Document:

<PAGE>

                                                                     Exhibit 4.4

                              GREATER BAY BANCORP
                                   as Issuer

                                   INDENTURE

                          Dated as of March 23, 2000

                             THE BANK OF NEW YORK
                                  as Trustee

                      JUNIOR SUBORDINATED DEBT SECURITIES
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                               TABLE OF CONTENTS
                               -----------------

<TABLE>
<CAPTION>
                                                                         Page
                                                                         ----
<S>                                                                      <C>
Parties.................................................................    1
Recitals................................................................    1
Authorization of Indenture..............................................    1
Compliance with Legal Requirements......................................    1
Purpose of and Consideration for Indenture..............................    1

                               ARTICLE I
                              DEFINITIONS

SECTION 1.01.  Definitions..............................................    1
         Additional Interest............................................    1
         Affiliate......................................................    1
         Authenticating Agent...........................................    2
         Bankruptcy Law.................................................    2
         Board of Directors.............................................    2
         Board Resolution...............................................    2
         Business Day...................................................    2
         Capital Securities.............................................    2
         Capital Securities Guarantee...................................    2
         Capital Treatment Event........................................    2
         Certificate....................................................    3
         Common Securities..............................................    3
         Company........................................................    3
         Comparable Treasury Issue......................................    3
         Comparable Treasury Price......................................    3
         Custodian......................................................    3
         Debt Security or Debt Securities...............................    3
         Debt Security Register.........................................    3
         Declaration....................................................    3
         Default........................................................    4
         Defaulted  Interest............................................    4
         Deferred Interest..............................................    4
         Event of Default...............................................    4
         Extension Period...............................................    4
         Federal Reserve................................................    4
         Finance Subsidiary.............................................    4
         Indenture......................................................    5
         Institutional Trustee..........................................    5
         Interest Payment Date..........................................    5
         Interest Rate..................................................    5
         Investment Company Event.......................................    5
         Liquidation Amount.............................................    5
         Maturity Date..................................................    5
         Officers' Certificate..........................................    5
</TABLE>
                                       i
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<TABLE>
<S>                                                                                                 <C>
         Opinion of Counsel......................................................................    5
         outstanding.............................................................................    5
         Person..................................................................................    6
         Predecessor Security....................................................................    6
         Primary Treasury Dealer.................................................................    6
         Principal Office of the Trustee.........................................................    6
         Quotation Agent.........................................................................    6
         Redemption Date.........................................................................    6
         Reference Treasury Dealer...............................................................    7
         Reference Treasury Dealer Quotations....................................................    7
         Remaining Life..........................................................................    7
         Responsible Officer.....................................................................    7
         Securityholder, holder of Debt Securities...............................................    7
         Senior Indebtedness.....................................................................    8
         Special Event...........................................................................    8
         Special Redemption Date.................................................................    8
         Special Redemption Price................................................................    8
         Subsidiary..............................................................................    8
         Tax Event...............................................................................    9
         Treasury Rate...........................................................................    9
         The Trust...............................................................................    9
         Trust Indenture Act.....................................................................    9
         Trust Securities........................................................................   10
         Trustee.................................................................................   10

                                                 ARTICLE II
                                              DEBT SECURITIES

SECTION 2.01.  Authentication and Dating.........................................................   10
SECTION 2.02.  Form of Trustee's Certificate of Authentication...................................   11
SECTION 2.03.  Form and Denomination of Debt Securities..........................................   11
SECTION 2.04.  Execution of Debt Securities......................................................   11
SECTION 2.05.  Exchange and Registration of Transfer of Debt Securities..........................   12
SECTION 2.06.  Mutilated, Destroyed, Lost or Stolen Debt Securities..............................   13
SECTION 2.07.  Temporary Debt Securities.........................................................   14
SECTION 2.08.  Payment of Interest...............................................................   15
SECTION 2.09.  Cancellation of Debt Securities Paid, etc.........................................   16
SECTION 2.10.  Computation of Interest...........................................................   16
SECTION 2.11.  Extension of Interest Payment Period..............................................   16
SECTION 2.12.  CUSIP Numbers.....................................................................   17

                                                 ARTICLE III
                                      PARTICULAR COVENANTS OF THE COMPANY

SECTION 3.01.  Payment of Principal, Premium and Interest; Agreed Treatment
                 of the Debt Securities and the Capital Securities...............................   18
SECTION 3.02.  Offices for Notices and Payments, etc.............................................   18
SECTION 3.03.  Appointments to Fill Vacancies in Trustee's Office................................   19
SECTION 3.04.  Provision as to Paying Agent......................................................   19
SECTION 3.05.  Certificate to Trustee............................................................   20
</TABLE>

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<TABLE>
<S>                                                                                                 <C>
SECTION 3.06.  Additional Sums...................................................................   20
SECTION 3.07.  Compliance with Consolidation Provisions..........................................   20
SECTION 3.08.  Limitation on Dividends...........................................................   21
SECTION 3.09.  Covenants as to the Trust.........................................................   21

                                          ARTICLE IV
                  SECURITYHOLDERS' LISTS AND REPORTS BY THE COMPANY AND THE TRUSTEE

SECTION 4.01.  Securityholders' Lists............................................................   22
SECTION 4.02.  Preservation and Disclosure of Lists..............................................   22

                                          ARTICLE V
                 REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS UPON AN EVENT OF DEFAULT

SECTION 5.01.  Events of Default.................................................................   23
SECTION 5.02.  Payment of Debt Securities on Default; Suit Therefor..............................   25
SECTION 5.03.  Application of Moneys Collected by Trustee........................................   26
SECTION 5.04.  Proceedings by Securityholders....................................................   27
SECTION 5.05.  Proceedings by Trustee............................................................   27
SECTION 5.06.  Remedies Cumulative and Continuing................................................   27
SECTION 5.07.  Direction of Proceedings and Waiver of Defaults by
                 Majority of Securityholders.....................................................   28
SECTION 5.08.  Notice of Defaults................................................................   28
SECTION 5.09.  Undertaking to Pay Costs..........................................................   29

                                          ARTICLE VI
                                    CONCERNING THE TRUSTEE

SECTION 6.01.  Duties and Responsibilities of Trustee............................................   29
SECTION 6.02.  Reliance on Documents, Opinions, etc..............................................   30
SECTION 6.03.  No Responsibility for Recitals, etc...............................................   31
SECTION 6.04.  Trustee, Authenticating Agent, Paying Agents, Transfer Agents or
                 Registrar May Own Debt Securities...............................................   32
SECTION 6.05.  Moneys to be Held in Trust........................................................   32
SECTION 6.06.  Compensation and Expenses of Trustee..............................................   32
SECTION 6.07.  Officers' Certificate as Evidence.................................................   33
SECTION 6.08.  Eligibility of Trustee............................................................   33
SECTION 6.09.  Resignation or Removal of Trustee.................................................   33
SECTION 6.10.  Acceptance by Successor Trustee...................................................   35
SECTION 6.11.  Succession by Merger, etc.........................................................   36
SECTION 6.12.  Authenticating Agents.............................................................   37

                                          ARTICLE VII
                                  CONCERNING THE SECURITYHOLDERS

SECTION 7.01.  Action by Securityholders.........................................................   38
SECTION 7.02.  Proof of Execution by Securityholders.............................................   38
SECTION 7.03.  Who Are Deemed Absolute Owners....................................................   39
SECTION 7.04.  Debt Securities Owned by Company Deemed Not Outstanding...........................   39
SECTION 7.05.  Revocation of Consents; Future Holders Bound......................................   39

                                          ARTICLE VIII
                                   SECURITYHOLDERS' MEETINGS

SECTION 8.01.  Purposes of Meetings..............................................................   40
</TABLE>

                                      iii
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<TABLE>
<S>                                                                                                 <C>
SECTION 8.02.  Call of Meetings by Trustee.......................................................   40
SECTION 8.03.  Call of Meetings by Company or Securityholders....................................   40
SECTION 8.04.  Qualifications for Voting.........................................................   41
SECTION 8.05.  Regulations.......................................................................   41
SECTION 8.06.  Voting............................................................................   41
SECTION 8.07.  Quorum; Actions...................................................................   42

                                           ARTICLE IX
                                   SUPPLEMENTAL INDENTURES

SECTION 9.01.  Supplemental Indentures without Consent of Securityholders........................   43
SECTION 9.02.  Supplemental Indentures with Consent of Securityholders...........................   44
SECTION 9.03.  Effect of Supplemental Indentures.................................................   45
SECTION 9.04.  Notation on Debt Securities.......................................................   45
SECTION 9.05.  Evidence of Compliance of Supplemental Indenture to be Furnished to
                 Trustee.........................................................................   45

                                           ARTICLE X
                                   REDEMPTION OF SECURITIES

SECTION 10.01.  Optional Redemption..............................................................   46
SECTION 10.02.  Special Event Redemption.........................................................   46
SECTION 10.03.  Notice of Redemption; Selection of Debt Securities...............................   46
SECTION 10.04.  Payment of Debt Securities Called for Redemption.................................   47

                                           ARTICLE XI
                         CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE

SECTION 11.01.  Company May Consolidate, etc., on Certain Terms..................................   47
SECTION 11.02.  Successor Entity to be Substituted...............................................   48
SECTION 11.03.  Opinion of Counsel to be Given to Trustee........................................   48

                                           ARTICLE XII
                             SATISFACTION AND DISCHARGE OF INDENTURE

SECTION 12.01.  Discharge of Indenture...........................................................   49
SECTION 12.02.  Deposited Moneys to be Held in Trust by Trustee..................................   49
SECTION 12.03.  Paying Agent to Repay Moneys Held................................................   49
SECTION 12.04.  Return of Unclaimed Moneys.......................................................   50

                                           ARTICLE XIII
                    IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS

SECTION 13.01.  Indenture and Debt Securities Solely Corporate Obligations.......................   50

                                           ARTICLE XIV
                                     MISCELLANEOUS PROVISIONS

SECTION 14.01.  Successors.......................................................................   50
SECTION 14.02.  Official Acts by Successor Entity................................................   50
SECTION 14.03.  Surrender of Company Powers......................................................   51
SECTION 14.04.  Addresses for Notices, etc.......................................................   51
SECTION 14.05.  Governing Law....................................................................   51
SECTION 14.06.  Evidence of Compliance with Conditions Precedent.................................   51
SECTION 14.07.  Non-Business Days................................................................   52
SECTION 14.08.  Table of Contents, Headings, etc.................................................   52
SECTION 14.09.  Execution in Counterparts........................................................   52
SECTION 14.10.  Separability.....................................................................   52
</TABLE>

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<TABLE>
<S>                                                                                                 <C>
SECTION 14.11.  Assignment.......................................................................   52
SECTION 14.12.  Acknowledgment of Rights.........................................................   52

                                               ARTICLE XV
                                   SUBORDINATION OF DEBT SECURITIES

SECTION 15.01.  Agreement to Subordinate.........................................................   53
SECTION 15.02.  Default on Senior Indebtedness...................................................   53
SECTION 15.03.  Liquidation; Dissolution; Bankruptcy.............................................   54
SECTION 15.04.  Subrogation......................................................................   55
SECTION 15.05.  Trustee to Effectuate Subordination..............................................   56
SECTION 15.06.  Notice by the Company............................................................   56
SECTION 15.07.  Rights of the Trustee; Holders of Senior Indebtedness............................   57
SECTION 15.08.  Subordination May Not Be Impaired................................................   57
</TABLE>

                                       v
<PAGE>

          THIS INDENTURE, dated as of March 23, 2000, between Greater Bay
Bancorp, a bank holding company incorporated in California (hereinafter
sometimes called the "Company"), and The Bank of New York, as trustee
(hereinafter sometimes called the "Trustee"),

                             W I T N E S S E T H :

          WHEREAS, for its lawful corporate purposes, the Company has duly
authorized the issuance of its 10 7/8% Junior Subordinated Deferrable
Interest Debentures due 2030 (the "Debt Securities") under this Indenture to
provide, among other things, for the execution and authentication, delivery and
administration thereof, the Company has duly authorized the execution of this
Indenture; and

          WHEREAS, all acts and things necessary to make this Indenture a valid
agreement according to its terms, have been done and performed;

          NOW, THEREFORE, This Indenture Witnesseth:

          In consideration of the premises, and the purchase of the Debt
Securities by the holders thereof, the Company covenants and agrees with the
Trustee for the equal and proportionate benefit of the respective holders from
time to time of the Debt Securities as follows:

                                   ARTICLE I
                                  DEFINITIONS

          SECTION 1.01.  Definitions
          --------------------------

          The terms defined in this Section 1.01 (except as herein otherwise
expressly provided or unless the context otherwise requires) for all purposes of
this Indenture and of any indenture supplemental hereto shall have the
respective meanings specified in this Section 1.01. All accounting terms used
herein and not expressly defined shall have the meanings assigned to such terms
in accordance with generally accepted accounting principles and the term
"generally accepted accounting principles" means such accounting principles as
are generally accepted at the time of any computation.  The words "herein,"
"hereof" and "hereunder" and other words of similar import refer to this
Indenture as a whole and not to any particular Article, Section or other
subdivision.

          "Additional Interest" shall have the meaning set forth in Section
3.06.

          "Affiliate" means, with respect to a specified Person, any Person
directly or indirectly controlling or controlled by, or under direct or indirect
common control with the specified Person.  For purposes of this definition,
"control" when used with respect to any Person means the power to direct the
management and policies of such Person, directly or indirectly, whether through
the ownership of voting securities, by contract or otherwise.

                                       1
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          "Allocable Amounts," when used with respect to any Senior
Indebtedness, means all amounts due or to become due on such Senior Indebtedness
less, if applicable, any amount which would have been paid to, and retained by,
the holders of such Senior Indebtedness (whether as a result of the receipt of
payments by the holders of such Senior Indebtedness from the Company or any
other obligor thereon or from an holders of, or trustee in respect of, other
indebtedness that is subordinate and junior in right of payment to such Senior
Indebtedness pursuant to any provision of such indebtedness for the payment over
of amounts received on account of such indebtedness to the holders of such
Senior Indebtedness or otherwise) but for the fact that such Senior Indebtedness
is subordinate or junior in right of payment to (or subject to a requirement
that amounts received on such Senior Indebtedness be paid over to obligees on)
trade accounts payable or accrued liabilities arising in the ordinary course of
business.

          "Authenticating Agent" means any agent or agents of the Trustee which
at the time shall be appointed and acting pursuant to Section 6.12.

          "Bankruptcy Law" means Title 11, U.S. Code, or any similar federal or
state law for the relief of debtors.

          "Board of Directors" means the board of directors or the executive
committee or any other duly authorized designated officers of the Company.

          "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors and to be in full force and effect on the date of such
certification and delivered to the Trustee.

          "Business Day" means any day other than a Saturday, Sunday or any
other day on which banking institutions in New York City are permitted or
required by any applicable law to close.

          "Capital Securities" means undivided beneficial interests in the
assets of GBB Capital III which rank pari passu with Common Securities issued by
GBB Capital III; provided, however, that upon the occurrence of an Event of
                 --------  -------
Default (as defined in the Declaration), the rights of holders of such Common
Securities to payment in respect of distributions and payments upon liquidation,
redemption and otherwise are subordinated to the rights of holders of such
Capital Securities.

          "Capital Securities Guarantee" means, in respect of the guarantee that
the Company may enter into with The Bank of New York or other Persons that
operates directly or indirectly for the benefit of holders of Capital Securities
of GBB Capital III.

          "Capital Treatment Event" means the receipt by the Company and the
Trust of an opinion of counsel experienced in such matters to the effect that
reasonable determination by the Company that, as a result of the occurrence of
any amendment to, or change (including any announced prospective change) in, the
laws of the United States or any political subdivision thereof or therein, or as
the result of any official or administrative pronouncement or action or decision
interpreting or applying such laws, rules or regulations, which amendment or
change is effective or which pronouncement, action or decision is announced on
or after the date of issuance of the Debt Securities, there is more than an
insubstantial risk that the Company will not

                                       2
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be entitled to treat an amount equal to the aggregate Liquidation Amount of the
Debt Securities as "Tier I Capital" (or the then equivalent thereof) for
purposes of the capital adequacy guidelines of the Federal Reserve, as then in
effect and applicable to the Company provided, however, that the distribution of
                                     --------  -------
the Debt Securities in connection with the liquidation of the Trust by the
Company shall not in and of itself constitute a Capital Treatment Event by the
Company shall not in and of itself constitute a Capital Treatment Event unless
such liquidation shall have occurred in connection with a Tax Event or an
Investment Company Event.

          "Certificate" means a certificate signed by any one of the principal
executive officer, the principal financial officer or the principal accounting
officer of the Company.

          "Common Securities" means undivided beneficial interests in the assets
of GBB Capital III which rank pari passu with Capital Securities issued by GBB
Capital III; provided, however, that upon the occurrence of an Event of Default
             --------  -------
(as defined in the Declaration), the rights of holders of such Common Securities
to payment in respect of distributions and payments upon liquidation, redemption
and otherwise are subordinated to the rights of holders of such Capital
Securities.

          "Company" means Greater Bay Bancorp, a bank holding company
incorporated in California, and, subject to the provisions of Article XI, shall
include its successors and assigns.

          "Comparable Treasury Issue" means with respect to any Special
Redemption Date, the United States Treasury security selected by the Quotation
Agent as having a maturity comparable to the Remaining Life that would be
utilized, at the time of selection and in accordance with customary financial
practice, in pricing new issues of corporate debt securities of comparable
maturity to the Remaining Life.  If no United States Treasury security has a
maturity which is within a period from three months before to three months after
March 8, 2010, the two most closely corresponding United States Treasury
securities shall be used as the Comparable Treasury Issue, and the Treasury Rate
shall be interpolated or extrapolated on a straight-line basis, rounding to the
nearest month using such securities.

          "Comparable Treasury Price" means (a) the average of five Reference
Treasury Dealer Quotations for such Special Redemption Date, after excluding the
highest and lowest such Reference Treasury Dealer Quotations, or (b) if the
Trustee obtains fewer than five such Reference Treasury Dealer Quotations, the
average of all such Quotations.

          "Custodian" means any receiver, trustee, assignee, liquidator or
similar official under any Bankruptcy Law.

          "Debt Security" or "Debt Securities" has the meaning stated in the
first recital of this Indenture.

          "Debt Security Register" has the meaning specified in Section 2.05.

          "Declaration" means the Amended and Restated Declaration of Trust of
GBB Capital III, as amended or supplemented from time to time.

                                       3
<PAGE>

          "Default" means any event, act or condition that with notice or lapse
of time, or both, would constitute an Event of Default.

          "Defaulted Interest" has the meaning set forth in Section 2.08.

          "Deferred Interest" has the meaning set forth in Section 2.11.

          "Event of Default" means any event specified in Section 5.01,
continued for the period of time, if any, and after the giving of the notice, if
any, therein designated.

          "Extension Period" has the meaning set forth in Section 2.11.

          "Federal Reserve" means the Board of Governors of the Federal Reserve
System.

          "Finance Subsidiary" means a special purpose vehicle created expressly
for the purpose of financing the activities of the Company and its subsidiaries.

          "Indebtedness Ranking on a Partity with the Debt Securities" shall
mean (i) indebtedness, whether outstanding on the date of execution of this
indenture or hereafter created, assumed or incurred, to the extent such
indebtedness by its terms ransk pari passu with and not prior or senior to the
Debt Securities in the right of payment upon the happening of the dissolution,
winding up, liquidation or reorganization of the Company including, without
limitation the Company's 9.75% Junior Subordinated Deferrable Interest
Debentures, maturing on March 31, 2027 ("1997 Junior Subordinated Debentures")
and the Company's Floating Rate Junior Subordinate Deferrable Interest
Debentures, maturing on September 15, 2028 (the "1998 Junior Subordinated
Debentures") and (ii) all other debt securities, and guarantees in respect of
those debt securities, issued to any trust other than the Trust, or a trustee of
such trust, partnership or other entity affiliated with the company, that is a
Finance Subsidiary in connection with the issuance by such Finance Subsidiary of
equity securities or other securities guaranteed by the Company pursuant to an
instrument that ranks pari passu with or junior in right of payment to the
Capital Securities Guarantee, including, without limitation, the Company's
guarantee issued pursuant to the 1997 Junior Subordinated Debentures and the
Company's guarantee issued pursuant to the 1998 Junior Subordinated Debentures.
The securing of any indebtedness otherwise constituting indebtedness Ranking on
Parity with the Debt Securities shall not be deemed to prevent such indebtedness
from constituting Indebtedness Ranking on a Parity with the Debt Securities with
respect to any assets of the Company not securing such indebtedness.

          "Indebtedness Ranking Junior to the Debt Securities" shall mean any
indebtedness, whether outstanding on the date of execution of this Indenture or
hereafter created, assumed or incurred, to the extent such indebtedness by its
terms ranks junior to and not pari passu with or prior to the Debt Securities in
right of payment upon the happening of the dissolution or winding-up or
liquidation or reorganization of the Company.  The securing of any indebtedness
otherwise constituting Indebtedness Ranking Junior to the Debt Securities shall
not be deemed to prevent such Indebtedness from constituting Indebtedness
Ranking Junior to the Debt Securities with respect to any assets of the Company
not securing such indebtedness.

                                       4
<PAGE>

          "Indenture" means this instrument as originally executed or, if
amended or supplemented as herein provided, as so amended or supplemented, or
both.

          "Institutional Trustee"  has the meaning set forth in the Declaration.

          "Interest Payment Date" means each March 8 and September 8 during the
term of this Indenture.

          "Interest Rate" means 10 7/8%.

          "Investment Company Event" means the receipt by GBB Capital III of an
opinion of counsel experienced in such matters to the effect that, as a result
of the occurrence of a change in law or regulation or written change (including
any announced prospective change) in interpretation or application of law or
regulation by any legislative body, court, governmental agency or regulatory
authority, there is more than an insubstantial risk that GBB Capital III is or
will be considered an "investment company" that is required to be registered
under the Investment Company Act of 1940, as amended, which change or
prospective change becomes effective or would become effective, as the case may
be, on or after the date of the issuance of the Debt Securities.

          "Liquidation Amount" means the stated amount of $1,000 per Trust
Security.

          "Maturity Date" means March 8, 2030.

          "Officers' Certificate" means a certificate signed by the Chairman of
the Board, the Vice Chairman, the President, any Managing Director or any Vice
President, and by the Chief Financial Officer, the Treasurer, an Assistant
Treasurer, the Comptroller, an Assistant Comptroller, the Secretary or an
Assistant Secretary of the Company, and delivered to the Trustee.  Each such
certificate shall include the statements provided for in Section 14.06 if and to
the extent required by the provisions of such Section.

          "Opinion of Counsel" means an opinion in writing signed by legal
counsel, who may be an employee of or counsel to the Company, or may be other
counsel satisfactory to the Trustee.  Each such opinion shall include the
statements provided for in Section 14.06 if and to the extent required by the
provisions of such Section.

          "Other Debentures" shall mean all junior subordinated debentures other
than the Debt Securities issued by the Company from time to time and sold to
trusts other than the Trust to be established by the Company (if any), in each
case similar to the Trust.

          "Other Guarantees" shall mean all guarantees other than the Capital
Securities Guarantee issued by the Company with respect to preferred beneficial
interests (if any) issued to trusts other than the Trust to be established by
the Company (if any), in each case similar to the Trust.

