcy Code of 1978, as amended) (collectively, "Bankruptcy Laws") or
otherwise join in the commencement of any proceeding against the Trust under any
Bankruptcy Law. In the event the Depositor takes action in violation of this
Section 1009, the Property Trustee agrees, for the benefit of Securityholders,
that at the expense of the Depositor (which expense shall be paid prior to the
filing), it shall file an answer with the bankruptcy court or otherwise properly
contest the filing of such petition by the Depositor against the Trust or the
commencement of such action and raise the defense that the Depositor has agreed
in writing not to take such action and should be stopped and precluded
therefrom. The provisions of this Section 1009 shall survive the termination of
this Trust Agreement.

 SECTION 1010.  TRUST INDENTURE ACT; CONFLICT WITH TRUST INDENTURE ACT.

  (a) This Trust Agreement is subject to the provisions of the Trust Indenture
Act that are required to be part of this Trust Agreement and shall, to the
extent applicable, be governed by such provisions.

  (b) The Property Trustee shall be the only Trustee which is a trustee for the
purposes of the Trust Indenture Act.

  (c) If any provision hereof limits, qualifies or conflicts with another
provision hereof which is required to be included in this Trust Agreement by any
of the provisions of the Trust Indenture Act, such required provision shall
control. If any provision of this Trust Agreement modifies or excludes any
provision of the Trust Indenture Act which may be so modified or excluded, the
latter provision shall be deemed to apply to this Trust Agreement as so modified
or to be excluded, as the case may be.

  (d) The application of the Trust Indenture Act to this Trust Agreement shall
not affect the nature of the Trust Securities as equity securities representing
undivided beneficial interests in the assets of the Trust.

                                      37

 
 SECTION 1011.  ACCEPTANCE OF TERMS OF TRUST AGREEMENT, GUARANTEE AND INDENTURE.

  THE RECEIPT AND ACCEPTANCE OF A TRUST SECURITY OR ANY INTEREST THEREIN BY OR
ON BEHALF OF A SECURITYHOLDER OR ANY BENEFICIAL OWNER, WITHOUT ANY SIGNATURE OR
FURTHER MANIFESTATION OF ASSENT, SHALL CONSTITUTE THE UNCONDITIONAL ACCEPTANCE
BY THE SECURITYHOLDER AND ALL OTHERS HAVING A BENEFICIAL INTEREST IN SUCH TRUST
SECURITY OF ALL THE TERMS AND PROVISIONS OF THIS TRUST AGREEMENT AND AGREEMENT
TO THE SUBORDINATION PROVISIONS AND OTHER TERMS OF THE GUARANTEE AND THE
INDENTURE, AND SHALL CONSTITUTE THE AGREEMENT OF THE TRUST, SUCH SECURITYHOLDER
AND SUCH OTHERS THAT THE TERMS AND PROVISIONS OF THIS TRUST AGREEMENT SHALL BE
BINDING, OPERATIVE AND EFFECTIVE AS BETWEEN THE TRUST AND SUCH SECURITYHOLDER
AND SUCH OTHERS.

 
                        SOUTHWEST BANCORP, INC.                                 
                                                                                
                        By: /s/ Robert L. McCormick                             
                            --------------------------------------------------- 
                            Robert L. McCormick, President                      
                                                                                
                        STATE STREET BANK AND TRUST COMPANY,                    
                        as Property Trustee                                     
                                                                                
                        By: /s/ Paul D. Allen                                   
                            --------------------------------------------------- 
                            Paul D. Allen, Vice President                       
                                                                                
                        WILMINGTON TRUST COMPANY,                               
                        as Delaware Trustee                                     
                                                                                
                        By: /s/ Norma P. Closs                                  
                            --------------------------------------------------- 
                            Norma P. Closs, Vice President                      
                                                                                
                                                                                
                            /s/ Robert L. McCormick, Jr.                        
                            --------------------------------------------------- 
                            Robert L. McCormick, Jr., as Administrative Trustee 
                                                                                
                            /s/ Kerby E. Crowell                                
                            --------------------------------------------------- 
                            Kerby E. Crowell, as Administrative Trustee 
                                                                                
                            /s/ Deboarh T. Bradley                              
                            --------------------------------------------------- 
                            Deborah T. Bradley, as Administrative Trustee    

                                      38