          The term "outstanding,"  when used with reference to Debt Securities,
subject to the provisions of Section 7.04, means, as of any particular time, all
Debt Securities authenticated and delivered by the Trustee or the Authenticating
Agent under this Indenture, except

                                       5
<PAGE>

          (a) Debt Securities theretofore canceled by the Trustee or the
     Authenticating Agent or delivered to the Trustee for cancellation;

          (b) Debt Securities, or portions thereof, for the payment or
     redemption of which moneys in the necessary amount shall have been
     deposited in trust with the Trustee or with any paying agent (other than
     the Company) or shall have been set aside and segregated in trust by the
     Company (if the Company shall act as its own paying agent); provided that,
     if such Debt Securities, or portions thereof, are to be redeemed prior to
     maturity thereof, notice of such redemption shall have been given as
     provided in Article Fourteen or provision satisfactory to the Trustee shall
     have been made for giving such notice; and

          (c) Debt Securities paid pursuant to Section 2.06 or in lieu of or in
     substitution for which other Debt Securities shall have been authenticated
     and delivered pursuant to the terms of Section 2.06 unless proof
     satisfactory to the Company and the Trustee is presented that any such Debt
     Securities are held by bona fide holders in due course.

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

          "Predecessor Security" of any particular Debt Security means every
previous Debt Security evidencing all or a portion of the same debt as that
evidenced by such particular Debt Security; and, for the purposes of this
definition, any Debt Security authenticated and delivered under Section 2.06 in
lieu of a lost, destroyed or stolen Debt Security shall be deemed to evidence
the same debt as the lost, destroyed or stolen Debt Security.

          "Primary Treasury Dealer" means a primary United States Government
securities dealer in New York City.

          "Principal Office of the Trustee," or other similar term, means the
office of the Trustee, at which at any particular time its corporate trust
business shall be principally administered, which at the time of the execution
of this Indenture shall be 101 Barclay Street, Floor 21 West, New York, NY
10286.

          "Quotation Agent" means Salomon Smith Barney, Inc. and its successors;
provided, however, that if the foregoing shall cease to be a Primary Treasury
--------  -------
Dealer, the Company shall substitute therefor another Primary Treasury Dealer.

          "Redemption Date" has the meaning set forth in Section 10.01.

          "Redemption Price" means the price set forth in the following table
for any Redemption Date or Special Redemption Date that occurs within the
twelve-month period beginning in the relevant year indicated below, expressed in
percentage of the principal amount of the Debt Securities being redeemed:

                                       6
<PAGE>

                   Year Beginning                  Percentage
                   --------------                  ----------

                    March 8, 2010                   105.438

                    March 8, 2011                   104.894

                    March 8, 2012                   104.350

                    March 8, 2013                   103.806

                    March 8, 2014                   103.263

                    March 8, 2015                   102.719

                    March 8, 2016                   102.175

                    March 8, 2017                   101.631

                    March 8, 2018                   101.088

                    March 8, 2019                   100.544

               March 8, 2020 and after              100.000

          plus accrued and unpaid interest on such Debentures to the Redemption
Date, in the case of a redemption due to the occurrence of a Special Event, to
the Special Redemption Date.

          "Reference Treasury Dealer" means (i) the Quotation Agent and (ii) any
other Primary Treasury Dealer selected by the Trustee after consultation with
the Company.

          "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the average, as determined by
the Quotation Agent, of the bid and asked prices for the Comparable Treasury
Issue (expressed in each case as a percentage of its principal amount) quoted in
writing to the Trustee by such Reference Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such Redemption Date.

          "Remaining Life" means, with respect to any Debt Security, the period
from the Special Redemption Date for such Debt Security to March 8, 2010.

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

          "Securityholder," "holder of Debt Securities" or other similar terms,
means any Person in whose name at the time a particular Debt Security is
registered on the register kept by the Company or the Trustee for that purpose
in accordance with the terms hereof.

                                       7
<PAGE>

          "Senior Indebtedness" means, with respect to the Company, (i) the
principal, premium, if any, and interest in respect of (A) indebtedness of the
Company for money borrowed and (B) indebtedness evidenced by securities,
debentures, notes, bonds or other similar instruments issued by the Company;
(ii) all capital lease obligations of the Company; (iii) all obligations of the
Company issued or assumed as the deferred purchase price of property, all
conditional sale obligations of the Company and all obligations of the Company
under any title retention agreement (but excluding trade accounts payable
arising in the ordinary course of business); (iv) all obligations of the Company
for the reimbursement of any letter of credit, any banker's acceptance, any
security purchase facility, any repurchase agreement or similar arrangement, any
interest rate swap, any other hedging arrangement, any obligation under options
or any similar credit or other transaction; (v) all obligations of the type
referred to in clauses (i) through (iv) above of other Persons for the payment
of which the Company is responsible or liable as obligor, guarantor or
otherwise; and (vi) all obligations of the type referred to in clauses (i)
through (v) above of other Persons secured by any lien on any property or asset
of the Company (whether or not such obligation is assumed by the Company),
whether incurred on or prior to the date of this Indenture or thereafter
incurred, unless, in the instrument creating or evidencing the same or pursuant
to which the same is outstanding, it is provided that such obligations are not
superior or pari passu in right of payment to the Debt Securities, except for
Indebtedness Ranking Junior to the Debt Securities and Indebtedness Ranking
Junior to the Debt Securities.  Senior Indebtedness shall continue to be Senior
Indebtedness and be entitled to the subordination provisions irrespective of any
amendment, modification or waiver of any term of such Senior Indebtedness.

          "Special Event" means any of a Tax Event, an Investment Company Event
or a Capital Treatment Event.

          "Special Redemption Date" has the meaning set forth in 10.02.

          "Special Redemption Price" means (1) if the Special Redemption Date is
before March 8, 2010, the greater of (a) 100% of the principal amount of the
Debt Securities being redeemed pursuant to Section 10.02 and (b) as determined
by a Quotation Agent, the sum of the present values of scheduled payments of
principal and interest over the Remaining Life of such Debt Securities,
discounted to the Special Redemption Date on a semi-annual basis (assuming a
360-day year consisting of twelve 30-day months) at the Treasury Rate plus
0.45%, plus, in the case of either (a) or (b), accrued and unpaid interest on
such Debt Securities to Special Redemption Date and (2) if the Special
Redemption Date is on or after March 8, 2010, the Redemption Price for such
Special Redemption Date.

          "Subsidiary" means, with respect to any Person, (i) any corporation at
least a majority of the outstanding voting stock of which is owned, directly or
indirectly, by such Person or by one or more of its Subsidiaries, or by such
Person and one or more of its Subsidiaries, (ii) any general partnership, joint
venture or similar entity, at least a majority of the outstanding partnership or
similar interests of which shall at the time be owned by such Person, or by one
or more of its Subsidiaries, or by such Person and one or more of its
Subsidiaries, and (iii) any limited partnership of which such Person or any of
its Subsidiaries is a general partner.  For the purposes of this definition,
"voting stock" means shares, interests, participations or other equivalents in
the equity interest (however designated) in such Person having ordinary voting

                                       8
<PAGE>

power for the election of a majority of the directors (or the equivalent) of
such Person, other than shares, interests, participations or other equivalents
having such power only by reason of the occurrence of a contingency.

          "Tax Event" means the receipt by the Company and GBB Capital III of an
opinion of counsel experienced in such matters to the effect that, as a result
of any amendment to or change (including any announced prospective change) in
the laws or any regulations thereunder of the United States or any political
subdivision or taxing authority thereof or therein, or as a result of any
official administrative pronouncement (including any private letter ruling,
technical advice memorandum, field service advice, regulatory procedure, notice
or announcement, including any notice or announcement of intent to adopt such
procedures or regulations (an "Administrative Action")) or judicial decision
interpreting or applying such laws or regulations, regardless of whether such
Administrative Action or judicial decision is issued to or in connection with a
proceeding involving the Company or GBB Capital III and whether or not subject
to review or appeal, which amendment, clarification, change, Administrative
Action or decision is enacted, promulgated or announced, in each case on or
after the date of issuance of the Debt Securities, there is more than an
insubstantial risk that: (i) GBB Capital III is, or will be within 90 days of
the date of such opinion, subject to United States federal income tax with
respect to income received or accrued on the Debt Securities; (ii) interest
payable by the Company on the Debt Securities is not, or within 90 days of the
date of such opinion, will not be, deductible by the Company, in whole or in
part, for United States federal income tax purposes; or (iii) GBB Capital III
is, or will be within 90 days of the date of such opinion, subject to more than
a de minimis amount of other taxes, duties or other governmental charges.

          "Treasury Rate" means (i) the yield, under the heading which
represents the average for the week immediately prior to the date of
calculation, appearing in the most recently published statistical release
designated H.15 (519) or any successor publication which is published weekly by
the Federal Reserve and which establishes yields on actively traded United
States Treasury securities adjusted to constant maturity under the caption
"Treasury Constant Maturities," for the maturity corresponding to the Remaining
Life (if no maturity is within three months before or after the Remaining Life,
yields for the two published maturities most closely corresponding to the
Remaining Life shall be determined and the Treasury Rate shall be interpolated
or extrapolated from such yields on a straight-line basis, rounding to the
nearest month) or (ii) if such release (or any successor release) is not
published during the week preceding the calculation date or does not contain
such yields, the rate per annum equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, calculated using a price for the
Comparable Treasury Issue (expressed as a percentage of its principal amount)
equal to the Comparable Treasury Price for such Special Redemption Date.  The
Treasury Rate shall be calculated on the third Business Day preceding the
Special Redemption Date.

          "Trust" means GBB Capital III, the Delaware business trust, or any
other similar trust created for the purpose of issuing Capital Securities in
connection with the issuance of Debt Securities under this Indenture, of which
the Company is the sponsor.

          "Trust Indenture Act" means the Trust Indenture Act of 1939, as
amended.

                                       9
<PAGE>

          "Trust Securities" means Common Securities and Capital Securities of
GBB Capital III.

          "Trustee" means the Person identified as "Trustee" in the first
paragraph hereof, and, subject to the provisions of Article VI hereof, shall
also include its successors and assigns as Trustee hereunder.

                                  ARTICLE II
                                DEBT SECURITIES

          SECTION 2.01.  Authentication and Dating.
          ----------------------------------------

          Upon the execution and delivery of this Indenture, or from time to
time thereafter, Debt Securities in an aggregate principal amount not in excess
of $10,310,000 may be executed and delivered by the Company to the Trustee for
authentication, and the Trustee shall thereupon authenticate and make available
for delivery said Debt Securities to or upon the written order of the Company,
signed by its Chairman of the Board of Directors, Vice Chairman, President or
Chief Financial Officer, one of its Managing Directors or one of its Vice
Presidents and by its Secretary, any Assistant Secretary, Treasurer or any
Assistant Treasurer, without any further action by the Company hereunder.  In
authenticating such Debt Securities, and accepting the additional
responsibilities under this Indenture in relation to such Debt Securities, the
Trustee shall be entitled to receive, and (subject to Section 6.01) shall be
fully protected in relying upon:

               (a)  a copy of any Board Resolution or Board Resolutions relating
     thereto and, if applicable, an appropriate record of any action taken
     pursuant to such resolution, in each case certified by the Secretary or an
     Assistant Secretary of the Company as the case may be; and

               (b)  an Opinion of Counsel prepared in accordance with Section
     14.06 which shall also state:

                    (1)  that such Debt Securities, when authenticated and
               delivered by the Trustee and issued by the Company in each case
               in the manner and subject to any conditions specified in such
               Opinion of Counsel, will constitute valid and legally binding
               obligations of the Company; and

                    (2)  that all laws and requirements in respect of the
               execution and delivery by the Company of the Debt Securities,
               have been complied with and that authentication and delivery of
               the Debt Securities by the Trustee will not violate the terms of
               this Indenture.

          The Trustee shall have the right to decline to authenticate and
deliver any Debt Securities under this Section if the Trustee, being advised by
counsel, determines that such action may not lawfully be taken or if a
Responsible Officer of the Trustee in good faith shall determine that such
action would expose the Trustee to personal liability to existing holders.

                                       10
<PAGE>

          The definitive Debt Securities shall be typed, printed, lithographed
or engraved on steel engraved borders or may be produced in any other manner,
all as determined by the officers executing such Debt Securities, as evidenced
by their execution of such Debt Securities.

          SECTION 2.02.  Form of Trustee's Certificate of Authentication.
          --------------------------------------------------------------

          The Trustee's certificate of authentication on all Debt Securities
shall be in substantially the following form:

          This is one of the Debt Securities referred to in the within-mentioned
Indenture.

          THE BANK OF NEW YORK, AS TRUSTEE

          By:_________________________

             Authorized Officer

          Dated: ______________________

          SECTION 2.03.  Form and Denomination of Debt Securities.
          -------------------------------------------------------

          The Debt Securities shall be in registered, certificated form without
coupons and in minimum denominations of $1,000 and any multiple of $1,000 in
excess thereof.  The Debt Securities shall be numbered, lettered, or otherwise
distinguished in such manner or in accordance with such plans as the officers
executing the same may determine with the approval of the Trustee as evidenced
by the execution and authentication thereof.

          SECTION 2.04.  Execution of Debt Securities.
          -------------------------------------------

          The Debt Securities shall be signed in the name and on behalf of the
Company by the manual or facsimile signature of its Chairman of the Board of
Directors, Vice Chairman, President or Chief Financial Officer, one of its
Managing Directors or one of its Executive Vice Presidents, Senior Vice
Presidents or Vice Presidents and by the manual or facsimile signature of its
Secretary, one of its Assistant Secretaries, its Treasurer or one of its
Assistant Treasurers, under its corporate seal which may be affixed thereto or
printed, engraved or otherwise reproduced thereon, by facsimile or otherwise,
and which need not be attested.  Only such Debt Securities as shall bear thereon
a certificate of authentication substantially in the form herein before recited,
executed by the Trustee or the Authenticating Agent by the manual signature of
an authorized officer, shall be entitled to the benefits of this Indenture or be
valid or obligatory for any purpose.  Such certificate by the Trustee or the
Authenticating Agent upon any Debt Security executed by the Company shall be
conclusive evidence that the Debt Security so authenticated has been duly
authenticated and delivered hereunder and that the holder is entitled to the
benefits of this Indenture.

          In case any officer of the Company who shall have signed any of the
Debt Securities shall cease to be such officer before the Debt Securities so
signed shall have been authenticated and delivered by the Trustee or the
Authenticating Agent, or disposed of by the Company, such Debt Securities
nevertheless may be authenticated and delivered or disposed of as though the
Person who signed such Debt Securities had not ceased to be such officer of the

                                       11
<PAGE>

Company; and any Debt Security may be signed on behalf of the Company by such
Persons as, at the actual date of the execution of such Debt Security, shall be
the proper officers of the Company, although at the date of the execution of
this Indenture any such person was not such an officer.

          Every Debt Security shall be dated the date of its authentication.

          SECTION 2.05.  Exchange and Registration of Transfer of Debt
          ------------------------------------------------------------
Securities.
-----------

          The Company shall cause to be kept, at the office or agency maintained
for the purpose of registration of transfer and for exchange as provided in
Section 3.02, a register (the "Debt Security Register") for the Debt Securities
issued hereunder in which, subject to such reasonable regulations as it may
prescribe, the Company shall provide for the registration and transfer of all
Debt Securities as in this Article Two provided.  Such register shall be in
written form or in any other form capable of being converted into written form
within a reasonable time.

          Debt Securities to be exchanged may be surrendered at the principal
corporate trust office of the Trustee or at any office or agency to be
maintained by the Company for such purpose as provided in Section 3.02, and the
Company shall execute, the Company or the Trustee shall register and the Trustee
or the Authenticating Agent shall authenticate and make available for delivery
in exchange therefor the Debt Security or Debt Securities which the
Securityholder making the exchange shall be entitled to receive.  Upon due
presentment for registration of transfer of any Debt Security at the principal
corporate trust office of the Trustee or at any office or agency of the Company
maintained for such purpose as provided in Section 3.02, the Company shall
execute, the Company or the Trustee shall register and the Trustee or the
Authenticating Agent shall authenticate and make available for delivery in the
name of the transferee or transferees a new Debt Security for a like aggregate
principal amount. Registration or registration of transfer of any Debt Security
by the Trustee or by any agent of the Company appointed pursuant to Section
3.02, and delivery of such Debt Security, shall be deemed to complete the
registration or registration of transfer of such Debt Security.

          All Debt Securities presented for registration of transfer or for
exchange or payment shall (if so required by the Company or the Trustee or the
Authenticating Agent) be duly endorsed by, or be accompanied by a written
instrument or instruments of transfer in form satisfactory to the Company and
the Trustee or the Authenticating Agent duly executed by, the holder or his
attorney duly authorized in writing.

          No service charge shall be made for any exchange or registration of
transfer of Debt Securities, but the Company or the Trustee may require payment
of a sum sufficient to cover any tax, fee or other governmental charge that may
be imposed in connection therewith.

          The Company or the Trustee shall not be required to exchange or
register a transfer of any Debt Security for a period of 15 days next preceding
the date of selection of Debt Securities for redemption.

                                       12
<PAGE>

          Notwithstanding the foregoing, Debt Securities may not be transferred
except in compliance with the restricted securities legend set forth below (the
"Restrictive Securities Legend"), unless otherwise determined by the Company in
accordance with applicable law:

          THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS.  NEITHER
THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD,
ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED OR OTHERWISE DISPOSED OF IN THE
ABSENCE OF SUCH REGISTRATION OR UNLESS SUCH TRANSACTION IS EXEMPT FROM, OR NOT
SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.  THE HOLDER OF
THIS SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO OFFER, SELL OR OTHERWISE
TRANSFER SUCH SECURITY ONLY (A) TO THE COMPANY, (B) PURSUANT TO RULE 144A UNDER
THE SECURITIES ACT ("RULE 144A"), TO A PERSON IT REASONABLY BELIEVES IS A
"QUALIFIED INSTITUTIONAL BUYER" AS DEFINED IN RULE 144A THAT PURCHASES FOR ITS
OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE
IS GIVEN THAT THE TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A, (C) TO AN
"ACCREDITED INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH (a) (1), (2), (3) OR
(7) OF RULE 501 UNDER THE SECURITIES ACT THAT IS ACQUIRING THE SECURITY FOR ITS
OWN ACCOUNT, OR FOR THE ACCOUNT OF AN "ACCREDITED INVESTOR," FOR INVESTMENT
PURPOSES AND NOT WITH A VIEW TO, OR FOR OFFER OR SALE IN CONNECTION WITH, ANY
DISTRIBUTION IN VIOLATION OF THE SECURITIES ACT, OR (D) PURSUANT TO ANOTHER
AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT,
SUBJECT TO THE COMPANY'S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER
PURSUANT TO CLAUSES (C) OR (D) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL,
CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO IT IN ACCORDANCE WITH THE
INDENTURE, A COPY OF WHICH MAY BE OBTAINED FROM THE COMPANY.  THE HOLDER OF THIS
SECURITY AGREES THAT IT WILL COMPLY WITH THE FOREGOING RESTRICTIONS.

          SECTION 2.06.  Mutilated, Destroyed, Lost or Stolen Debt Securities
          -------------------------------------------------------------------

          In case any Debt Security shall become mutilated or be destroyed, lost
or stolen, the Company shall execute, and upon its written request the Trustee
shall authenticate and deliver, a new Debt Security bearing a number not
contemporaneously outstanding, in exchange and substitution for the mutilated
Debt Security, or in lieu of and in substitution for the Debt Security so
destroyed, lost or stolen.  In every case the applicant for a substituted Debt
Security shall furnish to the Company and the Trustee such security or indemnity
as may be required by them to save each of them harmless, and, in every case of
destruction, loss or theft, the applicant shall also furnish to the Company and
the Trustee evidence to their satisfaction of the destruction, loss or theft of
such Debt Security and of the ownership thereof.

          The Trustee may authenticate any such substituted Debt Security and
deliver the same upon the written request or authorization of any officer of the
Company.  Upon the issuance of any substituted Debt Security, the Company may
require the payment of a sum

                                       13
<PAGE>

sufficient to cover any tax or other governmental charge that may be imposed in
relation thereto and any other expenses connected therewith. In case any Debt
Security which has matured or is about to mature or has been called for
redemption in full shall become mutilated or be destroyed, lost or stolen, the
Company may, instead of issuing a substitute Debt Security, pay or authorize the
payment of the same (without surrender thereof except in the case of a mutilated
Debt Security) if the applicant for such payment shall furnish to the Company
and the Trustee such security or indemnity as may be required by them to save
each of them harmless and, in case of destruction, loss or theft, evidence
satisfactory to the Company and to the Trustee of the destruction, loss or theft
of such Security and of the ownership thereof.

          Every substituted Debt Security issued pursuant to the provisions of
this Section 2.06 by virtue of the fact that any such Debt Security is
destroyed, lost or stolen shall constitute an additional contractual obligation
of the Company, whether or not the destroyed, lost or stolen Debt Security shall
be found at any time, and shall be entitled to all the benefits of this
Indenture equally and proportionately with any and all other Debt Securities
duly issued hereunder.  All Debt Securities shall be held and owned upon the
express condition that, to the extent permitted by applicable law, the foregoing
provisions are exclusive with respect to the replacement or payment of
mutilated, destroyed, lost or stolen Debt Securities and shall preclude any and
all other rights or remedies notwithstanding any law or statute existing or
hereafter enacted to the contrary with respect to the replacement or payment of
negotiable instruments or other securities without their surrender.

          SECTION 2.07.  Temporary Debt Securities.
          ----------------------------------------

          Pending the preparation of definitive Debt Securities, the Company may
execute and the Trustee shall authenticate and make available for delivery
temporary Debt Securities that are typed, printed or lithographed. Temporary
Debt Securities shall be issuable in any authorized denomination, and
substantially in the form of the definitive Debt Securities but with such
omissions, insertions and variations as may be appropriate for temporary Debt
Securities, all as may be determined by the Company.  Every such temporary Debt
Security shall be executed by the Company and be authenticated by the Trustee
upon the same conditions and in substantially the same manner, and with the same
effect, as the definitive Debt Securities.  Without unreasonable delay the
Company will execute and deliver to the Trustee or the Authenticating Agent
definitive Debt Securities and thereupon any or all temporary Debt Securities
may be surrendered in exchange therefor, at the principal corporate trust office
of the Trustee or at any office or agency maintained by the Company for such
purpose as provided in Section 3.02, and the Trustee or the Authenticating Agent
shall authenticate and make available for delivery in exchange for such
temporary Debt Securities a like aggregate principal amount of such definitive
Debt Securities.  Such exchange shall be made by the Company at its own expense
and without any charge therefor except that in case of any such exchange
involving a registration of transfer the Company may require payment of a sum
sufficient to cover any tax, fee or other governmental charge that may be
imposed in relation thereto.  Until so exchanged, the temporary Debt Securities
shall in all respects be entitled to the same benefits under this Indenture as
definitive Debt Securities authenticated and delivered hereunder.

                                       14
<PAGE>

          SECTION 2.08.  Payment of Interest.
          ----------------------------------

          Each Debt Security will bear interest at the Interest Rate from and
including the original date of issuance of such Debt Security until the Maturity
Date, and on any overdue principal and (to the extent that payment of such
interest is enforceable under applicable law) Deferred Interest on any overdue
installment of interest (including Defaulted Interest), payable (subject to the
provisions of Article XII) on each Interest Payment Date commencing on September
8, 2000.  Interest and any Deferred Interest on any Debt Security that is
payable, and is punctually paid or duly provided for, on any Interest Payment
Date for Debt Securities shall be paid to the Person in whose name said Debt
Security (or one or more Predecessor Securities) is registered at the close of
business on the regular record date for such interest installment except that
interest and any Deferred Interest payable on the Maturity Date shall be paid to
the Person to whom principal is paid.  In the event that any Debt Security or
portion thereof is called for redemption and the redemption date is subsequent
to a regular record date with respect to any Interest Payment Date and prior to
such Interest Payment Date, interest on such Debt Security will be paid upon
presentation and surrender of such Debt Security.

          Any interest on any Debt Security, other than Deferred Interest, that
is payable, but is not punctually paid or duly provided for, on any Interest
Payment Date (herein called "Defaulted Interest") shall forthwith cease to be
payable to the registered holder on the relevant regular record date by virtue
of having been such holder; and such Defaulted Interest shall be paid by the
Company to the Persons in whose names such Debt Securities (or their respective
Predecessor Securities) are registered at the close of business on a special
record date for the payment of such Defaulted Interest, which  shall be fixed in
the following manner:  the Company shall notify the Trustee in writing of the
amount of Defaulted Interest proposed to be paid on each such Debt Security and
the date of the proposed payment, and at the same time the Company shall deposit
with the Trustee an amount of money equal to the aggregate amount proposed to be
paid in respect of such Defaulted Interest or shall make arrangements
satisfactory to the Trustee for such deposit prior to the date of the proposed
payment, such money when deposited to be held in trust for the benefit of the
Persons entitled to such Defaulted Interest as in this clause provided.
Thereupon the Trustee shall fix a special record date for the payment of such
Defaulted Interest which shall not be more than fifteen nor less than ten days
prior to the date of the proposed payment and not less than ten days after the
receipt by the Trustee of the notice of the proposed payment.  The Trustee shall
promptly notify the Company of such special record date and, in the name and at
the expense of the Company, shall cause notice of the proposed payment of such
Defaulted Interest and the special record date therefor to be mailed, first
class postage prepaid, to each Securityholder at his or her address as it
appears in the Debt Security Register, not less than ten days prior to such
special record date.  Notice of the proposed payment of such Defaulted Interest
and the special record date therefor having been mailed as aforesaid, such
Defaulted Interest shall be paid to the Persons in whose names such Debt
Securities (or their respective Predecessor Securities) are registered on  such
special record date and shall be no longer payable.

          Any interest scheduled to become payable on an Interest Payment Date
occurring during an Extension Period shall not be Defaulted Interest and shall
be payable on such other date as may be specified in the terms of such Debt
Securities.

                                       15
<PAGE>

          The term "regular record date" as used in this Section shall mean
either the fifteenth day of the month immediately preceding the month in which
an Interest Payment Date shall occur, if such Interest Payment Date is the first
day of a month, or the last day of the month immediately preceding the month in
which an Interest Payment shall occur, if such Interest Payment Date is the
fifteenth day of a month, whether or not such date is a Business Day.

          Subject to the foregoing provisions of this Section, each Debt
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Debt Security shall carry the rights to
interest accrued and unpaid, and to accrue, that were carried by such other Debt
Security.

          SECTION 2.09.  Cancellation of Debt Securities Paid, etc.
          ---------------------------------------------------------

          All Debt Securities surrendered for the purpose of payment,
redemption, exchange or registration of transfer, shall, if surrendered to the
Company or any paying agent, be surrendered to the Trustee and promptly canceled
by it, or, if surrendered to the Trustee or any Authenticating Agent, shall be
promptly canceled by it, and no Debt Securities shall be issued in lieu thereof
except as expressly permitted by any of the provisions of this Indenture.  All
Debt Securities canceled by any Authenticating Agent shall be delivered to the
Trustee.  The Trustee shall destroy all canceled Debt Securities unless the
Company otherwise directs the Trustee in writing.  If the Company shall acquire
any of the Debt Securities, however, such acquisition shall not operate as a
redemption or satisfaction of the indebtedness represented by such Debt
Securities unless and until the same are surrendered to the Trustee for
cancellation.

          SECTION 2.10.  Computation of Interest.
          --------------------------------------

          The amount of interest payable for any period will be computed on the
basis of a 360-day year of twelve 30-day months.

          SECTION 2.11.  Extension of Interest Payment Period.
          ---------------------------------------------------

          So long as no Event of Default has occurred and is continuing, the
Company shall have the right, from time to time and without causing an Event of
Default, to defer payments of interest on the Debt Securities by extending the
interest payment period on the Debt Securities at any time and from time to time
during the term of the Debt Securities, for up to ten consecutive semi-annual
periods (each such extended interest payment period, an "Extension Period"),
during which Extension Period no interest shall be due and payable.  No
Extension Period may end on a date other than an Interest Payment Date.  During
any Extension Period, interest will continue to accrue on the Debt Securities
and interest on such accrued interest (such accrued interest and interest
thereon referred to herein as "Deferred Interest") will accrue at the Interest
Rate, compounded semi-annually from the date such Deferred Interest would have
been payable were it not for the Extension Period, both to the extent permitted
by law.  No interest or Deferred Interest shall be due and payable during an
Extension Period, except at the end thereof, but each installment of interest
that would otherwise have been due and payable during such Extension Period
shall bear Deferred Interest.  At the end of any such Extension Period the
Company shall pay all Deferred Interest then accrued and unpaid on the Debt
Securities; provided, however, that no Extension Period may extend beyond the
            -------- --------
Maturity Date; and provided further, however, that
                   -------- -------  -------

                                       16
<PAGE>

during any such Extension Period, the Company may not (i) declare or pay any
dividends or distributions on, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of the Company's capital stock or (ii)
make any payment of principal of or interest or premium, if any, on or repay,
repurchase or redeem any debt securities of the Company (including Other
Debentures) that rank pari passu in all respects with or junior in interest to
the Debt Securities or (iii) make any guarantee payments with respect to any
guarantee by the Company of the debt securities of any subsidiary of the Company
(including Other Guarantees) if such guarantee ranks pari passu with or junior
in right of payment to the Debt Securities (other than (a) repurchases,
redemptions or other acquisitions of shares of capital stock of the Company in
connection with any employment contract, benefit plan or other similar
arrangement with or for the benefit of one or more employees, officers,
directors or consultants, in connection with a dividend reinvestment or
stockholder stock purchase plan or in connection with the issuance of capital
stock of the Company (or securities convertible into or exercisable for such
capital stock) as consideration in an acquisition transaction entered into prior
to the applicable Extension Period, (b) as a result of any exchange or
conversion of any class or series of the Company's capital stock (or any capital
stock of a subsidiary of the Company) for any class or series of the Company's
capital stock or of any class or series of the Company's indebtedness for any
class or series of the Company's capital stock, (c) the purchase of fractional
interests in shares of the Company's capital stock pursuant to the conversion or
exchange provisions of such capital stock or the security being converted or
exchanged, (d) any declaration of a dividend in connection with any
stockholder's rights plan, or the issuance of rights, stock or other property
under any stockholder's rights plan, or the redemption or repurchase of rights
pursuant thereto, or (e) any dividend in the form of stock, warrants, options or
other rights where the dividend stock or the stock issuable upon exercise of
such warrants, options or other rights is the same stock as that on which the
dividend is being paid or ranks pari passu with or junior to such stock). Prior
to the termination of any Extension Period, the Company may further extend such
period, provided that such period together with all such previous and further
consecutive extensions thereof shall not exceed ten consecutive semi-annual
periods, or extend beyond the Maturity Date. Upon the termination of any
Extension Period and upon the payment of all Deferred Interest, the Company may
commence a new Extension Period, subject to the foregoing requirements. The
Company must give the Trustee notice of its election to begin such Extension
Period at least one Business Day prior to the earlier of (i) the date interest
on the Debt Securities would have been payable except for the election to begin
such Extension Period or (ii) the date such interest is payable, but in any
event not less than one Business Day prior to such record date. The Trustee
shall give notice of the Company's election to begin a new Extension Period to
the Securityholders.

          SECTION 2.12.  CUSIP Numbers.
          ----------------------------

          The Company in issuing the Debt Securities may use "CUSIP" numbers (if
then generally in use), and, if so, the Trustee shall use "CUSIP" numbers in
notices of redemption as a convenience to Securityholders; provided that any
such notice may state that no representation is made as to the correctness of
such numbers either as printed on the Debt Securities or as contained in any
notice of a redemption and that reliance may be placed only on the other
identification numbers printed on the Debt Securities, and any such redemption
shall not be affected by any defect in or omission of such numbers.  The Company
will promptly notify the Trustee in writing of any change in the CUSIP numbers.

                                       17
<PAGE>

                                  ARTICLE III

                      PARTICULAR COVENANTS OF THE COMPANY

          SECTION 3.01.  Payment of Principal, Premium and Interest; Agreed
          -----------------------------------------------------------------
Treatment of the Debt Securities.
---------------------------------

          (a)  The Company covenants and agrees that it will duly and punctually
pay or cause to be paid the principal of and premium, if any, and interest on
the Debt Securities at the place, at the respective times and in the manner
provided in this Indenture and the Debt Securities.  At the option of the
Company, each installment of interest on the Debt Securities may be paid (i) by
mailing checks for such interest payable to the order of the holders of Debt
Securities entitled thereto as they appear on the registry books of the Company
or (ii) by wire transfer to any account with a banking institution located in
the United States designated by such Person to the paying agent no later than
the related record date.

          (b)  The Company will treat the Debt Securities as indebtedness, and
the amounts payable in respect of the principal amount of such Debt Securities
as interest, for all U.S. federal income tax purposes.  All payments in respect
of such Debt Securities will be made free and clear of U.S. withholding tax to
any beneficial owner thereof that has provided an Internal Revenue Service Form
W8 BEN (or any substitute or successor form) establishing its non-U.S. status
for U.S. federal income tax purposes.

          (c)  The Company has no present intention to exercise its right under
Section 2.11 to defer payments of interest on the Debt Securities by commencing
an Extension Period.

          (d)  The Company believes that the likelihood that it would exercise
its right under Section 2.11 to defer payments of interest on the Debt
Securities by commencing an Extension Period at any time during which the Debt
Securities are outstanding is remote because of the restrictions that would be
imposed on the Company's ability to declare or pay dividends or distributions
on, or to redeem, purchase or make a liquidation payment with respect to, any of
its outstanding equity and on the Company's ability to make any payments of
principal of or interest on, or repurchase or redeem, any of its debt securities
that rank pari passu in all respects with (or junior in interest to) the Debt
Securities.

          SECTION 3.02.  Offices for Notices and Payments, etc.
          ----------------------------------------------------
          So long as any of the Debt Securities remain outstanding, the Company
will maintain in Texas, an office or agency where the Debt Securities may be
presented for payment, an office or agency where the Debt Securities may be
presented for registration of transfer and for exchange as in this Indenture
provided and an office or agency where notices and demands to or upon the
Company in respect of the Debt Securities or of this Indenture may be served.
The Company will give to the Trustee written notice of the location of any such
office or agency and of any change of location thereof.  Until otherwise
designated from time to time by the Company in a notice to the Trustee, or
specified as contemplated by Section 2.05, such office or agency for all of the
above purposes shall be the office or agency of the Trustee.  In case the
Company shall fail to maintain any such office or agency in Texas, or shall fail
to give such notice of the

                                       18
<PAGE>

location or of any change in the location thereof, presentations and demands may
be made and notices may be served at the principal corporate trust office of the
Trustee.

          In addition to any such office or agency, the Company may from time to
time designate one or more offices or agencies outside Texas, where the Debt
Securities may be presented for registration of transfer and for exchange in the
manner provided in this Indenture, and the Company may from time to time rescind
such designation, as the Company may deem desirable or expedient; provided,
                                                                  --------
however, that no such designation or rescission shall in any manner relieve the
-------
Company of its obligation to maintain any such office or agency in Texas, for
the purposes above mentioned.  The Company will give to the Trustee prompt
written notice of any such designation or rescission thereof.

          SECTION 3.03.  Appointments to Fill Vacancies in Trustee's Office.
          -----------------------------------------------------------------

          The Company, whenever necessary to avoid or fill a vacancy in the
office of Trustee, will appoint, in the manner provided in Section 6.09, a
Trustee, so that there shall at all times be a Trustee hereunder.

          SECTION 3.04.  Provision as to Paying Agent.
          -------------------------------------------

          (a)  If the Company shall appoint a paying agent other than the
Trustee, it will cause such paying agent to execute and deliver to the Trustee
an instrument in which such agent shall agree with the Trustee, subject to the
provision of this Section 3.04,

               (1)  that it will hold all sums held by it as such agent for the
          payment of the principal of and premium, if any, or interest, if any,
          on the Debt Securities (whether such sums have been paid to it by the
          Company or by any other obligor on the Debt Securities) in trust for
          the benefit of the holders of the Debt Securities;

               (2)  that it will give the Trustee prompt written notice of any
          failure by the Company (or by any other obligor on the Debt
          Securities) to make any payment of the principal of and premium, if
          any, or interest, if any, on the Debt Securities when the same shall
          be due and payable; and

               (3)  that it will, at any time during the continuance of any
          Event of Default, upon the written request of the Trustee, forthwith
          pay to the Trustee all sums so held in trust by such paying agent.

          (b)  If the Company shall act as its own paying agent, it will, on or
before each due date of the principal of and premium, if any, or interest, if
any, on the Debt Securities, set aside, segregate and hold in trust for the
benefit of the holders of the Debt Securities a sum sufficient to pay such
principal, premium or interest so becoming due and will notify the Trustee in
writing of any failure to take such action and of any failure by the Company (or
by any other obligor under the Debt Securities) to make any payment of the
principal of and premium, if any, or interest, if any, on the Debt Securities
when the same shall become due and payable.

                                       19
<PAGE>

          Whenever the Company shall have one or more paying agents for the Debt
Securities, it will, on or prior to each due date of the principal of and
premium, if any, or interest, if any, on the Debt Securities, deposit with a
paying agent a sum sufficient to pay the principal, premium or interest so
becoming due, such sum to be held in trust for the benefit of the Persons
entitled thereto and (unless such paying agent is the Trustee) the Company shall
promptly notify the Trustee in writing of its action or failure to act.

          (c)  Anything in this Section 3.04 to the contrary notwithstanding,
the Company may, at any time, for the purpose of obtaining a satisfaction and
discharge with respect to the Debt Securities, or for any other reason, pay, or
direct any paying agent to pay to the Trustee all sums held in trust by the
Company or any such paying agent, such sums to be held by the Trustee upon the
trusts herein contained.

          (d)  Anything in this Section 3.04 to the contrary notwithstanding,
the agreement to hold sums in trust as provided in this Section 3.04 is subject
to Sections 12.03 and 12.04.

          SECTION 3.05.  Certificate to Trustee.
          -------------------------------------

          The Company will deliver to the Trustee on or before 120 days after
the end of each fiscal year in each year, so long as Debt Securities are
outstanding hereunder, a Certificate stating that in the course of the
performance by the signers of their duties as officers of the Company they would
normally have knowledge of any default by the Company in the performance of any
covenants contained herein, stating whether or not they have knowledge of any
such default and, if so, specifying each such default of which the signers have
knowledge and the nature thereof.

          SECTION 3.06.  Additional Interest.
                         -------------------

          If and for so long as the Trust is the holder of all Debt Securities
and the Trust is required to pay any additional taxes, duties, assessments or
other governmental charges as a result of a Tax Event, the Company will pay such
additional amounts (the "Additional Interest") on the Debt Securities as shall
be required so that the net amounts received and retained by the Trust after
paying taxes, duties, assessments or other governmental charges will be equal to
the amounts the Trust would have received if no such taxes, duties, assessments
or other governmental charges had been imposed.  Whenever in this Indenture or
the Debt Securities there is a reference in any context to the payment of
principal of or interest on the Debt Securities, such mention shall be deemed to
include mention of payments of the Additional Interest provided for in this
paragraph to the extent that, in such context, Additional Interest is, was or
would be payable in respect thereof pursuant to the provisions of this paragraph
and express mention of the payment of Additional Interest (if applicable) in any
provisions hereof shall not be construed as excluding Additional Interest in
those provisions hereof where such express mention is not made, provided,
                                                                --------
however, that the deferral of the payment of interest during an Extension Period
-------
pursuant to Section 2.11 shall not defer the payment of any Additional Interest
that may be due and payable.

          SECTION 3.07.  Compliance with Consolidation Provisions.
                         ----------------------------------------

                                       20
<PAGE>

          The Company will not, while any of the Debt Securities remain
outstanding, consolidate with, or merge into, or merge into itself, or sell or
convey all or substantially all of its property to any other Person unless the
provisions of Article XI hereof are complied with.

          SECTION 3.08.  Limitation on Dividends.
                         -----------------------

          If Debt Securities are initially issued to the Trust  or a trustee of
such trust in connection with the issuance of Trust Securities by the Trust
(regardless of whether Debt Securities continue to be held by such trust) and
(i) there shall have occurred and be continuing any event that would constitute
an Event of Default, (ii) the Company shall be in default with respect to its
payment of any obligations under the Capital Securities Guarantee, or (iii) the
Company shall have given notice of its election to defer payments of interest on
the Debt Securities by extending the interest payment period as provided herein
and such period, or any extension thereof, shall be continuing, then the Company
may not (i) declare or pay any dividends or distributions on, or redeem,
purchase, acquire, or make a liquidation payment with respect to, any of the
Company's capital stock or (ii) make any payment of principal of or interest or
premium, if any, on or repay, repurchase or redeem any debt securities of the
Company (including Other Debentures) that rank pari passu in all respects with
or junior in interest to the Debt Securities or (iii) make any guarantee
payments with respect to any guarantee by the Company of the debt securities of
any subsidiary of the Company (including Other Guarantees) if such guarantee
ranks pari passu with or junior in right of payment to the Debt Securities
(other than (a) repurchases, redemptions or other acquisitions of shares of
capital stock of the Company in connection with any employment contract, benefit
plan or other similar arrangement with or for the benefit of one or more
employees, officers, directors or consultants, in connection with a dividend
reinvestment or stockholder stock purchase plan or in connection with the
issuance of capital stock of the Company (or securities convertible into or
exercisable for such capital stock) as consideration in an acquisition
transaction entered into prior to the occurrence of the Event of Default, (b) as
a result of any exchange or conversion of any class or series of the Company's
capital stock (or any capital stock of a subsidiary of the Company) for any
class or series of the Company's capital stock or of any class or series of the
Company's indebtedness for any class or series of the Company's capital stock,
(c) the purchase of fractional interests in shares of the Company's capital
stock pursuant to the conversion or exchange provisions of such capital stock or
the security being converted or exchanged, (d) any declaration of a dividend in
connection with any stockholder's rights plan, or the issuance of rights, stock
or other property under any stockholder's rights plan, or the redemption or
repurchase of rights pursuant thereto, or (e) any dividend in the form of stock,
warrants, options or other rights where the dividend stock or the stock issuable
upon exercise of such warrants, options or other rights is the same stock as
that on which the dividend is being paid or ranks pari passu with or junior to
such stock).

          SECTION 3.09.  Covenants as to the Trust.
                         -------------------------

          For so long as such Trust Securities remain outstanding, the Company
shall maintain 100% ownership of the Common Securities; provided, however, that
                                                        --------  -------
any permitted successor of the Company under this Indenture may succeed to the
Company's ownership of such Common Securities.  The Company, as owner of a
majority of the Common Securities shall cause the Trust (a) to remain a
statutory business trust, except in connection with a distribution

                                       21
<PAGE>

of Debt Securities to the holders of Trust Securities in liquidation of the
Trust, the redemption of all of the Trust Securities or certain mergers,
consolidations or amalgamations, each as permitted by the Declaration, (b) to
otherwise continue to be classified as a grantor trust for United States federal
income tax purposes and (c) to use its reasonable efforts to cause each holder
of Trust Securities to be treated as owning an undivided beneficial interest in
the Debt Securities.

                                  ARTICLE IV
                      SECURITYHOLDERS' LISTS AND REPORTS
                         BY THE COMPANY AND THE TRUSTEE

          SECTION 4.01.  Securityholders' Lists.
                         ----------------------

          The Company covenants and agrees that it will furnish or caused to be
furnished to the Trustee:

          (a)  on each regular record date for the Debt Securities, a list, in
such form as the Trustee may reasonably require, of the names and addresses of
the Securityholders of the Debt Securities as of such record date; and

          (b)  at such other times as the Trustee may request in writing, within
30 days after the receipt by the Company of any such request, a list of similar
form and content as of a date not more than 15 days prior to the time such list
is furnished;

except that no such lists need be furnished under this Section 4.01 so long as
the Trustee is in possession thereof by reason of its acting as Debt Security
registrar.

          SECTION 4.02.  Preservation and Disclosure of Lists.
                         ------------------------------------

          (a)  The Trustee shall preserve, in as current a form as is reasonably
practicable, all information as to the names and addresses of the holders of
Debt Securities (1) contained in the most recent list furnished to it as
provided in Section 4.01 or (2) received by it in the capacity of Debt
Securities registrar (if so acting) hereunder.  The Trustee may destroy any list
furnished to it as provided in Section 4.01 upon receipt of a new list so
furnished.

          (b)  In case three or more holders of Debt Securities (hereinafter
referred to as "applicants") apply in writing to the Trustee and furnish to the
Trustee reasonable proof that each such applicant has owned a Debt Security for
a period of at least six months preceding the date of such application, and such
application states that the applicants desire to communicate with other holders
of Debt Securities with respect to their rights under this Indenture or under
such Debt Securities and is accompanied by a copy of the form of proxy or other
communication which such applicants propose to transmit, then the Trustee shall
within five Business Days after the receipt of such application, at its
election, either:

               (1)  afford such applicants access to the information preserved
     at the time by the Trustee in accordance with the provisions of subsection
     (a) of this Section 4.02, or

                                       22
<PAGE>

               (2)  inform such applicants as to the approximate number of
     holders of Debt Securities whose names and addresses appear in the
     information preserved at the time by the Trustee in accordance with the
     provisions of subsection (a) of this Section 4.02, and as to the
     approximate cost of mailing to such Securityholders the form of proxy or
     other communication, if any, specified in such application.

      If the Trustee shall elect not to afford such applicants access to such
information, the Trustee shall, upon the written request of such applicants,
mail to each Securityholder of Debt Securities whose name and address appear in
the information preserved at the time by the Trustee in accordance with the
provisions of subsection (a) of this Section 4.02 a copy of the form of proxy or
other communication which is specified in such request with reasonable
promptness after a tender to the Trustee of the material to be mailed and of
payment, or provision for the payment, of the reasonable expenses of mailing,
unless within five days after such tender, the Trustee shall mail to such
applicants and file with the Securities and Exchange Commission, if permitted or
required by applicable law, together with a copy of the material to be mailed, a
written statement to the effect that, in the opinion of the Trustee, such
mailing would be contrary to the best interests of the holders of all Debt
Securities, as the case may be, or would be in violation of applicable law.
Such written statement shall specify the basis of such opinion.  If said
Commission, as permitted or required by applicable law, after opportunity for a
hearing upon the objections specified in the written statement so filed, shall
enter an order refusing to sustain any of such objections or if, after the entry
of an order sustaining one or more of such objections, said Commission shall
find, after notice and opportunity for hearing, that all the objections so
sustained have been met and shall enter an order so declaring, the Trustee shall
mail copies of such material to all such Securityholders with reasonable
promptness after the entry of such order and the renewal of such tender;
otherwise the Trustee shall be relieved of any obligation or duty to such
applicants respecting their application.

          (c)  Each and every holder of Debt Securities, by receiving and
holding the same, agrees with Company and the Trustee that neither the Company
nor the Trustee nor any paying agent shall be held accountable by reason of the
disclosure of any such information as to the names and addresses of the holders
of Debt Securities in accordance with the provisions of subsection (b) of this
Section 4.02, regardless of the source from which such information was derived,
and that the Trustee shall not be held accountable by reason of mailing any
material pursuant to a request made under said subsection (b).

                                   ARTICLE V
                  REMEDIES OF THE TRUSTEE AND SECURITYHOLDERS
                           UPON AN EVENT OF DEFAULT

          SECTION 5.01.  Events of Default.
                         -----------------

          The following Events of Default shall be "Events of Default" with
respect to Debt Securities:

          (a)  the Company defaults in the payment of any interest upon any Debt
Security when it becomes due and payable, and continuance of such default for a
period of 30 days; or

                                       23
<PAGE>

          (b)  the Company defaults in the payment of all or any part of the
principal of (or premium, if any, on) any Debt Securities as and when the same
shall become due and payable either at maturity, upon redemption (including
redemption for any sinking fund), by declaration of acceleration or otherwise;
or

          (c)  the Company defaults in the performance of, or breaches, any of
its covenants or agreements in Sections 3.06, 3.07, 3.08 and 3.09 of this
Indenture (other than a covenant or agreement a default in whose performance or
whose breach is elsewhere in this Section specifically dealt with), and
continuance of such default or breach for a period of 90 days after there has
been given, by registered or certified mail, to the Company by the Trustee or to
the Company and the Trustee by the holders of at least 25% in aggregate
principal amount of the outstanding Debt 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

          (d)  a court having jurisdiction in the premises shall enter a decree
or order for relief in respect of the Company in an involuntary case under any
applicable bankruptcy, insolvency or other similar law now or hereafter in
effect, or appointing a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of the Company or for any substantial part of
its property, or ordering the winding-up or liquidation of its affairs and such
decree or order shall remain unstayed and in effect for a period of 90
consecutive days; or

          (e)  the Company shall commence a voluntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, shall
consent to the entry of an order for relief in an involuntary case under any
such law, or shall consent to the appointment of or taking possession by a
receiver, liquidator, assignee, trustee, custodian, sequestrator (or other
similar official) of the Company or of any substantial part of its property, or
shall make any general assignment for the benefit of creditors, or shall fail
generally to pay its debts as they become due; or

          If an Event of Default occurs and is continuing with respect to the
Debt Securities, then, and in each and every such case, unless the principal of
the Debt Securities shall have already become due and payable, either the
Trustee or the holders of not less than 25% in aggregate principal amount of the
Debt Securities then outstanding hereunder, by notice in writing to the Company
(and to the Trustee if given by Securityholders), may declare the entire
principal of the Debt Securities and the interest accrued thereon, if any, to be
due and payable immediately, and upon any such declaration the same shall become
immediately due and payable.

          The foregoing provisions, however, are subject to the condition that
if, at any time after the principal of the Debt Securities shall have been so
declared due and payable, and before any judgment or decree for the payment of
the moneys due shall have been obtained or entered as hereinafter provided, the
Company shall pay or shall deposit with the Trustee a sum sufficient to pay all
matured installments of interest upon all the Debt Securities and the principal
of and premium, if any, on the Debt Securities which shall have become due
otherwise than by acceleration (with interest upon such principal and premium,
if any, and Deferred Interest, to the extent permitted by law) and such amount
as shall be sufficient to cover reasonable compensation to the Trustee and each
predecessor Trustee, their respective agents, attorneys and

                                       24
<PAGE>

counsel, and all other amounts due to the Trustee pursuant to Section 6.06,
and if any and all Events of Default under this Indenture, other than the non-
payment of the principal of or premium, if any, on Debt Securities which shall
have become due by acceleration, shall have been cured, waived or otherwise
remedied as provided herein -- then and in every such case the holders of a
majority in aggregate principal amount of the Debt Securities then outstanding,
by written notice to the Company and to the Trustee, may waive all defaults and
rescind and annul such declaration and its consequences, but no such waiver or
rescission and annulment shall extend to or shall affect any subsequent default
or shall impair any right consequent thereon.

          In case the Trustee shall have proceeded to enforce any right under
this Indenture and such proceedings shall have been discontinued or abandoned
because of such rescission or annulment or for any other reason or shall have
been determined adversely to the Trustee, then and in every such case the
Company, the Trustee and the holders of the Debt Securities shall be restored
respectively to their several positions and rights hereunder, and all rights,
remedies and powers of the Company, the Trustee and the holders of the Debt
Securities shall continue as though no such proceeding had been taken.

          SECTION 5.02.  Payment of Debt Securities on Default; Suit Therefor.
                         ----------------------------------------------------

          The Company covenants that (a) in case default shall be made in the
payment of any installment of interest upon any of the Debt Securities as and
when the same shall become due and payable, and such default shall have
continued for a period of 30 days, or (b) in case default shall be made in the
payment of the principal of or premium, if any, on any of the Debt Securities as
and when the same shall have become due and payable, whether at maturity of the
Debt Securities or upon redemption or by declaration of acceleration or
otherwise -- then, upon demand of the Trustee, the Company will pay to the
Trustee, for the benefit of the holders of the Debt Securities the whole amount
that then shall have become due and payable on all Debt Securities for principal
and premium, if any, or interest, or both, as the case may be, including
Deferred Interest accrued on the Debt Securities; and, in addition thereto, such
further amount as shall be sufficient to cover the costs and expenses of
collection, including a reasonable compensation to the Trustee, its agents,
attorneys and counsel, and any other amounts due to the Trustee under Section
6.06.  In case the Company shall fail forthwith to pay such amounts upon such
demand, the Trustee, in its own name and as trustee of an express trust, shall
be entitled and empowered to institute any actions or proceedings at law or in
equity for the collection of the sums so due and unpaid, and may prosecute any
such action or proceeding to judgment or final decree, and may enforce any such
judgment or final decree against the Company or any other obligor on such Debt
Securities and collect in the manner provided by law out of the property of the
Company or any other obligor on such Debt Securities wherever situated the
moneys adjudged or decreed to be payable.

          In case there shall be pending proceedings for the bankruptcy or for
the reorganization of the Company or any other obligor on the Debt Securities
under Bankruptcy Law, or in case a receiver or trustee shall have been appointed
for the property of the Company or such other obligor, or in the case of any
other similar judicial proceedings relative to the Company or other obligor upon
the Debt Securities, or to the creditors or property of the Company or such
other obligor, the Trustee, irrespective of whether the principal of the Debt
Securities shall then be due and payable as therein expressed or by declaration
of acceleration or

                                       25
<PAGE>

otherwise and irrespective of whether the Trustee shall have made any demand
pursuant to the provisions of this Section 5.02, shall be entitled and
empowered, by intervention in such proceedings or otherwise, to file and prove a
claim or claims for the whole amount of principal and interest owing and unpaid
in respect of the Debt Securities and, in case of any judicial proceedings, to
file such proofs of claim and other papers or documents as may be necessary or
advisable in order to have the claims of the Trustee (including any claim for
reasonable compensation to the Trustee and each predecessor Trustee, and their
respective agents, attorneys and counsel, and for reimbursement of all other
amounts due to the Trustee under Section 6.06) and of the Securityholders
allowed in such judicial proceedings relative to the Company or any other
obligor on the Debt Securities, or to the creditors or property of the Company
or such other obligor, unless prohibited by applicable law and regulations, to
vote on behalf of the holders of the Debt Securities in any election of a
trustee or a standby trustee in arrangement, reorganization, liquidation or
other bankruptcy or insolvency proceedings or Person performing similar
functions in comparable proceedings, and to collect and receive any moneys or
other property payable or deliverable on any such claims, and to distribute the
same after the deduction of its charges and expenses; and any receiver, assignee
or trustee in bankruptcy or reorganization is hereby authorized by each of the
Securityholders to make such payments to the Trustee, and, in the event that the
Trustee shall consent to the making of such payments directly to the
Securityholders, to pay to the Trustee such amounts as shall be sufficient to
cover reasonable compensation to the Trustee, each predecessor Trustee and their
respective agents, attorneys and counsel, and all other amounts due to the
Trustee under Section 6.06.

          Nothing herein contained shall be construed to authorize the Trustee
to authorize or consent to or accept or adopt on behalf of any Securityholder
any plan of reorganization, arrangement, adjustment or composition affecting the
Debt Securities or the rights of any holder thereof or to authorize the Trustee
to vote in respect of the claim of any Securityholder in any such proceeding.

          All rights of action and of asserting claims under this Indenture, or
under any of the Debt Securities, may be enforced by the Trustee without the
possession of any of the Debt Securities, or the production thereof at any trial
or other proceeding relative thereto, and any such suit or proceeding instituted
by the Trustee shall be brought in its own name as trustee of an express trust,
and any recovery of judgment shall be for the ratable benefit of the holders of
the Debt Securities.

          In any proceedings brought by the Trustee (and also any proceedings
involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party) the Trustee shall be held to represent all the holders
of the Debt Securities, and it shall not be necessary to make any holders of the
Debt Securities parties to any such proceedings.

          SECTION 5.03.  Application of Moneys Collected by Trustee.
                         ------------------------------------------

          Any moneys collected by the Trustee shall be applied in the following
order, at the date or dates fixed by the Trustee for the distribution of such
moneys, upon presentation of the several Debt Securities in respect of which
moneys have been collected, and stamping thereon the payment, if only partially
paid, and upon surrender thereof if fully paid:

                                       26
<PAGE>

          First: To the payment of costs and expenses incurred by, and
reasonable fees of, the Trustee, its agents, attorneys and counsel, and of all
other amounts due to the Trustee under Section 6.06;

          Second: To the payment of all Senior Indebtedness of the Company if
and to the extent required by Article XV;

          Third:  To the payment of the amounts then due and unpaid upon Debt
Securities for principal (and premium, if any), and interest on the Debt
Securities, in respect of which or for the benefit of which money has been
collected, ratably, without preference or priority of any kind, according to the
amounts due on such Debt Securities for principal (and premium, if any) and
interest, respectively; and

          Fourth: The balance, if any, to the Company.

          SECTION 5.04.  Proceedings by Securityholders.
                         ------------------------------

          No holder of any Debt Security shall have any right to institute any
suit, action or proceeding for any remedy hereunder, unless such holder
previously shall have given to the Trustee written notice of an Event of Default
with respect to the Debt Securities and unless the holders of not less than 25%
in aggregate principal amount of the Debt Securities then outstanding shall have
given the Trustee a written request to institute such action, suit or proceeding
and shall have offered to the Trustee such reasonable indemnity as it may
require against the costs, expenses and liabilities to be incurred thereby, and
the Trustee for 60 days after its receipt of such notice, request and offer of
indemnity shall have failed to institute any such action, suit or proceeding;
provided, that no holder of Debt Securities shall have any right to prejudice
--------
the rights of any other holder of Debt Securities, obtain priority or preference
over any other such holder or enforce any right under this Indenture except in
the manner herein provided and for the equal, ratable and common benefit of all
holders of Debt Securities.

          Notwithstanding any other provisions in this Indenture, however, the
right of any holder of any Debt Security to receive payment of the principal of,
premium, if any, and interest, on such Debt Security when due, or to institute
suit for the enforcement of any such payment, shall not be impaired or affected
without the consent of such holder.  For the protection and enforcement of the
provisions of this Section, each and every Securityholder and the Trustee shall
be entitled to such relief as can be given either at law or in equity.

          SECTION 5.05.  Proceedings by Trustee.
                         ----------------------

          In case of an Event of Default hereunder the Trustee may in its
discretion proceed to protect and enforce the rights vested in it by this
Indenture by such appropriate judicial proceedings as the Trustee shall deem
most effectual to protect and enforce any of such rights, either by suit in
equity or by action at law or by proceeding in bankruptcy or otherwise, whether
for the specific enforcement of any covenant or agreement contained in this
Indenture or in aid of the exercise of any power granted in this Indenture, or
to enforce any other legal or equitable right vested in the Trustee by this
Indenture or by law.

          SECTION 5.06.  Remedies Cumulative and Continuing.
                         ----------------------------------

                                       27
<PAGE>

          Except as otherwise provided in Section 2.06, all powers and remedies
given by this Article V to the Trustee or to the Securityholders shall, to the
extent permitted by law, be deemed cumulative and not exclusive of any other
powers and remedies available to the Trustee or the holders of the Debt
Securities, by judicial proceedings or otherwise, to enforce the performance or
observance of the covenants and agreements contained in this Indenture or
otherwise established with respect to the Debt Securities, and no delay or
omission of the Trustee or of any holder of any of the Debt Securities to
exercise any right or power accruing upon any Event of Default occurring and
continuing as aforesaid shall impair any such right or power, or shall be
construed to be a waiver of any such default or an acquiescence therein; and,
subject to the provisions of Section 5.04, every power and remedy given by this
Article V or by law to the Trustee or to the Securityholders may be exercised
from time to time, and as often as shall be deemed expedient, by the Trustee or
by the Securityholders.

          SECTION 5.07.  Direction of Proceedings and Waiver of Defaults by
                         --------------------------------------------------
Majority of Securityholders.
---------------------------

          The holders of a majority in aggregate principal amount of the Debt
Securities affected (voting as one class) at the time outstanding shall have the
right to direct the time, method, and place of conducting any proceeding for any
remedy available to the Trustee, or exercising any trust or power conferred on
the Trustee with respect to such Debt Securities; provided, however, that
                                                  --------  -------
(subject to the provisions of Section 6.01) the Trustee shall have the right to
decline to follow any such direction if the Trustee shall determine that the
action so directed would be unjustly prejudicial to the holders not taking part
in such direction or if the Trustee being advised by counsel determines that the
action or proceeding so directed may not lawfully be taken or if a Responsible
Officer of the Trustee shall determine that the action or proceedings so
directed would involve the Trustee in personal liability.  Prior to any
declaration accelerating the maturity of the Debt Securities, the holders of a
majority in aggregate principal amount of the Debt Securities at the time
outstanding may on behalf of the holders of all of the Debt Securities waive (or
modify any previously granted waiver of) any past default or Event of Default
and its consequences, except a default (a) in the payment of principal of,
premium, if any, or interest on any of the Debt Securities, (b) in respect of
covenants or provisions hereof which cannot be modified or amended without the
consent of the holder of each Debt Security affected, or (c)  in respect of the
covenants contained in Section 3.09; provided, however, that if the Debt
                                     --------  -------
Securities are held by the Trust or a trustee of such trust, such waiver or
modification to such waiver shall not be effective until the holders of a
majority in liquidation preference of Trust Securities of the Trust shall have
consented to such waiver or modification to such waiver; provided, further, that
if the consent of the holder of each outstanding Debt Security is required, such
waiver shall not be effective until each holder of the Trust Securities of the
Trust shall have consented to such waiver.  Upon any such waiver, the default
covered thereby shall be deemed to be cured for all purposes of this Indenture
and the Company, the Trustee and the holders of the Debt Securities shall be
restored to their former positions and rights hereunder, respectively; but no
such waiver shall extend to any subsequent or other default or Event of Default
or impair any right consequent thereon.  Whenever any default or Event of
Default hereunder shall have been waived as permitted by this Section 5.07, said
default or Event of Default shall for all purposes of the Debt Securities and
this Indenture be deemed to have been cured and to be not continuing.

          SECTION 5.08.  Notice of Defaults.
                         ------------------

                                       28
<PAGE>

          The Trustee shall, within 90 days after a Responsible Officer of the
Trustee shall have received notice or obtained actual knowledge of the
occurrence of a default with respect to the Debt Securities, mail to all
Securityholders, as the names and addresses of such holders appear upon the Debt
Security Register, notice of all defaults with respect to the Debt Securities
known to the Trustee, unless such defaults shall have been cured before the
giving of such notice (the term "defaults" for the purpose of this Section 5.08
being hereby defined to be the events specified in subsections (a), (b), (c),
(d) and (e) of Section 5.01, not including periods of grace, if any, provided
for therein); provided, that, except in the case of default in the payment of
              --------
the principal of, premium, if any, or interest on any of the Debt Securities,
the Trustee shall be protected in withholding such notice if and so long as a
Responsible Officer of the Trustee in good faith determines that the withholding
of such notice is in the interests of the Securityholders.

          SECTION 5.09.  Undertaking to Pay Costs.
                         ------------------------

          All parties to this Indenture agree, and each holder of any Debt
Security by his acceptance thereof shall be deemed to have agreed, that any
court may in its discretion require, in any suit for the enforcement of any
right or remedy under this Indenture, or in any suit against the Trustee for any
action taken or omitted by it as Trustee, the filing by any party litigant in
such suit of an undertaking to pay the costs of such suit, and that such court
may in its discretion assess reasonable costs, including reasonable attorneys'
fees and expenses, against any party litigant in such suit, having due regard to
the merits and good faith of the claims or defenses made by such party litigant;
but the provisions of this Section 5.09 shall not apply to any suit instituted
by the Trustee, to any suit instituted by any Securityholder, or group of
Securityholders, holding in the aggregate more than 10% in principal amount of
the Debt Securities outstanding, or to any suit instituted by any Securityholder
for the enforcement of the payment of the principal of (or premium, if any) or
interest on any Debt Security against the Company on or after the same shall
have become due and payable.

                                   ARTICLE VI
                             CONCERNING THE TRUSTEE

          SECTION 6.01.  Duties and Responsibilities of Trustee.
                         --------------------------------------

          With respect to the holders of Debt Securities issued hereunder, the
Trustee, prior to the occurrence of an Event of Default with respect to the Debt
Securities and after the curing or waiving of all Events of Default which may
have occurred, with respect to the Debt Securities, undertakes to perform such
duties and only such duties as are specifically set forth in this Indenture. In
case an Event of Default with respect to the Debt Securities has occurred (which
has not been cured or waived) the Trustee shall exercise such of the rights and
powers vested in it by this Indenture, and use the same degree of care and skill
in their exercise, as a prudent man would exercise or use under the
circumstances in the conduct of his own affairs.

          No provision of this Indenture shall be construed to relieve the
Trustee from liability for its own negligent action, its own negligent failure
to act or its own willful misconduct, except that:

                                       29
<PAGE>

          (a)  prior to the occurrence of an Event of Default with respect to
Debt Securities and after the curing or waiving of all Events of Default which
may have occurred

               (1)  the duties and obligations of the Trustee with respect to
     Debt Securities shall be determined solely by the express provisions of
     this Indenture, and the Trustee shall not be liable except for the
     performance of such duties and obligations with respect to the Debt
     Securities as are specifically set forth in this Indenture, and no implied
     covenants or obligations shall be read into this Indenture against the
     Trustee, and

               (2)  in the absence of bad faith on the part of the Trustee, the
     Trustee may conclusively rely, as to the truth of the statements and the
     correctness of the opinions expressed therein, upon any certificates or
     opinions furnished to the Trustee and conforming to the requirements of
     this Indenture; but, in the case of any such certificates or opinions which
     by any provision hereof are specifically required to be furnished to the
     Trustee, the Trustee shall be under a duty to examine the same to determine
     whether or not they conform to the requirements of this Indenture;

          (b)  the Trustee shall not be liable for any error of judgment made in
good faith by a Responsible Officer or Officers of the Trustee, unless it shall
be proved that the Trustee was negligent in ascertaining the pertinent facts;
and

          (c)  the 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 Securityholders pursuant to Section 5.07, relating to the time, method and
place of conducting any proceeding for any remedy available to the Trustee, or
exercising any trust or power conferred upon the Trustee, under this Indenture.

          None of the provisions contained in this Indenture shall require the
Trustee to expend or risk its own funds or otherwise incur personal financial
liability in the performance of any of its duties or in the exercise of any of
its rights or powers.

          SECTION 6.02.  Reliance on Documents, Opinions, etc.
                         ------------------------------------

          Except as otherwise provided in Section 6.01:

          (a)  the Trustee may conclusively rely and shall be fully protected in
acting or refraining from acting upon any resolution, certificate, statement,
instrument, opinion, report, notice, request, consent, order, bond, note,
debenture 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)  any request, direction, order or demand of the Company mentioned
herein shall be sufficiently evidenced by an Officers' Certificate (unless other
evidence in respect thereof be herein specifically prescribed); and any Board
Resolution may be evidenced to the Trustee by a copy thereof certified by the
Secretary or an Assistant Secretary of the Company;

          (c)  the Trustee may consult with counsel of its selection and any
advice or Opinion of Counsel shall be full and complete authorization and
protection in respect of any

                                       30
<PAGE>

action taken, suffered or omitted by it hereunder in good faith and in
accordance with such advice or Opinion of Counsel;

          (d) the Trustee shall be under no obligation to exercise any of the
rights or powers vested in it by this Indenture at the request, order or
direction of any of the Securityholders, pursuant to the provisions of this
Indenture, unless such Securityholders shall have offered to the Trustee
reasonable security or indemnity against the costs, expenses and liabilities
which may be incurred therein or thereby;

          (e) the Trustee shall not be liable for any action taken or omitted by
it in good faith and believed by it to be authorized or within the discretion or
rights or powers conferred upon it by this Indenture; nothing contained herein
shall, however, relieve the Trustee of the obligation, upon the occurrence of an
Event of Default with respect to the Debt Securities (that has not been cured or
waived) to exercise with respect to Debt Securities such of the rights and
powers vested in it by this Indenture, and to use the same degree of care and
skill in their exercise, as a prudent man would exercise or use under the
circumstances in the conduct of his own affairs;

          (f) the 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,
coupon or other paper or document, unless requested in writing to do so by the
holders of not less than a majority in principal amount of the outstanding Debt
Securities affected thereby; provided, however, that if the payment within a
                             --------  -------
reasonable time to the Trustee of the costs, expenses or liabilities likely to
be incurred by it in the making of such investigation is, in the opinion of the
Trustee, not reasonably assured to the Trustee by the security afforded to it by
the terms of this Indenture, the Trustee may require reasonable indemnity
against such expense or liability as a condition to so proceeding;

          (g) the Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through agents (including
any Authenticating Agent) or attorneys, and the Trustee shall not be responsible
for any misconduct or negligence on the part of any such agent or attorney
appointed by it with due care; and

          (h) the Trustee shall not be charged with knowledge of any Default or
Event of Default with respect to the Debt Securities unless either (1) a
Responsible Officer shall have actual knowledge of such Default or Event of
Default or (2) written notice of such Default or Event of Default shall have
been given to the Trustee by the Company or any other obligor on the Debt
Securities or by any holder of the Debt Securities.

          SECTION 6.03.  No Responsibility for Recitals, etc.
                         -----------------------------------

          The recitals contained herein and in the Debt Securities (except in
the certificate of authentication of the Trustee or the Authenticating Agent)
shall be taken as the statements of the Company and the Trustee and the
Authenticating Agent assume no responsibility for the correctness of the same.
The Trustee and the Authenticating Agent make no representations as to the
validity or sufficiency of this Indenture or of the Debt Securities.  The
Trustee and the Authenticating Agent shall not be accountable for the use or
application by the Company of any

                                       31
<PAGE>

Debt Securities or the proceeds of any Debt Securities authenticated and
delivered by the Trustee or the Authenticating Agent in conformity with the
provisions of this Indenture.

          SECTION 6.04.  Trustee, Authenticating Agent, Paying Agents, Transfer
                         ------------------------------------------------------
Agents or Registrar May Own Debt Securities.
-------------------------------------------

          The Trustee or any Authenticating Agent or any paying agent or any
transfer agent or any Debt Security registrar, in its individual or any other
capacity, may become the owner or pledgee of Debt Securities with the same
rights it would have if it were not Trustee, Authenticating Agent, paying agent,
transfer agent or Debt Security registrar.

          SECTION 6.05.  Moneys to be Held in Trust.
                         --------------------------

          Subject to the provisions of Section 12.04, all moneys received by the
Trustee or any paying agent shall, until used or applied as herein provided, be
held in trust for the purpose for which they were received, but need not be
segregated from other funds except to the extent required by law.  The Trustee
and any paying agent shall be under no liability for interest on any money
received by it hereunder except as otherwise agreed in writing with the Company.
So long as no Event of Default shall have occurred and be continuing, all
interest allowed on any such moneys shall be paid from time to time upon the
written order of the Company, signed by the Chairman of the Board of Directors,
the President, the Chief Operating Officer, a Managing Director, a Vice
President, the Treasurer or an Assistant Treasurer of the Company.

          SECTION 6.06.  Compensation and Expenses of Trustee.
                         ------------------------------------

          The Company covenants and agrees to pay to the Trustee from time to
time, and the Trustee shall be entitled to, such compensation as shall be agreed
to in writing between the Company and the Trustee (which shall not be limited by
any provision of law in regard to the compensation of a trustee of an express
trust), and the Company will pay or reimburse the Trustee upon its request for
all reasonable expenses, disbursements and advances incurred or made by the
Trustee in accordance with any of the provisions of this Indenture (including
the reasonable compensation and the expenses and disbursements of its counsel
and of all Persons not regularly in its employ) except any such expense,
disbursement or advance as may arise from its negligence or bad faith.  The
Company also covenants to indemnify each of the Trustee or any predecessor
Trustee (and its officers, agents, directors and employees) for, and to hold it
harmless against, any and all loss, damage, claim, liability or expense
including taxes (other than taxes based on the income of the Trustee) incurred
without negligence or bad faith on the part of the Trustee and arising out of or
in connection with the acceptance or administration of this trust, including the
costs and expenses of defending itself against any claim of liability in the
premises.  The obligations of the Company under this Section 6.06 to compensate
and indemnify the Trustee and to pay or reimburse the Trustee for expenses,
disbursements and advances shall constitute additional indebtedness hereunder.
Such additional indebtedness shall be secured by a lien prior to that of the
Debt Securities upon all property and funds held or collected by the Trustee as
such, except funds held in trust for the benefit of the holders of particular
Debt Securities.

                                       32
<PAGE>

          Without prejudice to any other rights available to the Trustee under
applicable law, when the Trustee incurs expenses or renders services in
connection with an Event of Default specified in subsections (c), (d) or (e) of
Section 5.01, the expenses (including the reasonable charges and expenses of its
counsel) and the compensation for the services are intended to constitute
expenses of administration under any applicable federal or state bankruptcy,
insolvency or other similar law.

          The provisions of this Section shall survive the resignation or
removal of the Trustee and the defeasance or other termination of this
Indenture.

          SECTION 6.07.  Officers' Certificate as Evidence.
                         ---------------------------------

          Except as otherwise provided in Sections 6.01 and 6.02, whenever in
the administration of the provisions of this Indenture the Trustee shall deem it
necessary or desirable that a matter be proved or established prior to taking or
omitting any action hereunder, such matter (unless other evidence in respect
thereof be herein specifically prescribed) may, in the absence of negligence or
bad faith on the part of the Trustee, be deemed to be conclusively proved and
established by an Officers' Certificate delivered to the Trustee, and such
certificate, in the absence of negligence or bad faith on the part of the
Trustee, shall be full warrant to the Trustee for any action taken or omitted by
it under the provisions of this Indenture upon the faith thereof.

          SECTION 6.08.  Eligibility of Trustee.
                         ----------------------

          The Trustee hereunder shall at all times be a corporation organized
and doing business under the laws of the United States of America or any state
or territory thereof or of the District of Columbia or a corporation or other
Person authorized under such laws to exercise corporate trust powers, having a
combined capital and surplus of at least 50 million U.S. dollars ($50,000,000)
and subject to supervision or examination by federal, state, territorial, or
District of Columbia authority.  If such corporation publishes reports of
condition at least annually, pursuant to law or to the requirements of the
aforesaid supervising or examining authority, then for the purposes of this
Section 6.08 the combined capital and surplus of such corporation shall be
deemed to be its combined capital and surplus as set forth in its most recent
records of condition so published.

          The Company may not, nor may any Person directly or indirectly
controlling, controlled by, or under common control with the Company, serve as
Trustee; provided, that such corporation shall be otherwise eligible and
         --------
qualified under this Article.

          In case at any time the Trustee shall cease to be eligible in
accordance with the provisions of this Section 6.08, the Trustee shall resign
immediately in the manner and with the effect specified in Section 6.09.

          If the Trustee has or shall acquire any "conflicting interest" within
the meaning of (S) 310(b) of the Trust Indenture Act, the Trustee shall either
eliminate such interest or resign, to the extent and in the manner provided by,
and subject to this Indenture.

          SECTION 6.09.  Resignation or Removal of Trustee.
                         ---------------------------------

                                       33
<PAGE>

          (a) The Trustee, or any trustee or trustees hereafter appointed, may
at any time resign by giving written notice of such resignation to the Company
and by mailing notice thereof, at the Company's expense, to the holders of the
Debt Securities at their addresses as they shall appear on the Debt Security
Register.  Upon receiving such notice of resignation, the Company shall promptly
appoint a successor trustee or trustees by written instrument, in duplicate,
executed by order of its Board of Directors, one copy of which instrument shall
be delivered to the resigning Trustee and one copy to the successor Trustee.  If
no successor Trustee shall have been so appointed and have accepted appointment
within 30 days after the mailing of such notice of resignation to the affected
Securityholders, the resigning Trustee may petition any court of competent
jurisdiction for the appointment of a successor Trustee, or any Securityholder
who has been a bona fide holder of a Debt Security or Debt Securities for at
least six months may, subject to the provisions of Section 5.09, on behalf of
himself and all others similarly situated, petition any such court for the
appointment of a successor Trustee.  Such court may thereupon, after such
notice, if any, as it may deem proper and prescribe, appoint a successor
Trustee.

          (b) In case at any time any of the following shall occur:

              (1)  the Trustee shall fail to comply with the provisions of
     Section 6.08 after written request therefor by the Company or by any
     Securityholder who has been a bona fide holder of a Debt Security or Debt
     Securities for at least six months,

              (2)  the Trustee shall cease to be eligible in accordance with the
     provisions of Section 6.08 and shall fail to resign after written request
     therefor by the Company or by any such Securityholder, or

              (3)  the Trustee shall become incapable of acting, or shall be
     adjudged a bankrupt or insolvent, or a receiver of the Trustee or of its
     property shall be appointed, or any public officer shall take charge or
     control of the Trustee or of its property or affairs for the purpose of
     rehabilitation, conservation or liquidation,

then, in any such case, the Company may remove the Trustee and appoint a
successor Trustee by written instrument, in duplicate, executed by order of the
Board of Directors, one copy of which instrument shall be delivered to the
Trustee so removed and one copy to the successor Trustee, or, subject to the
provisions of Section 5.09, any Securityholder who has been a bona fide holder
of a Debt Security or Debt Securities for at least six months may, on behalf of
himself and all others similarly situated, petition any court of competent
jurisdiction for the removal of the Trustee and the appointment of a successor
Trustee.  Such court may thereupon, after such notice, if any, as it may deem
proper and prescribe, remove the Trustee and appoint successor Trustee.

          (c) Upon prior written notice to the Company and the Trustee, the
holders of a majority in aggregate principal amount of the Debt Securities at
the time outstanding may at any time remove the Trustee and nominate a successor
Trustee, which shall be deemed appointed as successor Trustee unless within ten
Business Days after such nomination the Company objects thereto, in which case
or in the case of a failure by such holders to nominate a successor Trustee, the
Trustee so removed or any Securityholder, upon the terms and conditions and
otherwise as in

                                       34
<PAGE>

subsection (a) of this Section 6.09 provided, may petition any court of
competent jurisdiction for an appointment of a successor.

          (d) Any resignation or removal of the Trustee and appointment of a
successor Trustee pursuant to any of the provisions of this Section 6.09 shall
become effective upon acceptance of appointment by the successor Trustee as
provided in Section 6.10.

          SECTION 6.10.  Acceptance by Successor Trustee.
                         -------------------------------

          Any successor Trustee appointed as provided in Section 6.09 shall
execute, acknowledge and deliver to the Company and to its predecessor Trustee
an instrument accepting such appointment hereunder, and thereupon the
resignation or removal of the retiring Trustee shall become effective and such
successor Trustee, without any further act, deed or conveyance, shall become
vested with all the rights, powers, duties and obligations with respect to the
Debt Securities of its predecessor hereunder, with like effect as if originally
named as Trustee herein; but, nevertheless, on the written request of the
Company or of the successor Trustee, the Trustee ceasing to act shall, upon
payment of any amounts then due it pursuant to the provisions of Section 6.06,
execute and deliver an instrument transferring to such successor Trustee all the
rights and powers of the Trustee so ceasing to act and shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee thereunder.  Upon request of any such successor Trustee,
the Company shall execute any and all instruments in writing for more fully and
certainly vesting in and confirming to such successor Trustee all such rights
and powers.  Any Trustee ceasing to act shall, nevertheless, retain a lien upon
all property or funds held or collected by such Trustee to secure any amounts
then due it pursuant to the provisions of Section 6.06.

          If a successor Trustee is appointed, the Company, the retiring Trustee
and the  successor Trustee shall execute and deliver an indenture supplemental
hereto which shall contain such provisions as shall be deemed necessary or
desirable to confirm that all the rights, powers, trusts and duties of the
retiring Trustee with respect to the Debt Securities as to which the predecessor
Trustee is not retiring shall continue to be vested in the predecessor Trustee,
and shall add to or change any of the provisions of this Indenture as shall be
necessary to provide for or facilitate the administration of the Trust hereunder
by more than one Trustee, it being understood that nothing herein or in such
supplemental indenture shall constitute such Trustees co-trustees of the same
trust and that each such Trustee shall be Trustee of a trust or trusts hereunder
separate and apart from any trust or trusts hereunder administered by any other
such Trustee.

          No successor Trustee shall accept appointment as provided in this
Section 6.10 unless at the time of such acceptance such successor Trustee shall
be eligible under the provisions of Section 6.08.

          In no event shall a retiring Trustee be liable for the acts or
omissions of any successor Trustee hereunder.

          Upon acceptance of appointment by a successor Trustee as provided in
this Section 6.10, the Company shall mail notice of the succession of such
Trustee hereunder to the

                                       35
<PAGE>

holders of Debt Securities at their addresses as they shall appear on the Debt
Security Register. If the Company fails to mail such notice within ten Business
Days after the acceptance of appointment by the successor Trustee, the successor
Trustee shall cause such notice to be mailed at the expense of the Company.

          SECTION 6.11.  Succession by Merger, etc.
                         -------------------------

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

          In case at the time such successor to the Trustee shall succeed to the
trusts created by this Indenture any of the Debt Securities shall have been
authenticated but not delivered, any such successor to the Trustee may adopt the
certificate of authentication of any predecessor Trustee, and deliver such Debt
Securities so authenticated; and in case at that time any of the Debt Securities
shall not have been authenticated, any successor to the Trustee may authenticate
such Debt Securities either in the name of any predecessor hereunder or in the
name of the successor Trustee; and in all such cases such certificates shall
have the full force which it is anywhere in the Debt Securities or in this
Indenture provided that the certificate of the Trustee shall have; provided,
                                                                   --------
however, that the right to adopt the certificate of authentication of any
-------
predecessor Trustee or authenticate Debt Securities in the name of any
predecessor Trustee shall apply only to its successor or successors by merger,
conversion or consolidation.

                                       36
<PAGE>

          SECTION 6.12.  Authenticating Agents.
                         ---------------------

          There may be one or more Authenticating Agents appointed by the
Trustee upon the request of the Company with power to act on its behalf and
subject to its direction in the authentication and delivery of Debt Securities
issued upon exchange or registration of transfer thereof as fully to all intents
and purposes as though any such Authenticating Agent had been expressly
authorized to authenticate and deliver Debt Securities; provided, that the
                                                        --------
Trustee shall have no liability to the Company for any acts or omissions of the
Authenticating Agent with respect to the authentication and delivery of Debt
Securities.  Any such Authenticating Agent shall at all times be a corporation
organized and doing business under the laws of the United States or of any state
or territory thereof or of the District of Columbia authorized under such laws
to act as Authenticating Agent, having a combined capital and surplus of at
least $5,000,000 and being subject to supervision or examination by federal,
state, territorial or District of Columbia authority.  If such corporation
publishes reports of condition at least annually pursuant to law or the
requirements of such authority, then for the purposes of this Section 6.12 the
combined capital and surplus of such corporation 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 an Authenticating Agent shall cease to be eligible
in accordance with the provisions of this Section, it shall resign immediately
in the manner and with the effect herein specified in this Section.

          Any corporation into which any Authenticating Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, consolidation or conversion to which any Authenticating Agent
shall be a party, or any corporation succeeding to all or substantially all of
the corporate trust business of any Authenticating Agent, shall be the successor
of such Authenticating Agent hereunder, if such successor corporation is
otherwise eligible under this Section 6.12 without the execution or filing of
any paper or any further act on the part of the parties hereto or such
Authenticating Agent.

          Any Authenticating Agent may at any time resign by giving written
notice of resignation to the Trustee and to the Company.  The Trustee may at any
time terminate the agency of any Authenticating Agent with respect to the Debt
Securities by giving written notice of termination to such Authenticating Agent
and to the Company.  Upon receiving such a notice of resignation or upon such a
termination, or in case at any time any Authenticating Agent shall cease to be
eligible under this Section 6.12, the Trustee may, and upon the request of the
Company shall, promptly appoint a successor Authenticating Agent eligible under
this Section 6.12, shall give written notice of such appointment to the Company
and shall mail notice of such appointment to all holders of Debt Securities as
the names and addresses of such holders appear on the Debt Security Register.
Any successor Authenticating Agent upon acceptance of its appointment hereunder
shall become vested with all rights, powers, duties and responsibilities with
respect to the Debt Securities of its predecessor hereunder, with like effect as
if originally named as Authenticating Agent herein.

          The Company agrees to pay to any Authenticating Agent from time to
time reasonable compensation for its services.  Any Authenticating Agent shall
have no responsibility or liability for any action taken by it as such in
accordance with the directions of the Trustee.

                                       37
<PAGE>

                                 ARTICLE VII
                        CONCERNING THE SECURITYHOLDERS

          SECTION 7.01.  Action by Securityholders.
                         -------------------------

          Whenever in this Indenture it is provided that the holders of a
specified percentage in aggregate principal amount of the Debt Securities may
take any action (including the making of any demand or request, the giving of
any notice, consent or waiver or the taking of any other action) the fact that
at the time of taking any such action the holders of such specified percentage
have joined therein may be evidenced (a) by any instrument or any number of
instruments of similar tenor executed by such Securityholders in person or by
agent or proxy appointed in writing, (b) by the record of such holders of Debt
Securities voting in favor thereof at any meeting of such Securityholders duly
called and held in accordance with the provisions of Article VIII, (c) by a
combination of such instrument or instruments and any such record of such a
meeting of such Securityholders or (d) by any other method the Trustee deems
satisfactory.

          If the Company shall solicit from the Securityholders any request,
demand, authorization, direction, notice, consent, waiver or other action or
revocation of the same, the Company may, at its option, as evidenced by an
Officers' Certificate, fix in advance a record date for such Debt Securities for
the determination of Securityholders entitled to give such request, demand,
authorization, direction, notice, consent, waiver or other action or revocation
of the same, but the Company shall have no obligation to do so.  If such a
record date is fixed, such request, demand, authorization, direction, notice,
consent, waiver or other action or revocation of the same may be given before or
after the record date, but only the Securityholders of record at the close of
business on the record date shall be deemed to be Securityholders for the
purposes of determining whether Securityholders of the requisite proportion of
outstanding Debt Securities have authorized or agreed or consented to such
request, demand, authorization, direction, notice, consent, waiver or other
action or revocation of the same, and for that purpose the outstanding Debt
Securities shall be computed as of the record date; provided, however, that no
                                                    --------  -------
such authorization, agreement or consent by such Securityholders on the record
date shall be deemed effective unless it shall become effective pursuant to the
provisions of this Indenture not later than six months after the record date.

          SECTION 7.02.  Proof of Execution by Securityholders.
                         -------------------------------------

          Subject to the provisions of Sections 6.01, 6.02 and 8.05, proof of
the execution of any instrument by a Securityholder or his agent or proxy shall
be sufficient if made in accordance with such reasonable rules and regulations
as may be prescribed by the Trustee or in such manner as shall be satisfactory
to the Trustee.  The ownership of Debt Securities shall be proved by the Debt
Security Register or by a certificate of the Debt Security registrar.  The
Trustee may require such additional proof of any matter referred to in this
Section as it shall deem necessary.

          The record of any Securityholders' meeting shall be proved in the
manner provided in Section 8.06.

                                       38
<PAGE>

          SECTION 7.03.  Who Are Deemed Absolute Owners.
                         ------------------------------

          Prior to due presentment for registration of transfer of any Debt
Security, the Company, the Trustee, any Authenticating Agent, any paying agent,
any transfer agent and any Debt Security registrar may deem the Person in whose
name such Debt Security shall be registered upon the Debt Security Register to
be, and may treat him as, the absolute owner of such Debt Security (whether or
not such Debt Security shall be overdue) for the purpose of receiving payment of
or on account of the principal of, premium, if any, and interest on such Debt
Security and for all other purposes; and neither the Company nor the Trustee nor
any Authenticating Agent nor any paying agent nor any transfer agent nor any
Debt Security registrar shall be affected by any notice to the contrary.  All
such payments so made to any holder for the time being or upon his order shall
be valid, and, to the extent of the sum or sums so paid, effectual to satisfy
and discharge the liability for moneys payable upon any such Debt Security.

          SECTION 7.04.  Debt Securities Owned by Company Deemed Not
                         -------------------------------------------
Outstanding.
-----------

          In determining whether the holders of the requisite aggregate
principal amount of Debt Securities have concurred in any direction, consent or
waiver under this Indenture, Debt Securities which are owned by the Company or
any other obligor on the Debt Securities or by any Person directly or indirectly
controlling or controlled by or under direct or indirect common control with the
Company or any other obligor on the Debt Securities shall be disregarded and
deemed not to be outstanding for the purpose of any such determination;
provided, that for the purposes of determining whether the Trustee shall be
--------
protected in relying on any such direction, consent or waiver, only Debt
Securities which a Responsible Officer of the Trustee actually knows are so
owned shall be so disregarded. Debt Securities so owned which have been pledged
in good faith may be regarded as outstanding for the purposes of this Section
7.04 if the pledgee shall establish to the satisfaction of the Trustee the
pledgee's right to vote such Debt Securities and that the pledgee is not the
Company or any such other obligor or Person directly or indirectly controlling
or controlled by or under direct or indirect common control with the Company or
any such other obligor. In the case of a dispute as to such right, any decision
by the Trustee taken upon the advice of counsel shall be full protection to the
Trustee.

          SECTION 7.05.  Revocation of Consents; Future Holders Bound.
                         --------------------------------------------

          At any time prior to (but not after) the evidencing to the Trustee, as
provided in Section 7.01, of the taking of any action by the holders of the
percentage in aggregate principal amount of the Debt Securities specified in
this Indenture in connection with such action, any holder (in cases where no
record date has been set pursuant to Section 7.01) or any holder as of an
applicable record date (in cases where a record date has been set pursuant to
Section 7.01) of a Debt Security (or any Debt Security issued in whole or in
part in exchange or substitution therefor) the serial number of which is shown
by the evidence to be included in the Debt Securities the holders of which have
consented to such action may, by filing written notice with the Trustee at the
Principal Office of the Trustee and upon proof of holding as provided in Section
7.02, revoke such action so far as concerns such Debt Security (or so far as
concerns the principal amount represented by any exchanged or substituted Debt
Security).  Except as aforesaid any such action taken by the holder of any Debt
Security shall be conclusive and binding upon such holder and upon all future
holders and owners of such Debt Security, and of

                                       39
<PAGE>

any Debt Security issued in exchange or substitution therefor or on registration
of transfer thereof, irrespective of whether or not any notation in regard
thereto is made upon such Debt Security or any Debt Security issued in exchange
or substitution therefor.

                                 ARTICLE VIII
                           SECURITYHOLDERS' MEETINGS

          SECTION 8.01.  Purposes of Meetings.
                         --------------------

          A meeting of Securityholders may be called at any time and from time
to time pursuant to the provisions of this Article VIII for any of the following
purposes:

          (a) to give any notice to the Company or to the Trustee, or to give
any directions to the Trustee, or to consent to the waiving of any default
hereunder and its consequences, or to take any other action authorized to be
taken by Securityholders pursuant to any of the provisions of Article V;

          (b) to remove the Trustee and nominate a successor trustee pursuant to
the provisions of Article VI;

          (c) to consent to the execution of an indenture or indentures
supplemental hereto pursuant to the provisions of Section 9.02; or

          (d) to take any other action authorized to be taken by or on behalf of
the holders of any specified aggregate principal amount of such Debt Securities
under any other provision of this Indenture or under applicable law.

          SECTION 8.02.  Call of Meetings by Trustee.
                         ---------------------------

          The Trustee may at any time call a meeting of Securityholders to take
any action specified in Section 8.01, to be held at such time and at such place
in Palo Alto, Menlo Park or San Francisco, as the Trustee shall determine.
Notice of every meeting of the Securityholders, setting forth the time and the
place of such meeting and in general terms the action proposed to be taken at
such meeting, shall be mailed to holders of Debt Securities affected at their
addresses as they shall appear on the Debt Securities Register.  Such notice
shall be mailed not less than 20 nor more than 180 days prior to the date fixed
for the meeting.

          SECTION 8.03.  Call of Meetings by Company or Securityholders.
                         ----------------------------------------------

          In case at any time the Company pursuant to a Board Resolution, or the
holders of at least 10% in aggregate principal amount of the Debt Securities, as
the case may be, then outstanding, shall have requested the Trustee to call a
meeting of Securityholders, by written request setting forth in reasonable
detail the action proposed to be taken at the meeting, and the Trustee shall not
have mailed the notice of such meeting within 20 days after receipt of such
request, then the Company or such Securityholders may determine the time and the
place in Palo Alto, Menlo Park or San Francisco for such meeting and may call
such meeting to take any action authorized in Section 8.01, by mailing notice
thereof as provided in Section 8.02.

                                       40
<PAGE>

          SECTION 8.04.  Qualifications for Voting.
                         -------------------------

          To be entitled to vote at any meeting of Securityholders a Person
shall (a) be a holder of one or more Debt Securities with respect to which the
meeting is being held or (b) a Person appointed by an instrument in writing as
proxy by a holder of one or more such Debt Securities.  The only Persons who
shall be entitled to be present or to speak at any meeting of Securityholders
shall be the Persons entitled to vote at such meeting and their counsel and any
representatives of the Trustee and its counsel and any representatives of the
Company and its counsel.

          SECTION 8.05.  Regulations.
                         -----------

          Notwithstanding any other provisions of this Indenture, the Trustee
may make such reasonable regulations as it may deem advisable for any meeting of
Securityholders, in regard to proof of the holding of Debt Securities and of the
appointment of proxies, and in regard to the appointment and duties of
inspectors of votes, the submission and examination of proxies, certificates and
other evidence of the right to vote, and such other matters concerning the
conduct of the meeting as it shall think fit.

          The Trustee shall, by an instrument in writing, appoint a temporary
chairman of the meeting, unless the meeting shall have been called by the
Company or by Securityholders as provided in Section 8.03, in which case the
Company or the Securityholders calling the meeting, as the case may be, shall in
like manner appoint a temporary chairman. A permanent chairman and a permanent
secretary of the meeting shall be elected by majority vote of the meeting.

          Subject to the provisions of Section 7.04, at any meeting each holder
of Debt Securities with respect to which such meeting is being held or proxy
therefor shall be entitled to one vote for each $1,000 principal amount of Debt
Securities held or represented by him; provided, however, that no vote shall be
                                       --------  -------
cast or counted at any meeting in respect of any Debt Security challenged as not
outstanding and ruled by the chairman of the meeting to be not outstanding.  The
chairman of the meeting shall have no right to vote other than by virtue of Debt
Securities held by him or instruments in writing as aforesaid duly designating
him as the Person to vote on behalf of other Securityholders.  Any meeting of
Securityholders duly called pursuant to the provisions of Section 8.02 or 8.03
may be adjourned from time to time by a majority of those present, whether or
not constituting a quorum, and the meeting may be held as so adjourned without
further notice.

          SECTION 8.06.  Voting.
                         ------

          The vote upon any resolution submitted to any meeting of holders of
Debt Securities with respect to which such meeting is being held shall be by
written ballots on which shall be subscribed the signatures of such holders or
of their representatives by proxy and the serial number or numbers of the Debt
Securities held or represented by them.  The permanent chairman of the meeting
shall appoint two inspectors of votes who shall count all votes cast at the
meeting for or against any resolution and who shall make and file with the
secretary of the meeting their verified written reports in triplicate of all
votes cast at the meeting. A record in duplicate of the proceedings of each
meeting of Securityholders shall be prepared by the

                                       41
<PAGE>

secretary of the meeting and there shall be attached to said record the original
reports of the inspectors of votes on any vote by ballot taken thereat and
affidavits by one or more Persons having knowledge of the facts setting forth a
copy of the notice of the meeting and showing that said notice was mailed as
provided in Section 8.02. The record shall show the serial numbers of the Debt
Securities voting in favor of or against any resolution. The record shall be
signed and verified by the affidavits of the permanent chairman and secretary of
the meeting and one of the duplicates shall be delivered to the Company and the
other to the Trustee to be preserved by the Trustee, the latter to have attached
thereto the ballots voted at the meeting.

          Any record so signed and verified shall be conclusive evidence of the
matters therein stated.

          SECTION 8.07.  Quorum; Actions.
                         ---------------

          The Persons entitled to vote a majority in principal amount of the
Debt Securities shall constitute a quorum for a meeting of Securityholders;
provided, however, that if any action is to be taken at such meeting with
--------  -------
respect to a consent, waiver, request, demand, notice, authorization, direction
or other action which may be given by the holders of not less than a specified
percentage in principal amount of the Debt Securities, the Persons holding or
representing such specified percentage in principal amount of the Debt
Securities will constitute a quorum.  In the absence of a quorum within 30
minutes of the time appointed for any such meeting, the meeting shall, if
convened at the request of Securityholders, be dissolved.  In any other case the
meeting may be adjourned for a period of not less than 10 days as determined by
the permanent chairman of the meeting prior to the adjournment of such meeting.
In the absence of a quorum at any such adjourned meeting, such adjourned meeting
may be further adjourned for a period of not less than 10 days as determined by
the permanent chairman of the meeting prior to the adjournment of such adjourned
meeting.  Notice of the reconvening of any adjourned meeting shall be given as
provided in Section 8.02, except that such notice need be given only once not
less than five days prior to the date on which the meeting is scheduled to be
reconvened.  Notice of the reconvening of an adjourned meeting shall state
expressly the percentage, as provided above, of the principal amount of the Debt
Securities which shall constitute a quorum.

          Except as limited by the proviso in the first paragraph of Section
9.02, any resolution presented to a meeting or adjourned meeting duly reconvened
at which a quorum is present as aforesaid may be adopted by the affirmative vote
of the holders of a majority in principal amount of the Debt Securities;
provided, however, that, except as limited by the proviso in the first paragraph
--------  -------
of Section 9.02, any resolution with respect to any consent, waiver, request,
demand, notice, authorization, direction or other action that this Indenture
expressly provides may be given by the holders of not less than a specified
percentage in principal amount of the Debt Securities may be adopted at a
meeting or an adjourned meeting duly reconvened and at which a quorum is present
as aforesaid only by the affirmative vote of the holders of a not less than such
specified percentage in principal amount of the Debt Securities.

          Any resolution passed or decision taken at any meeting of holders of
Debt Securities duly held in accordance with this Section shall be binding on
all the Securityholders, whether or not present or represented at the meeting.

                                       42
<PAGE>

                                  ARTICLE IX
                            SUPPLEMENTAL INDENTURES

          SECTION 9.01.  Supplemental Indentures without Consent of
                         ------------------------------------------
Securityholders.
----------------

          The Company, when authorized by a Board Resolution, and the Trustee
may from time to time and at any time enter into an indenture or indentures
supplemental hereto, without the consent of the Securityholders, for one or more
of the following purposes:

          (a) to evidence the succession of another corporation to the Company,
or successive successions, and the assumption by the successor corporation of
the covenants, agreements and obligations of the Company, pursuant to Article XI
hereof;

          (b) to add to the covenants of the Company such further covenants,
restrictions or conditions for the protection of the holders of Debt Securities
as the Board of Directors shall consider to be for the protection of the holders
of such Debt Securities, and to make the occurrence, or the occurrence and
continuance, of a default in any of such additional covenants, restrictions or
conditions a default or an Event of Default permitting the enforcement of all or
any of the several remedies provided in this Indenture as herein set forth;
provided, however, that in respect of any such additional covenant, restriction
--------  -------
or condition such supplemental indenture may provide for a particular period of
grace after default (which period may be shorter or longer than that allowed in
the case of other defaults) or may provide for an immediate enforcement upon
such default or may limit the remedies available to the Trustee upon such
default;

          (c) to cure any ambiguity or to correct or supplement any provision
contained herein or in any supplemental indenture which may be defective or
inconsistent with any other provision contained herein or in any supplemental
indenture, or to make such other provisions in regard to matters or questions
arising under this Indenture; provided, that any such action shall not adversely
                              --------
affect the interests of the holders of the Debt Securities;

          (d) to add to, delete from, or revise the terms of Debt Securities,
including, without limitation, any terms relating to the issuance, exchange,
registration or transfer of Debt Securities, including to provide for transfer
procedures and restrictions substantially similar to those applicable to the
Capital Securities as required by Section 2.05 (for purposes of assuring that no
registration of Debt Securities is required under the Securities Act of 1933, as
amended); provided that any such action shall not adversely affect the interests
of the holders of the Debt Securities then outstanding (it being understood, for
purposes of this proviso, that transfer restrictions on Debt Securities
substantially similar to those that were applicable to Capital Securities shall
not be deemed to adversely affect the holders of the Debt Securities);

          (e) to evidence and provide for the acceptance of appointment
hereunder by a successor Trustee with respect to the Debt Securities and to add
to or change any of the provisions of this Indenture as shall be necessary to
provide for or facilitate the administration of the trusts hereunder by more
than one Trustee, pursuant to the requirements of Section 6.10;

                                       43
<PAGE>

          (f) to make any change (other than as elsewhere provided in this
paragraph) that does not adversely affect the rights of any Securityholder in
any material respect; or

          (g) to provide for the issuance of and establish the form and terms
and conditions of the Debt Securities, to establish the form of any
certifications required to be furnished pursuant to the terms of this Indenture
or the Debt Securities, or to add to the rights of the holders of Debt
Securities.

          The Trustee is hereby authorized to join with the Company in the
execution of any such supplemental indenture, to make any further appropriate
agreements and stipulations which may be therein contained and to accept the
conveyance, transfer and assignment of any property thereunder, but the Trustee
shall not be obligated to, but may in its discretion, enter into any such
supplemental indenture which affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

          Any supplemental indenture authorized by the provisions of this
Section 9.01 may be executed by the Company and the Trustee without the consent
of the holders of any of the Debt Securities at the time outstanding,
notwithstanding any of the provisions of Section 9.02.

          SECTION 9.02.  Supplemental Indentures with Consent of
                         ---------------------------------------
Securityholders.
---------------

          With the consent (evidenced as provided in Section 7.01) of the
holders of not less than a majority in aggregate principal amount of the Debt
Securities at the time outstanding affected by such supplemental indenture
(voting as a class), the Company, when authorized by a Board Resolution, and the
Trustee may from time to time and at any time enter into an indenture or
indentures supplemental hereto (which shall conform to the provisions of the
Trust Indenture Act, then in effect, applicable to indentures qualified
thereunder) for the purpose of adding any provisions to or changing in any
manner or eliminating any of the provisions of this Indenture or of any
supplemental indenture or of modifying in any manner the rights of the holders
of the Debt Securities; provided, however, that no such supplemental indenture
                        --------  -------
shall without the consent of the holders of each Debt Security then outstanding
and affected thereby (i) extend the fixed maturity of any Debt Security, or
reduce the principal amount thereof or any premium thereon, or reduce the rate
or extend the time of payment of interest thereon, or reduce any amount payable
on redemption thereof or make the principal thereof or any interest or premium
thereon payable in any coin or currency other than that provided in the Debt
Securities, or impair or affect the right of any Securityholder to institute
suit for payment thereof or impair the right of repayment, if any, at the option
of the holder, or (ii) reduce the aforesaid percentage of Debt Securities the
holders of which are required to consent to any such supplemental indenture; and
provided, further, that if the Debt Securities are held by the Trust or a
--------  -------
trustee of such trust, such supplemental indenture shall not be effective until
the holders of a majority in liquidation preference of Trust Securities shall
have consented to such supplemental indenture; provided further, that if the
                                               -------- -------
consent of the Securityholder of each outstanding Debt Security is required,
such supplemental indenture shall not be effective until each holder of the
Trust Securities shall have consented to such supplemental indenture.

                                       44
<PAGE>

          Upon the request of the Company accompanied by a Board Resolution
authorizing the execution of any such supplemental indenture, and upon the
filing with the Trustee of evidence of the consent of Securityholders as
aforesaid, the Trustee shall join with the Company in the execution of such
supplemental indenture unless such supplemental indenture affects the Trustee's
own rights, duties or immunities under this Indenture or otherwise, in which
case the Trustee may in its discretion, but shall not be obligated to, enter
into such supplemental indenture.

          Promptly after the execution by the Company and the Trustee of any
supplemental indenture pursuant to the provisions of this Section, the Trustee
shall transmit by mail, first class postage prepaid, a notice, prepared by the
Company, setting forth in general terms the substance of such supplemental
indenture, to the Securityholders thereby as their names and addresses appear
upon the Debt Security Register.  Any failure of the Trustee to mail such
notice, or any defect therein, shall not, however, in any way impair or affect
the validity of any such supplemental indenture.

          It shall not be necessary for the consent of the Securityholders under
this Section 9.02 to approve the particular form of any proposed supplemental
indenture, but it shall be sufficient if such consent shall approve the
substance thereof.

          SECTION 9.03.  Effect of Supplemental Indentures.
                         ---------------------------------

          Upon the execution of any supplemental indenture pursuant to the
provisions of this Article IX, this Indenture shall be and be deemed to be
modified and amended in accordance therewith and the respective rights,
limitations of rights, obligations, duties and immunities under this Indenture
of the Trustee, the Company and the holders of Debt Securities shall thereafter
be determined, exercised and enforced hereunder subject in all respects to such
modifications and amendments and all the terms and conditions of any such
supplemental indenture shall be and be deemed to be part of the terms and
conditions of this Indenture for any and all purposes.

          SECTION 9.04.  Notation on Debt Securities.
                         ---------------------------

          Debt Securities authenticated and delivered after the execution of any
supplemental indenture pursuant to the provisions of this Article IX may bear a
notation as to any matter provided for in such supplemental indenture.  If the
Company or the Trustee shall so determine, new Debt Securities so modified as to
conform, in the opinion of the Board of Directors of the Company, to any
modification of this Indenture contained in any such supplemental indenture may
be prepared and executed by the Company, authenticated by the Trustee or the
Authenticating Agent and delivered in exchange for the Debt Securities then
outstanding.

          SECTION 9.05.  Evidence of Compliance of Supplemental Indenture to be
                         ------------------------------------------------------
Furnished to Trustee.
--------------------

          The Trustee, subject to the provisions of Sections 6.01 and 6.02,
shall, in addition to the documents required by Section 14.06, receive an
Officers' Certificate and an Opinion of Counsel as conclusive evidence that any
supplemental indenture executed pursuant hereto complies with the requirements
of this Article IX. The Trustee shall receive an Opinion of

                                       45
<PAGE>

Counsel as conclusive evidence that any supplemental indenture executed pursuant
to this Article IX is authorized or permitted by, and conforms to, the terms of
this Article IX and that it is proper for the Trustee under the provisions of
this Article IX to join in the execution thereof.

                                   ARTICLE X
                           REDEMPTION OF SECURITIES

          SECTION 10.01.  Optional Redemption.
                          -------------------

          At any time the Company shall have the right, subject to the receipt
by the Company of prior approval from the Federal Reserve, if then required
under applicable capital guidelines or policies of the Federal Reserve, to
redeem the Debt Securities, in whole or in part, on any March 8 or September 8
on or after March 8, 2010 (the "Redemption Date"), at the Redemption Price.

          SECTION 10.02.  Special Event Redemption.
                          ------------------------

          If a Special Event shall occur and be continuing, the Company shall
have the right, subject to the receipt by the Company of prior approval from the
Federal Reserve if then required under applicable capital guidelines or policies
of the Federal Reserve, to redeem the Debt Securities, in whole but not in part,
at any time within 90 days following the occurrence of such Special Event (the
"Special Redemption Date"), at the Special Redemption Price.

          SECTION 10.03.  Notice of Redemption; Selection of Debt Securities.
                          --------------------------------------------------

          In case the Company shall desire to exercise the right to redeem all,
or, as the case may be, any part of the Debt Securities, it shall fix a date for
redemption and shall mail a notice of such redemption at least 30 and not more
than 60 days prior to the date fixed for redemption to the holders of Debt
Securities so to be redeemed as a whole or in part at their last addresses as
the same appear on the Debt Security Register.  Such mailing shall be by first
class mail.  The notice if mailed in the manner herein provided shall be
conclusively presumed to have been duly given, whether or not the holder
receives such notice.  In any case, failure to give such notice by mail or any
defect in the notice to the holder of any Debt Security designated for
redemption as a whole or in part shall not affect the validity of the
proceedings for the redemption of any other Debt Security.

          Each such notice of redemption shall specify the date fixed for
redemption, the redemption price at which Debt Securities are to be redeemed,
the place or places of payment, that payment will be made upon presentation and
surrender of such Debt Securities, that interest accrued to the date fixed for
redemption will be paid as specified in said notice, and that on and after said
date interest thereon or on the portions thereof to be redeemed will cease to
accrue. If less than all the Debt Securities are to be redeemed the notice of
redemption shall specify the numbers of the Debt Securities to be redeemed.  In
case the Debt Securities are to be redeemed in part only, the notice of
redemption shall state the portion of the principal amount thereof to be
redeemed and shall state that on and after the date fixed for redemption, upon
surrender of such Debt Security, a new Debt Security or Debt Securities in
principal amount equal to the unredeemed portion thereof will be issued.

                                       46
<PAGE>

          Prior to 10:00 a.m. on the Redemption Date or the Special Redemption
Date specified in the notice of redemption given as provided in this Section,
the Company will deposit with the Trustee or with one or more paying agents an
amount of money sufficient to redeem on the redemption date all the Debt
Securities so called for redemption at the appropriate redemption price,
together with accrued interest to the date fixed for redemption.

          The Company will give the Trustee notice not less than 45 nor more
than 60 days prior to the redemption date as to the aggregate principal amount
of Debt Securities to be redeemed and the Trustee shall select, in such manner
as in its sole discretion it shall deem appropriate and fair, the Debt
Securities or portions thereof (in integral multiples of $1,000) to be redeemed.
In the case of a redemption pursuant to Section 10.02 above, the Trustee shall,
promptly upon receipt of the Treasury Rate from the Quotation Agent, provide the
Treasury Rate to Chase Bank of Texas, National Association, on behalf of the
holders of the Capital Securities.

          SECTION 10.04.  Payment of Debt Securities Called for Redemption.
                          ------------------------------------------------

          If notice of redemption has been given as provided in Section 10.03,
the Debt Securities or portions of Debt Securities with respect to which such
notice has been given shall become due and payable on the Redemption Date or the
Special Redemption Date, as the case may be, and at the place or places stated
in such notice at the applicable redemption price, together with interest
accrued to the date fixed for redemption, and on and after said Redemption Date
or Special Redemption Date (unless the Company shall default in the payment of
such Debt Securities at the redemption price, together with interest accrued to
said date) interest on the Debt Securities or portions of Debt Securities so
called for redemption shall cease to accrue. On presentation and surrender of
such Debt Securities at a place of payment specified in said notice, such Debt
Securities or the specified portions thereof shall be paid and redeemed by the
Company at the applicable redemption price, together with interest accrued
thereon to the Redemption Date or the Special Redemption Date, as the case may
be.

          Upon presentation of any Debt Security redeemed in part only, the
Company shall execute and the Trustee shall authenticate and make available for
delivery to the holder thereof, at the expense of the Company, a new Debt
Security or Debt Securities of authorized denominations in principal amount
equal to the unredeemed portion of the Debt Security so presented.

                                  ARTICLE XI
               CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE

          SECTION 11.01.  Company May Consolidate, etc., on Certain Terms.
                          -----------------------------------------------

          Nothing contained in this Indenture or in the Debt Securities shall
prevent any consolidation or merger of the Company with or into any other Person
(whether or not affiliated with the Company) or successive consolidations or
mergers in which the Company or its successor or successors shall be a party or
parties, or shall prevent any sale, conveyance, transfer, lease or other
disposition of the property of the Company or its successor or successors as an
entirety, or substantially as an entirety, to any other Person (whether or not
affiliated with the Company, or its successor or successors) authorized to
acquire and operate the same; provided,
                              --------

                                       47
<PAGE>

however, that the Company hereby covenants and agrees that, upon any such
-------
consolidation, merger (where the Company is not the surviving corporation),
sale, conveyance, transfer, lease or other disposition, the due and punctual
payment of the principal of (and premium, if any) and interest on all of the
Debt Securities in accordance with their terms, according to their tenor, and
the due and punctual performance and observance of all the covenants and
conditions of this Indenture to be kept or performed by the Company, shall be
expressly assumed by the surviving Person by supplemental indenture satisfactory
in form to the Trustee executed and delivered to the Trustee by the entity
formed by such consolidation, or into which the Company shall have been merged,
or by the entity which shall have acquired such property and provided that after
giving effect to such sale, conveyance, transfer, lease, no Default or Event of
Default shall have occurred and be continuing.

          SECTION 11.02.  Successor Entity to be Substituted.
                          ----------------------------------

          In case of any such consolidation, merger, sale, conveyance, transfer
or other disposition and upon the assumption by the successor entity, by
supplemental indenture, executed and delivered to the Trustee and satisfactory
in form to the Trustee, of the due and punctual payment of the principal of and
premium, if any, and interest on all of the Debt Securities and the due and
punctual performance and observance of all of the covenants and conditions of
this Indenture to be performed or observed by the Company, such successor entity
shall succeed to and be substituted for the Company, with the same effect as if
it had been named herein as the Company, and thereupon the predecessor entity
shall be relieved of any further liability or obligation hereunder or upon the
Debt Securities.  Such successor entity thereupon may cause to be signed, and
may issue either in its own name or in the name of the Company, any or all of
the Debt Securities issuable hereunder which theretofore shall not have been
signed by the Company and delivered to the Trustee or the Authenticating Agent;
and, upon the order of such successor entity instead of the Company and subject
to all the terms, conditions and limitations in this Indenture prescribed, the
Trustee or the Authenticating Agent shall authenticate and deliver any Debt
Securities which previously shall have been signed and delivered by the officers
of the Company, to the Trustee or the Authenticating Agent for authentication,
and any Debt Securities which such successor entity thereafter shall cause to be
signed and delivered to the Trustee or the Authenticating Agent for that
purpose.  All the Debt Securities so issued shall in all respects have the same
legal rank and benefit under this Indenture as the Debt Securities theretofore
or thereafter issued in accordance with the terms of this Indenture as though
all of such Debt Securities had been issued at the date of the execution hereof.

          SECTION 11.03.  Opinion of Counsel to be Given to Trustee.
                          -----------------------------------------

          The Trustee, subject to the provisions of Sections 6.01 and 6.02,
shall receive, in addition to the Opinion of Counsel required by Section 9.05,
an Opinion of Counsel as conclusive evidence that any consolidation, merger,
sale, conveyance,  transfer or other disposition, and any assumption, permitted
or required by the terms of this Article XI complies with the provisions of this
Article XI.

                                       48
<PAGE>

                                  ARTICLE XII
                    SATISFACTION AND DISCHARGE OF INDENTURE

          SECTION 12.01.  Discharge of Indenture.
                          ----------------------

          When (a) the Company shall deliver to the Trustee for cancellation all
Debt Securities theretofore authenticated (other than any Debt Securities which
shall have been destroyed, lost or stolen and which shall have been replaced or
paid as provided in Section 2.06) and not theretofore canceled, or (b) all the
Debt Securities not theretofore canceled or delivered to the Trustee for
cancellation shall have become due and payable, or are by their terms to become
due and payable within one year or are to be called for redemption within one
year under arrangements satisfactory to the Trustee for the giving of notice of
redemption, and the Company shall deposit with the Trustee, in trust, funds,
which shall be immediately due and payable, sufficient to pay at maturity or
upon redemption all of the Debt Securities (other than any Debt Securities which
shall have been destroyed, lost or stolen and which shall have been replaced or
paid as provided in Section 2.06) not theretofore canceled or delivered to the
Trustee for cancellation, including principal and premium, if any, and interest
due or to become due to such date of maturity or redemption date, as the case
may be, but excluding, however, the amount of any moneys for the payment of
principal of, and premium, if any, or interest on the Debt Securities (1)
theretofore repaid to the Company in accordance with the provisions of Section
12.04, or (2) paid to any state or to the District of Columbia pursuant to its
unclaimed property or similar laws, and if in the case of either clause (a) or
clause (b) the Company shall also pay or cause to be paid all other sums payable
hereunder by the Company, then this Indenture shall cease to be of further
effect except for the provisions of Sections 2.05, 2.06, 2.08, 3.01, 3.02, 3.04,
6.06, 6.09 and 12.04 hereof shall survive until such Debt Securities shall
mature and be paid.  Thereafter, Sections 6.09 and 12.04 shall survive, and the
Trustee, on demand of the Company accompanied by an Officers' Certificate and an
Opinion of Counsel, each stating that all conditions precedent herein provided
for relating to the satisfaction and discharge of this Indenture have been
complied with, and at the cost and expense of the Company, shall execute proper
instruments acknowledging satisfaction of and discharging this Indenture, the
Company, however, hereby agreeing to reimburse the Trustee for any costs or
expenses thereafter reasonably and properly incurred by the Trustee in
connection with this Indenture or the Debt Securities.

          SECTION 12.02.  Deposited Moneys to be Held in Trust by Trustee.
                          -----------------------------------------------

          Subject to the provisions of Section 12.04, all moneys deposited with
the Trustee pursuant to Section 12.01 shall be held in trust and applied by it
to the payment, either directly or through any paying agent (including the
Company if acting as its own paying agent), to the holders of the particular
Debt Securities for the payment of which such moneys have been deposited with
the Trustee, of all sums due and to become due thereon for principal, and
premium, if any, and interest.

          SECTION 12.03.  Paying Agent to Repay Moneys Held.
                          ---------------------------------

          Upon the satisfaction and discharge of this Indenture all moneys then
held by any paying agent of the Debt Securities (other than the Trustee) shall,
upon demand of the Company,

                                       49
<PAGE>

be repaid to it or paid to the Trustee, and thereupon such paying agent shall be
released from all further liability with respect to such moneys.

          SECTION 12.04.  Return of Unclaimed Moneys.
                          --------------------------

          Any moneys deposited with or paid to the Trustee or any paying agent
for payment of the principal of, and premium, if any, or interest on Debt
Securities and not applied but remaining unclaimed by the holders of Debt
Securities for two years after the date upon which the principal of, and
premium, if any, or interest on such Debt Securities, as the case may be, shall
have become due and payable, shall be repaid to the Company by the Trustee or
such paying agent on written demand; and the holder of any of the Debt
Securities shall thereafter look only to the Company for any payment which such
holder may be entitled to collect and all liability of the Trustee or such
paying agent with respect to such moneys shall thereupon cease.

                                 ARTICLE XIII
                   IMMUNITY OF INCORPORATORS, STOCKHOLDERS,
                            OFFICERS AND DIRECTORS

          SECTION 13.01.  Indenture and Debt Securities Solely Corporate
                          ----------------------------------------------
Obligations.
-----------

          No recourse for the payment of the principal of or premium, if any, or
interest on any Debt Security, or for any claim based thereon or otherwise in
respect thereof, and no recourse under or upon any obligation, covenant or
agreement of the Company in this Indenture or in any supplemental indenture, or
in any such Debt Security, or because of the creation of any indebtedness
represented thereby, shall be had against any incorporator, stockholder, officer
or director, as such, past, present or future, of the Company or of any
successor corporation of the Company, either directly or through the Company or
any successor corporation of the Company, whether by virtue of any constitution,
statute or rule of law, or by the enforcement of any assessment or penalty or
otherwise; it being expressly understood that all such liability is hereby
expressly waived and released as a condition of, and as a consideration for, the
execution of this Indenture and the issue of the Debt Securities.

                                  ARTICLE XIV
                           MISCELLANEOUS PROVISIONS

          SECTION 14.01.  Successors.
                          ----------

          All the covenants, stipulations, promises and agreements in this
Indenture contained by the Company shall bind its successors and assigns whether
so expressed or not.

          SECTION 14.02.  Official Acts by Successor Entity.
                          ---------------------------------

          Any act or proceeding by any provision of this Indenture authorized or
required to be done or performed by any board, committee or officer of the
Company shall and may be done

                                       50
<PAGE>

and performed with like force and effect by the like board, committee, officer
or other authorized Person of any entity that shall at the time be the lawful
successor of the Company.

          SECTION 14.03.  Surrender of Company Powers.
                          ---------------------------

          The Company by instrument in writing executed by authority of 2/3
(two-thirds) of its Board of Directors and delivered to the Trustee may
surrender any of the powers reserved to the Company and thereupon such power so
surrendered shall terminate both as to the Company, and as to any permitted
successor.

          SECTION 14.04.  Addresses for Notices, etc.
                          --------------------------

          Any notice or demand which by any provision of this Indenture is
required or permitted to be given or served by the Trustee or by the
Securityholders on the Company may be given or served in writing by being
deposited postage prepaid by registered or certified mail in a post office
letter box addressed (until another address is filed by the Company, with the
Trustee for the purpose) to the Company at 400 Emerson Street, Third Floor, Palo
Alto, California 94301, Attention:  Linda M. Iannone.

          Any notice, direction, request or demand by any Securityholder or the
Company to or upon the Trustee shall be deemed to have been sufficiently given
or made, for all purposes, if given or made in writing at the office of the
Trustee, addressed to the Trustee, 101 Barclay Street, Floor 21W, New York, NY
10286 Attention: Corporate Trust Administration.

          SECTION 14.05.  Governing Law.
                          -------------

          This Indenture and each Debt Security shall be deemed to be a contract
made under the law of the State of New York, and for all purposes shall be
governed by and construed in accordance with the law of said State, without
regard to conflict of laws principles thereof.

          SECTION 14.06.  Evidence of Compliance with Conditions Precedent.
                          ------------------------------------------------

          Upon any application or demand by the Company to the Trustee to take
any action under any of the provisions of this Indenture, the Company shall
furnish to the Trustee an Officers' Certificate stating that in the opinion of
the signers all conditions precedent, if any, provided for in this Indenture
relating to the proposed action have been complied with and an Opinion of
Counsel stating that, in the opinion of such counsel, all such conditions
precedent have been complied with.

          Each certificate or opinion provided for in this Indenture and
delivered to the Trustee with respect to compliance with a condition or covenant
provided for in this Indenture shall include (a) a statement that the person
making such certificate or opinion has read such covenant or condition; (b) a
brief statement as to the nature and scope of the examination or investigation
upon which the statements or opinions contained in such certificate or opinion
are based; (c) a statement that, in the opinion of such person, he has made such
examination or investigation as is necessary to enable him to express an
informed opinion as to whether or not

                                       51
<PAGE>

such covenant or condition has been complied with; and (d) a statement as to
whether or not, in the opinion of such person, such condition or covenant has
been complied with.

          SECTION 14.07.  Non-Business Days.
                          -----------------

          In any case where the date of payment of interest on or principal of
the Debt Securities will be a Saturday, Sunday or a day on which banking
institutions in New York City (in the State of New York) are permitted or
required by any applicable law to close, the payment of such interest on or
principal of the Debt Securities need not be made on such date but may be made
on the next succeeding day not a Saturday, Sunday or a day on which banking
institutions in such cities are permitted or required by any applicable law to
close, with the same force and effect as if made on the date of payment and no
interest shall accrue for the period from and after such date.

          SECTION 14.08.  Table of Contents, Headings, etc.
                          --------------------------------

          The table of contents and the titles and headings of the articles and
sections of this Indenture have been inserted for convenience of reference only,
are not to be considered a part hereof, and shall in no way modify or restrict
any of the terms or provisions hereof.

          SECTION 14.09.  Execution in Counterparts.
                          -------------------------

          This Indenture may be executed in any number of counterparts, each of
which shall be an original, but such counterparts shall together constitute but
one and the same instrument.

          SECTION 14.10.  Separability.
                          ------------

          In case any one or more of the provisions contained in this Indenture
or in the Debt Securities shall for any reason be held to be invalid, illegal or
unenforceable in any respect, such invalidity, illegality or unenforceability
shall not affect any other provisions of this Indenture or of such Debt
Securities, but this Indenture and such Debt Securities shall be construed as if
such invalid or illegal or unenforceable provision had never been contained
herein or therein.

          SECTION 14.11.  Assignment.
                          ----------

          The Company will have the right at all times to assign any of its
rights or obligations under this Indenture to a direct or indirect wholly owned
Subsidiary of the Company, provided that, in the event of any such assignment,
the Company will remain liable for all such obligations. Subject to the
foregoing, this Indenture is binding upon and inures to the benefit of the
parties hereto and their respective successors and assigns. This Indenture may
not otherwise be assigned by the parties thereto.

          SECTION 14.12.  Acknowledgment of Rights.
                          ------------------------

          The Company acknowledges that, with respect to any Debt Securities
held by the Trust or the Institutional Trustee of the Trust, if the
Institutional Trustee of the Trust fails to

                                       52
<PAGE>

enforce its rights under this Indenture as the holder of Debt Securities held as
the assets of the Trust after the holders of a majority in liquidation amount of
the Capital Securities of the Trust have so directed such Institutional Trustee,
a holder of record of such Capital Securities may to the fullest extent
permitted by law institute legal proceedings directly against the Company to
enforce such Institutional Trustee's rights under this Indenture without first
instituting any legal proceedings against such Institutional Trustee or any
other Person. Notwithstanding the foregoing, if an Event of Default has occurred
and is continuing and such event is attributable to the failure of the Company
to pay interest (or premium, if any) or principal on the Debt Securities on the
date such interest (or premium, if any) or principal is otherwise payable (or in
the case of redemption, on the redemption date), the Company acknowledges that a
holder of record of Capital Securities of the Trust may directly institute a
proceeding against the Company for enforcement of payment to such holder
directly of the principal of (or premium, if any) or interest on the of Debt
Securities having an aggregate principal amount equal to the aggregate
liquidation amount of the Capital Securities of such holder on or after the
respective due date specified in the Debt Securities.

                                  ARTICLE XV
                       SUBORDINATION OF DEBT SECURITIES

          SECTION 15.01.  Agreement to Subordinate.
                          ------------------------

          The Company covenants and agrees, and each holder of Debt Securities
issued hereunder and under any supplemental indenture or by any Board Resolution
(the "Additional Provisions") by such Securityholder's acceptance thereof
likewise covenants and agrees, that all Debt Securities shall be issued subject
to the provisions of this Article XV; and each holder of a Debt Security,
whether upon original issue or upon transfer or assignment thereof, accepts and
agrees to be bound by such provisions.

          The payment by the Company of the principal of, and premium, if any,
and interest on all Debt Securities issued hereunder and under any Additional
Provisions shall, to the extent and in the manner hereinafter set forth, be
subordinated and junior in right of payment to the prior payment in full of all
Allocable Amounts payable in respect of Senior Indebtedness of the Company,
whether outstanding at the date of this Indenture or thereafter incurred.

          No provision of this Article XV shall prevent the occurrence of any
Default or Event of Default hereunder.

          SECTION 15.02.  Default on Senior Indebtedness.
                          ------------------------------

          In the event and during the continuation of any default by the Company
in the payment of principal, premium, interest or any other payment due on any
Senior Indebtedness of the Company following any grace period, or in the event
that the maturity of any Senior Indebtedness of the Company has been accelerated
because of a default, then, in either case, no payment shall be made by the
Company with respect to the principal (including redemption and sinking fund
payments) of, or premium, if any, or interest on the Debt Securities.

                                       53
<PAGE>

          In the event of the acceleration of the maturity of the Debt
Securities, then no payment shall be made by the Company with respect to the
principal (including prepayment payments) of (or premium, if any) or interest on
the Debt Securities until the holders of all Senior Indebtedness outstanding at
the time of such acceleration shall receive payment, in full, of all Allocable
Amounts due on or in respect of such Senior Indebtedness (including any amounts
due upon acceleration).

          In the event that, notwithstanding the foregoing, any payment shall be
received by the Trustee when such payment is prohibited by the preceding
paragraph of this Section 15.02, such payment shall, subject to Section 15.06,
be held in trust for the benefit of, and shall be paid over or delivered to, the
holders of Senior Indebtedness or their respective representatives, or to the
trustee or trustees under any indenture pursuant to which any of such Senior
Indebtedness may have been issued, as their respective interests may appear, but
only to the extent of the Allocable Amounts in respect of such Senior
Indebtedness and to the extent that the holders of the Senior Indebtedness (or
their representative or representatives or a trustee) notify the Trustee in
writing within 90 days of such payment of the Allocable Amounts then due and
owing on the Senior Indebtedness and only the Allocable Amounts specified in
such notice to the Trustee shall be paid to the holders of Senior Indebtedness.

          SECTION 15.03.  Liquidation; Dissolution; Bankruptcy.
                          ------------------------------------

          Upon any payment by the Company or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, to
creditors upon any dissolution or winding-up or liquidation or reorganization of
the Company, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership or other proceedings, all Allocable Amounts due upon all Senior
Indebtedness of the Company shall first be paid in full, or payment thereof
provided for in money in accordance with its terms, before any payment is made
by the Company, on account of the principal (and premium, if any) or interest on
the Debt Securities; and upon any such dissolution or winding-up or liquidation
or reorganization, any payment by the Company, or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, to
which the Securityholders or the Trustee would be entitled to receive from the
Company, except for the provisions of this Article XV, shall be paid by the
Company, or by any receiver, trustee in bankruptcy, liquidating trustee, agent
or other Person making such payment or distribution, or by the Securityholders
or by the Trustee under this Indenture if received by them or it, directly to
the holders of Allocable Amounts of the Company (pro rata to such holders on the
basis of the respective Allocable Amounts of Senior Indebtedness held by such
holders, as calculated by the Company) or their representative or
representatives, or to the trustee or trustees under any indenture pursuant to
which any instruments evidencing such Allocable Amounts may have been issued, as
their respective interests may appear, to the extent necessary to pay such
Allocable Amounts in full, in money or money's worth, after giving effect to any
concurrent payment or distribution to or for the holders of such Allocable
Amounts, before any payment or distribution is made to the Securityholders or to
the Trustee.

          In the event that, notwithstanding the foregoing, any payment or
distribution of assets of the Company of any kind or character, whether in cash,
property or securities, prohibited by the foregoing, shall be received by the
Trustee before all Allocable Amounts of Senior Indebtedness of the Company is
paid in full, or provision is made for such payment in

                                       54
<PAGE>

money in accordance with its terms, such payment or distribution shall (subject
to Section 15.06) be held in trust for the benefit of and shall be paid over or
delivered to the holders of such Allocable Amounts of Senior Indebtedness or
their representative or representatives, or to the trustee or trustees under any
indenture pursuant to which any instruments evidencing such Allocable Amounts of
Senior Indebtedness may have been issued, as their respective interests may
appear, as calculated by the Company, for application to the payment of all
Senior Indebtedness of the Company, remaining unpaid to the extent necessary to
pay such Allocable Amounts of Senior Indebtedness in full in money in accordance
with its terms, after giving effect to any concurrent payment or distribution to
or for the benefit of the holders of such Senior Indebtedness.

          For purposes of this Article XV, the words "cash, property or
securities" shall not be deemed to include shares of stock of the Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan of reorganization or readjustment, the payment of which
is subordinated at least to the extent provided in this Article XV with respect
to the Debt Securities to the payment of all Senior Indebtedness of the Company,
that may at the time be outstanding, provided that (a) such Senior Indebtedness
is assumed by the new corporation, if any, resulting from any such
reorganization or readjustment, and (b) the rights of the holders of such Senior
Indebtedness are not, without the consent of such holders, altered by such
reorganization or readjustment.  The consolidation of the Company with, or the
merger of the Company into, another corporation or the liquidation or
dissolution of the Company following the conveyance or transfer of its property
as an entirety, or substantially as an entirety, to another corporation upon the
terms and conditions provided for in Article IX of this Indenture shall not be
deemed a dissolution, winding-up, liquidation or reorganization for the purposes
of this Section 15.03 if such other corporation shall, as a part of such
consolidation, merger, conveyance or transfer, comply with the conditions stated
in Article IX of this Indenture.  Nothing in Section 15.02 or in this Section
15.03 shall apply to claims of, or payments to, the Trustee under or pursuant to
Section 6.06 of this Indenture.

          SECTION 15.04.  Subrogation.
                          -----------

          Subject to the payment in full of all Allocable Amounts of Senior
Indebtedness of the Company, the Securityholders shall be subrogated to the
rights of the holders of such Senior Indebtedness to receive payments or
distributions of cash, property or securities of the Company, applicable to such
Senior Indebtedness until the principal of (and premium, if any) and interest on
the Debt Securities shall be paid in full; and, for the purposes of such
subrogation, no payments or distributions to the holders of such Senior
Indebtedness of any cash, property or securities to which the Securityholders or
the Trustee would be entitled except for the provisions of this Article XV, and
no payment over pursuant to the provisions of this Article XV to or for the
benefit of the holders of such Senior Indebtedness by Securityholders or the
Trustee, shall, as between the Company, its creditors other than holders of
Senior Indebtedness of the Company, and the holders of the Debt Securities be
deemed to be a payment or distribution by the Company to or on account of such
Senior Indebtedness.  It is understood that the provisions of this Article XV
are and are intended solely for the purposes of defining the relative rights of
the holders of the Securities, on the one hand, and the holders of such Senior
Indebtedness, on the other hand.

                                       55
<PAGE>

          Nothing contained in this Article XV or elsewhere in this Indenture,
any Additional Provisions or in the Debt Securities is intended to or shall
impair, as between the Company, its creditors other than the holders of Senior
Indebtedness of the Company, and the holders of the Debt Securities, the
obligation of the Company, which is absolute and unconditional, to pay to the
holders of the Debt Securities the principal of (and premium, if any) and
interest on the Debt Securities as and when the same shall become due and
payable in accordance with their terms, or is intended to or shall affect the
relative rights of the holders of the Debt Securities and creditors of the
Company, other than the holders of Senior Indebtedness of the Company, nor shall
anything herein or therein prevent the Trustee or the holder of any Debt
Security from exercising all remedies otherwise permitted by applicable law upon
default under this Indenture, subject to the rights, if any, under this Article
XV of the holders of such Senior Indebtedness in respect of cash, property or
securities of the Company, received upon the exercise of any such remedy.

          Upon any payment or distribution of assets of the Company referred to
in this Article XV, the Trustee, subject to the provisions of Article VI of this
Indenture, and the Securityholders shall be entitled to conclusively rely upon
any order or decree made by any court of competent jurisdiction in which such
dissolution, winding-up, liquidation or reorganization proceedings are pending,
or a certificate of the receiver, trustee in bankruptcy, liquidation trustee,
agent or other Person making such payment or distribution, delivered to the
Trustee or to the Securityholders, for the purposes of ascertaining the Persons
entitled to participate in such distribution, the holders of Senior Indebtedness
and other indebtedness of the Company, the amount thereof or payable thereon,
the amount or amounts paid or distributed thereon and all other facts pertinent
thereto or to this Article XV.

          SECTION 15.05.  Trustee to Effectuate Subordination.
                          -----------------------------------

          Each Securityholder by such Securityholder's acceptance thereof
authorizes and directs the Trustee on such Securityholder's behalf to take such
action as may be necessary or appropriate to effectuate the subordination
provided in this Article XV and appoints the Trustee such Securityholder's
attorney-in-fact for any and all such purposes.

          SECTION 15.06.  Notice by the Company.
                          ---------------------

          The Company shall give prompt written notice to a Responsible Officer
of the Trustee at the Principal Office of the Trustee of any fact known to the
Company that would prohibit the making of any payment of monies to or by the
Trustee in respect of the Debt Securities pursuant to the provisions of this
Article XV.  Notwithstanding the provisions of this Article XV or any other
provision of this Indenture or any Additional Provisions, the Trustee shall not
be charged with knowledge of the existence of any facts that would prohibit the
making of any payment of monies to or by the Trustee in respect of the Debt
Securities pursuant to the provisions of this Article XV, unless and until a
Responsible Officer of the Trustee at the Principal Office of the Trustee shall
have received written notice thereof from the Company or a holder or holders of
Senior Indebtedness or from any trustee therefor; and before the receipt of any
such written notice, the Trustee, subject to the provisions of Article VI of
this Indenture, shall be entitled in all respects to assume that no such facts
exist; provided, however, that if the Trustee shall not have received the notice
       --------  -------
provided for in this Section 15.06 at least two Business

                                       56
<PAGE>

Days prior to the date upon which by the terms hereof any money may become
payable for any purpose (including, without limitation, the payment of the
principal of (or premium, if any) or interest on any Debt Security), then,
anything herein contained to the contrary notwithstanding, the Trustee shall
have full power and authority to receive such money and to apply the same to the
purposes for which they were received, and shall not be affected by any notice
to the contrary that may be received by it within two Business Days prior to
such date.

          The Trustee, subject to the provisions of Article VI of this
Indenture, shall be entitled to conclusively rely on the delivery to it of a
written notice by a Person representing himself to be a holder of Senior
Indebtedness of the Company (or a trustee or representative on behalf of such
holder), to establish that such notice has been given by a holder of such Senior
Indebtedness or a trustee or representative on behalf of any such holder or
holders.  In the event that the Trustee determines in good faith that further
evidence is required with respect to the right of any Person as a holder of such
Senior Indebtedness to participate in any payment or distribution pursuant to
this Article XV, the Trustee may request such Person to furnish evidence to the
reasonable satisfaction of the Trustee as to the amount of such Senior
Indebtedness held by such Person, the extent to which such Person is entitled to
participate in such payment or distribution and any other facts pertinent to the
rights of such Person under this Article XV, and, if such evidence is not
furnished, the Trustee may defer any payment to such Person pending judicial
determination as to the right of such Person to receive such payment.

          SECTION 15.07.  Rights of the Trustee; Holders of Senior Indebtedness.
                          -----------------------------------------------------

          The Trustee in its individual capacity shall be entitled to all the
rights set forth in this Article XV in respect of any Senior Indebtedness at any
time held by it, to the same extent as any other holder of Senior Indebtedness,
and nothing in this Indenture or any Additional Provisions shall deprive the
Trustee of any of its rights as such holder.

          With respect to the holders of Senior Indebtedness of the Company, the
Trustee undertakes to perform or to observe only such of its covenants and
obligations as are specifically set forth in this Article XV, and no implied
covenants or obligations with respect to the holders of such Senior Indebtedness
shall be read into this Indenture or any Additional Provisions against the
Trustee.  The Trustee shall not be deemed to owe any fiduciary duty to the
holders of such Senior Indebtedness and, subject to the provisions of Article VI
of this Indenture, the Trustee shall not be liable to any holder of such Senior
Indebtedness if it shall pay over or deliver to Securityholders, the Company or
any other Person money or assets to which any holder of such Senior Indebtedness
shall be entitled by virtue of this Article XV or otherwise.

          Nothing in this Article XV shall apply to claims of, or payments to,
the Trustee under or pursuant to Section 6.06.

          SECTION 15.08.  Subordination May Not Be Impaired.
                          ---------------------------------

          No right of any present or future holder of any Senior Indebtedness of
the Company to enforce subordination as herein provided shall at any time in any
way be prejudiced or impaired by any act or failure to act on the part of the
Company, or by any act or failure to act, in good faith, by any such holder, or
by any noncompliance by the Company, with the terms,

                                       57
<PAGE>

provisions and covenants of this Indenture, regardless of any knowledge thereof
that any such holder may have or otherwise be charged with.

          Without in any way limiting the generality of the foregoing paragraph,
the holders of Senior Indebtedness of the Company may, at any time and from time
to time, without the consent of or notice to the Trustee or the Securityholders,
without incurring responsibility to the Securityholders and without impairing or
releasing the subordination provided in this Article XV or the obligations
hereunder of the holders of the Debt Securities to the holders of such Senior
Indebtedness, do any one or more of the following: (a) change the manner, place
or terms of payment or extend the time of payment of, or renew or alter, such
Senior Indebtedness, or otherwise amend or supplement in any manner such Senior
Indebtedness or any instrument evidencing the same or any agreement under which
such Senior Indebtedness is outstanding; (b) sell, exchange, release or
otherwise deal with any property pledged, mortgaged or otherwise securing such
Senior Indebtedness; (c) release any Person liable in any manner for the
collection of such Senior Indebtedness; and (d) exercise or refrain from
exercising any rights against the Company, and any other Person.

          The Bank of New York hereby accepts the trusts in this Indenture
declared and provided, upon the terms and conditions herein above set forth.

                                       58
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Indenture to
be duly executed by their respective officers thereunto duly authorized, as of
the day and year first above written.

                                   GREATER BAY BANCORP

                                   By /s/ Steven C. Smith
                                   ----------------------------
                                   Name:  Steven C. Smith
                                   Title: Executive Vice President,
                                          Chief Administrative Officer and
                                          Chief Financial Officer

                                   THE BANK OF NEW YORK, as Trustee

                                   By /s/ Annette L. Kos
                                   ----------------------------
                                   Name:  Annette L. Kos
                                   Title: Assistant Vice President

                                      59<PAGE>

                                                                     Exhibit 4.5

                              GUARANTEE AGREEMENT

                              GREATER BAY BANCORP

                          Dated as of March 23, 2000
<PAGE>

                               Table of Contents

<TABLE>
<CAPTION>
                                                                               Page
<S>                                                                            <C>
                                   ARTICLE I
                        DEFINITIONS AND INTERPRETATION

SECTION 1.1  Definitions and Interpretation...................................  1

                                  ARTICLE II
                         POWERS, DUTIES AND RIGHTS OF
                               GUARANTEE TRUSTEE

SECTION 2.1  Powers and Duties of the Guarantee Trustee.......................  4
SECTION 2.2  Certain Rights of Guarantee Trustee..............................  5
SECTION 2.3  Not Responsible for Recitals or Issuance of Guarantee............  7
SECTION 2.4  Events of Default; Waiver........................................  8
SECTION 2.5  Events of Default; Notice........................................  8

                                  ARTICLE III
                               GUARANTEE TRUSTEE

SECTION 3.1  Guarantee Trustee; Eligibility...................................  8
SECTION 3.2  Appointment, Removal and Resignation of Guarantee Trustee........  9

                                  ARTICLE IV
                                   GUARANTEE

SECTION 4.1  Guarantee.......................................................  10
SECTION 4.2  Waiver of Notice and Demand.....................................  10
SECTION 4.3  Obligations Not Affected........................................  10
SECTION 4.4  Rights of Holders...............................................  11
SECTION 4.5  Guarantee of Payment............................................  11
SECTION 4.6  Subrogation.....................................................  12
SECTION 4.7  Independent Obligations.........................................  12
SECTION 4.8  Enforcement by a Beneficiary....................................  12

                                   ARTICLE V
                   LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 5.1  Limitation of Transactions......................................  12
SECTION 5.2  Ranking.........................................................  13

                                  ARTICLE VI
                                  TERMINATION

SECTION 6.1  Termination.....................................................  13

                                  ARTICLE VII
                                INDEMNIFICATION

SECTION 7.1  Exculpation.....................................................  14
SECTION 7.2  Indemnification.................................................  14
SECTION 7.3  Compensation; Reimbursement of Expenses.........................  15
</TABLE>

                                      i
<PAGE>

<TABLE>
<S>                                                                            <C>
                                 ARTICLE VIII
                                 MISCELLANEOUS

SECTION 8.1  Successors and Assigns..........................................  16
SECTION 8.2  Amendments......................................................  16
SECTION 8.3  Notices.........................................................  16
SECTION 8.4  Benefit.........................................................  17
SECTION 8.5  Governing Law...................................................  17
</TABLE>

                                      ii
<PAGE>

                              GUARANTEE AGREEMENT
                              -------------------

          This GUARANTEE AGREEMENT (the "Guarantee"), dated as of March 23,
2000, is executed and delivered by Greater Bay Bancorp, a bank holding company
incorporated in California (the "Guarantor"), and The Bank of New York, as
trustee (the "Guarantee Trustee"), for the benefit of the Holders (as defined
herein) from time to time of the Capital Securities (as defined herein) of GBB
Capital III, a Delaware statutory business trust (the "Issuer").

          WHEREAS, pursuant to an Amended and Restated Declaration of Trust (the
"Declaration"), dated as of March 23, 2000, among the trustees named therein of
the Issuer, Greater Bay Bancorp, as sponsor, and the holders from time to time
of undivided beneficial interests in the assets of the Issuer, the Issuer is
issuing on the date hereof securities, having an aggregate liquidation amount of
up to $9,500,000, designated the Fixed Rate Capital Trust Pass-through
Securities/(R)/ (the "Capital Securities");

          WHEREAS, as incentive for the Holders to purchase the Capital
Securities, the Guarantor desires irrevocably and unconditionally to agree, to
the extent set forth in this Guarantee, to pay to the Holders of Capital
Securities the Guarantee Payments (as defined herein) and to make certain other
payments on the terms and conditions set forth herein; and

          NOW, THEREFORE, in consideration of the purchase by each Holder of the
Capital Securities, which purchase the Guarantor hereby agrees shall benefit the
Guarantor, the Guarantor executes and delivers this Guarantee for the benefit of
the Holders.

                                   ARTICLE I
                        DEFINITIONS AND INTERPRETATION

SECTION 1.1  Definitions and Interpretation
             ------------------------------

          In this Guarantee, unless the context otherwise requires:

          (a)  capitalized terms used in this Guarantee but not defined in the
     preamble above have the respective meanings assigned to them in this
     Section 1.1;

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

          (c)  all references to "the Guarantee" or "this Guarantee" are to this
     Guarantee as modified, supplemented or amended from time to time;

          (d)  all references in this Guarantee to Articles and Sections are to
     Articles and Sections of this Guarantee, unless otherwise specified;

          (e)  terms defined in the Declaration as at the date of execution of
     this Guarantee have the same meanings when used in this Guarantee, unless
     otherwise defined in this Guarantee or unless the context otherwise
     requires; and

          (f)  a reference to the singular includes the plural and vice versa.
<PAGE>

          "Beneficiaries" means any Person to whom the Trust is or hereafter
becomes indebted or liable.

          "Corporate Trust Office" means the office of the Guarantee Trustee at
which the corporate trust business of the Guarantee Trustee shall, at any
particular time, be principally administered, which office at the date of
execution of this Guarantee Agreement is located at 101 Barclay Street, Floor
21W, New York, NY 10286.

          "Covered Person" means any Holder of Capital Securities.

          "Debentures" means the junior subordinated debentures of Greater Bay
Bancorp, designated the 10 7/8% Junior Subordinated Deferrable Interest
Debentures due 2030, held by the Institutional Trustee (as defined in the
Declaration) of the Issuer.

          "Declaration Event of Default" means an "Event of Default" as defined
in the Declaration.

          "Event of Default" has the meaning set forth in Section 2.4.

          "Guarantee Payments" means the following payments or distributions,
without duplication, with respect to the Capital Securities, to the extent not
paid or made by the Issuer: (i) any accrued and unpaid Distributions (as defined
in the Declaration) which are required to be paid on such Capital Securities to
the extent the Issuer shall have funds available therefor, (ii) the Redemption
Price (as defined in the Indenture) to the extent the Issuer has funds available
therefor, with respect to any Capital Securities called for redemption by the
Issuer, (iii) the Special Redemption Price (as defined in the Indenture) to the
extent the Issuer has funds available therefor, with respect to Capital
Securities redeemed upon the occurrence of a Special Event (as defined in the
Indenture), and (iv) upon a voluntary or involuntary liquidation, dissolution,
winding-up or termination of the Issuer (other than in connection with the
distribution of Debentures to the Holders of the Capital Securities in exchange
therefor as provided in the Declaration), the lesser of (a) the aggregate of the
liquidation amount and all accrued and unpaid Distributions on the Capital
Securities to the date of payment, to the extent the Issuer shall have funds
available therefor, and (b) the amount of assets of the Issuer remaining
available for distribution to Holders in liquidation of the Issuer after
satisfaction of liabilities to creditors of the Issuer as required by applicable
law (in either case, the "Liquidation Distribution").

          "Guarantee Trustee" means The Bank of New York, until a Successor
Guarantee Trustee has been appointed and has accepted such appointment pursuant
to the terms of this Guarantee and thereafter means each such Successor
Guarantee Trustee.

          "Holder" shall mean any holder, as registered on the books and records
of the Issuer, of any Capital Securities; provided, however, that, in
                                          --------  -------
determining whether the holders of the requisite percentage of Capital
Securities have given any request, notice, consent or waiver hereunder, "Holder"
shall not include the Guarantor or any Affiliate of the Guarantor.

                                       2
<PAGE>

          "Indemnified Person" means the Guarantee Trustee, any Affiliate of the
Guarantee Trustee, or any officers, directors, shareholders, members, partners,
employees, representatives, nominees, custodians or agents of the Guarantee
Trustee.

          "Indenture" means the Indenture dated as of March 23,  2000, between
the Guarantor and The Bank of New York, not in its individual capacity but
solely as trustee, and any indenture supplemental thereto pursuant to which the
Debentures are to be issued to the Institutional Trustee of the Issuer.

          "Liquidation Distribution" has the meaning set forth in the definition
of "Guarantee Payments" herein.

          "Majority in liquidation amount of the Capital Securities" means
Holder(s) of outstanding Capital Securities, voting together as a class, but
separately from the holders of Common Securities, of more than 50% of the
aggregate liquidation amount (including the stated amount that would be paid on
redemption, liquidation or otherwise, plus accrued and unpaid Distributions to
the date upon which the voting percentages are determined) of all Capital
Securities then outstanding.

          "Obligations" means any costs, expenses or liabilities (but not
including liabilities related to taxes) of the Trust, other than obligations of
the Trust to pay to holders of any Trust Securities the amounts due such holders
pursuant to the terms of the Trust Securities.

          "Officer's Certificate" means, with respect to any Person, a
certificate signed by one Authorized Officer of such Person.  Any Officer's
Certificate delivered with respect to compliance with a condition or covenant
provided for in this Guarantee shall include:

          (a)  a statement that each officer signing the Officer's 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 Officer's
     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.

          "Other Debentures" shall mean all junior subordinated debentures other
than the Debentures issued by the Company from time to time and sold to trusts
other than the Issuer (if any), in each case similar to the Issuer.

          "Other Guarantees" shall mean all guarantees other than this Guarantee
issued by the Company with respect to preferred beneficial interests (if any)
issued to trusts other than the Issuer (if any), in each case similar to the
Issuer.

                                       3
<PAGE>

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

          "Redemption Price" has the meaning set forth in the definition of
"Guarantee Payments" herein.

          "Responsible Officer" means, with respect to the Guarantee Trustee,
any officer within the Corporate Trust Office of the Guarantee Trustee,
including any Vice President, Assistant Vice President, Secretary, Assistant
Secretary or any other officer of the Guarantee Trustee customarily performing
functions similar to those performed by any of the above designated officers and
also, with respect to a particular corporate trust matter, any other officer to
whom such matter is referred because of that officer's knowledge of and
familiarity with the particular subject.

          "Successor Guarantee Trustee" means a successor Guarantee Trustee
possessing the qualifications to act as Guarantee Trustee under Section 3.1.

          "Trust Securities" means the Common Securities and the Capital
Securities.

                                  ARTICLE II
                         POWERS, DUTIES AND RIGHTS OF
                               GUARANTEE TRUSTEE

SECTION 2.1  Powers and Duties of the Guarantee Trustee
             ------------------------------------------

          (a)  This Guarantee shall be held by the Guarantee Trustee for the
     benefit of the Holders of the Capital Securities, and the Guarantee Trustee
     shall not transfer this Guarantee to any Person except a Holder of Capital
     Securities exercising his or her rights pursuant to Section 4.4(b) or to a
     Successor Guarantee Trustee on acceptance by such Successor Guarantee
     Trustee of its appointment to act as Successor Guarantee Trustee.  The
     right, title and interest of the Guarantee Trustee shall automatically vest
     in any Successor Guarantee Trustee, and such vesting and cessation of title
     shall be effective whether or not conveyancing documents have been executed
     and delivered pursuant to the appointment of such Successor Guarantee
     Trustee.

          (b)  If an Event of Default actually known to a Responsible Officer of
     the Guarantee Trustee has occurred and is continuing, the Guarantee Trustee
     shall enforce this Guarantee for the benefit of the Holders of the Capital
     Securities.

          (c)  The Guarantee Trustee, before the occurrence of any Event of
     Default and after curing all Events of Default that may have occurred,
     shall undertake to perform only such duties as are specifically set forth
     in this Guarantee, and no implied covenants shall be read into this
     Guarantee against the Guarantee Trustee.  In case an Event of Default has
     occurred (that has not been cured or waived pursuant to Section 2.4) and is
     actually known to a Responsible Officer of the Guarantee Trustee, the
     Guarantee Trustee shall exercise such of the rights and powers vested in it
     by this Guarantee, and use the same

                                       4
<PAGE>

     degree of care and skill in its exercise thereof, as a prudent person would
     exercise or use under the circumstances in the conduct of his or her own
     affairs.

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

                  (i)    prior to the occurrence of any Event of Default and
          after the curing or waiving of all such Events of Default that may
          have occurred:

                             (A)  the duties and obligations of the Guarantee
               Trustee shall be determined solely by the express provisions of
               this Guarantee, and the Guarantee Trustee shall not be liable
               except for the performance of such duties and obligations as are
               specifically set forth in this Guarantee, and no implied
               covenants or obligations shall be read into this Guarantee
               against the Guarantee Trustee; and

                            (B)  in the absence of bad faith on the part of the
               Guarantee Trustee, the Guarantee Trustee may conclusively rely,
               as to the truth of the statements and the correctness of the
               opinions expressed therein, upon any certificates or opinions
               furnished to the Guarantee Trustee and conforming to the
               requirements of this Guarantee; but in the case of any such
               certificates or opinions furnished to the Guarantee Trustee, the
               Guarantee Trustee shall be under a duty to examine the same to
               determine whether or not they conform to the requirements of this
               Guarantee;

                  (ii)   the Guarantee Trustee shall not be liable for any error
          of judgment made in good faith by a Responsible Officer of the
          Guarantee Trustee, unless it shall be proved that such Responsible
          Officer of the Guarantee Trustee or the Guarantee Trustee was
          negligent in ascertaining the pertinent facts upon which such judgment
          was made;

                  (iii)  the Guarantee 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 Capital Securities relating to
          the time, method and place of conducting any proceeding for any remedy
          available to the Guarantee Trustee, or exercising any trust or power
          conferred upon the Guarantee Trustee under this Guarantee; and

                  (iv)   no provision of this Guarantee shall require the
          Guarantee Trustee to expend or risk its own funds or otherwise incur
          personal financial liability in the performance of any of its duties
          or in the exercise of any of its rights or powers, if the Guarantee
          Trustee shall have reasonable grounds for believing that the repayment
          of such funds is not reasonably assured to it under the terms of this
          Guarantee, or security and indemnity, reasonably satisfactory to the
          Guarantee Trustee, against such risk or liability is not reasonably
          assured to it.

SECTION 2.2  Certain Rights of Guarantee Trustee
             -----------------------------------

                                       5
<PAGE>

          (a)  Subject to the provisions of Section 2.1:

                   (i)    The Guarantee Trustee may conclusively rely, and shall
          be fully protected in acting or refraining from acting upon, any
          resolution, certificate, statement, instrument, opinion, report,
          notice, request, direction, consent, order, bond, debenture, note,
          other evidence of indebtedness or other paper or document believed by
          it to be genuine and to have been signed, sent or presented by the
          proper party or parties.

                   (ii)   Any direction or act of the Guarantor contemplated by
          this Guarantee shall be sufficiently evidenced by an Officer's
          Certificate.

                   (iii)  Whenever, in the administration of this Guarantee, the
          Guarantee Trustee shall deem it desirable that a matter be proved or
          established before taking, suffering or omitting any action hereunder,
          the Guarantee 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 of the Guarantor
          which, upon receipt of such request, shall be promptly delivered by
          the Guarantor.

                   (iv)   The Guarantee Trustee shall have no duty to see to any
          recording, filing or registration of any instrument (or any
          rerecording, refiling or registration thereof).

                   (v)    The Guarantee Trustee may consult with counsel of its
          selection, and the advice or opinion of such counsel with respect to
          legal matters 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 accordance with such advice or opinion. Such counsel
          may be counsel to the Guarantor or any of its Affiliates and may
          include any of its employees. The Guarantee Trustee shall have the
          right at any time to seek instructions concerning the administration
          of this Guarantee from any court of competent jurisdiction.

                   (vi)   The Guarantee Trustee shall be under no obligation to
          exercise any of the rights or powers vested in it by this Guarantee at
          the request or direction of any Holder, unless such Holder shall have
          provided to the Guarantee Trustee such security and indemnity,
          reasonably satisfactory to the Guarantee Trustee, against the costs,
          expenses (including attorneys' fees and expenses and the expenses of
          the Guarantee Trustee's agents, nominees or custodians) and
          liabilities that might be incurred by it in complying with such
          request or direction, including such reasonable advances as may be
          requested by the Guarantee Trustee; provided, however, that nothing
                                              --------  -------
          contained in this Section 2.2(a)(vi) shall be taken to relieve the
          Guarantee Trustee, upon the occurrence of an Event of Default, of its
          obligation to exercise the rights and powers vested in it by this
          Guarantee.

                   (vii)  The Guarantee Trustee shall not be bound to make any
          investigation into the facts or matters stated in any resolution,
          certificate, statement, instrument,

                                       6
<PAGE>

          opinion, report, notice, request, direction, consent, order, bond,
          debenture, note, other evidence of indebtedness or other paper or
          document, but the Guarantee Trustee, in its discretion, may make such
          further inquiry or investigation into such facts or matters as it may
          see fit.

                  (viii)  The Guarantee Trustee may execute any of the trusts or
          powers hereunder or perform any duties hereunder either directly or by
          or through agents, nominees, custodians or attorneys, and the
          Guarantee Trustee shall not be responsible for any misconduct or
          negligence on the part of any agent or attorney appointed with due
          care by it hereunder.

                  (ix)    Any action taken by the Guarantee Trustee or its
          agents hereunder shall bind the Holders of the Capital Securities, and
          the signature of the Guarantee Trustee or its agents alone shall be
          sufficient and effective to perform any such action. No third party
          shall be required to inquire as to the authority of the Guarantee
          Trustee to so act or as to its compliance with any of the terms and
          provisions of this Guarantee, both of which shall be conclusively
          evidenced by the Guarantee Trustee's or its agent's taking such
          action.

                  (x)     Whenever in the administration of this Guarantee the
          Guarantee Trustee shall deem it desirable to receive instructions with
          respect to enforcing any remedy or right or taking any other action
          hereunder, the Guarantee Trustee (A) may request instructions from the
          Holders of a Majority in liquidation amount of the Capital Securities,
          (B) may refrain from enforcing such remedy or right or taking such
          other action until such instructions are received, and (C) shall be
          protected in conclusively relying on or acting in accordance with such
          instructions.

                  (xi)    The Guarantee Trustee shall not be liable for any
          action taken, suffered, or omitted to be taken by it in good faith and
          reasonably believed by it to be authorized or within the discretion or
          rights or powers conferred upon it by this Guarantee.

          (b)  No provision of this Guarantee shall be deemed to impose any duty
     or obligation on the Guarantee 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 Guarantee
     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
     Guarantee Trustee shall be construed to be a duty.

SECTION 2.3  Not Responsible for Recitals or Issuance of Guarantee
             -----------------------------------------------------

          The recitals contained in this Guarantee shall be taken as the
statements of the Guarantor, and the Guarantee Trustee does not assume any
responsibility for their correctness.  The Guarantee Trustee makes no
representation as to the validity or sufficiency of this Guarantee.

                                       7
<PAGE>

SECTION 2.4  Events of Default; Waiver
             -------------------------

          (a)  An Event of Default under this Guarantee will occur upon the
failure of the Guarantor to perform any of its payment or other obligations
hereunder.

          (b)  The Holders of a Majority in liquidation amount of Capital
Securities may, voting or consenting as a class, on behalf of the Holders of all
of the Capital Securities, waive any past Event of Default and its consequences.
Upon such waiver, any such Event of Default shall cease to exist, and shall be
deemed to have been cured, for every purpose of this Guarantee, but no such
waiver shall extend to any subsequent or other default or Event of Default or
impair any right consequent thereon.

SECTION 2.5  Events of Default; Notice
             -------------------------

          (a)  The Guarantee Trustee shall, within 90 days after the occurrence
     of an Event of Default, transmit by mail, first class postage prepaid, to
     the Holders of the Capital Securities, notices of all Events of Default
     actually known to a Responsible Officer of the Guarantee Trustee, unless
     such defaults have been cured before the giving of such notice, provided,
                                                                     --------
     however, that the Guarantee Trustee shall be protected in withholding such
     -------
     notice if and so long as a Responsible Officer of the Guarantee Trustee in
     good faith determines that the withholding of such notice is in the
     interests of the Holders of the Capital Securities.

          (b)  The Guarantee Trustee shall not be deemed to have knowledge of
     any Event of Default unless the Guarantee Trustee shall have received
     written notice from the Guarantor or a Holder of the Capital Securities
     (except in the case of a payment default), or a Responsible Officer of the
     Guarantee Trustee charged with the administration of this Guarantee shall
     have obtained actual knowledge, thereof.

                                  ARTICLE III
                               GUARANTEE TRUSTEE

SECTION 3.1  Guarantee Trustee; Eligibility
             ------------------------------

          (a)  There shall at all times be a Guarantee Trustee which shall:

                 (i)   not be an Affiliate of the Guarantor; and

                 (ii)  be a corporation organized and doing business under the
          laws of the United States of America or any State or Territory thereof
          or of the District of Columbia, or Person authorized under such laws
          to exercise corporate trust powers, having a combined capital and
          surplus of at least 50 million U.S. dollars ($50,000,000), and subject
          to supervision or examination by Federal, State, Territorial or
          District of Columbia authority.  If such corporation publishes reports
          of condition at least annually, pursuant to law or to the requirements
          of the supervising or examining authority referred to above, then, for
          the purposes of this Section 3.1(a) (ii), the combined capital and
          surplus of such corporation shall

                                       8
<PAGE>

          be deemed to be its combined capital and surplus as set forth in its
          most recent report of condition so published.

          (b)  If at any time the Guarantee Trustee shall cease to be eligible
     to so act under Section 3.1(a), the Guarantee Trustee shall immediately
     resign in the manner and with the effect set out in Section 3.2(c).

          (c)  If the Guarantee Trustee has or shall acquire any "conflicting
     interest" within the meaning of Section 310(b) of the Trust Indenture Act,
     the Guarantee Trustee shall either eliminate such interest or resign to the
     extent and in the manner provided by, and subject to this Guarantee.

SECTION 3.2  Appointment, Removal and Resignation of Guarantee Trustee
             ---------------------------------------------------------

          (a)  Subject to Section 3.2(b), the Guarantee Trustee may be appointed
     or removed without cause at any time by the Guarantor except during an
     Event of Default.

          (b)  The Guarantee Trustee shall not be removed in accordance with
     Section 3.2(a) until a Successor Guarantee Trustee has been appointed and
     has accepted such appointment by written instrument executed by such
     Successor Guarantee Trustee and delivered to the Guarantor.

          (c)  The Guarantee Trustee appointed to office shall hold office until
     a Successor Guarantee Trustee shall have been appointed or until its
     removal or resignation.  The Guarantee Trustee may resign from office
     (without need for prior or subsequent accounting) by an instrument in
     writing executed by the Guarantee Trustee and delivered to the Guarantor,
     which resignation shall not take effect until a Successor Guarantee Trustee
     has been appointed and has accepted such appointment by an instrument in
     writing executed by such Successor Guarantee Trustee and delivered to the
     Guarantor and the resigning Guarantee Trustee.

          (d)  If no Successor Guarantee Trustee shall have been appointed and
     accepted appointment as provided in this Section 3.2 within 60 days after
     delivery of an instrument of removal or resignation, the Guarantee Trustee
     resigning or being removed may petition any court of competent jurisdiction
     for appointment of a Successor Guarantee Trustee.  Such court may
     thereupon, after prescribing such notice, if any, as it may deem proper,
     appoint a Successor Guarantee Trustee.

          (e)  No Guarantee Trustee shall be liable for the acts or omissions to
     act of any Successor Guarantee Trustee.

          (f)  Upon termination of this Guarantee or removal or resignation of
     the Guarantee Trustee pursuant to this Section 3.2, the Guarantor shall pay
     to the Guarantee Trustee all amounts owing to the Guarantee Trustee under
     Sections 7.2 and 7.3 accrued to the date of such termination, removal or
     resignation.

                                  ARTICLE IV
                                   GUARANTEE

                                       9
<PAGE>

SECTION 4.1  Guarantee
             ---------

          (a)  The Guarantor irrevocably and unconditionally agrees to pay in
full to the Holders the Guarantee Payments (without duplication of amounts
theretofore paid by the Issuer), as and when due, regardless of any defense
(except as defense of payment by the Issuer), right of set-off or counterclaim
that the Issuer may have or assert.  The Guarantor fully, knowingly and
unconditionally waives any right that the Guarantor may have to revoke this
Guarantee under Section 2815 of the California Civil Code or otherwise.  The
Guarantor's obligation to make a Guarantee Payment may be satisfied by direct
payment of the required amounts by the Guarantor to the Holders or by causing
the Issuer to pay such amounts to the Holders.

          (b)  The Guarantor hereby also agrees to assume any and all
Obligations of the Trust and in the event any such Obligation is not so assumed,
subject to the terms and conditions hereof, the Guarantor hereby irrevocably and
unconditionally guarantees to each Beneficiary the full payment, when and as
due, of any and all obligations to such Beneficiaries.  This Agreement is
intended to be for the benefit of, and to be enforceable by, all such
Beneficiaries, whether or not such Beneficiaries have received notice hereof.

SECTION 4.2  Waiver of Notice and Demand
             ---------------------------

          The Guarantor hereby waives notice of acceptance of this Guarantee and
of any liability to which it applies or may apply, presentment, demand for
payment, any right to require a proceeding first against the Issuer or any other
Person before proceeding against the Guarantor, protest, notice of nonpayment,
notice of dishonor, notice of redemption and all other notices and demands.

SECTION 4.3  Obligations Not Affected
             ------------------------

          The obligations, covenants, agreements and duties of the Guarantor
under this Guarantee shall in no way be affected or impaired by reason of the
happening from time to time of any of the following:

          (a)  the release or waiver, by operation of law or otherwise, of the
     performance or observance by the Issuer of any express or implied
     agreement, covenant, term or condition relating to the Capital Securities
     to be performed or observed by the Issuer;

          (b)  the extension of time for the payment by the Issuer of all or any
     portion of the Distributions, Redemption Price, Special Redemption Price,
     Liquidation Distribution or any other sums payable under the terms of the
     Capital Securities or the extension of time for the performance of any
     other obligation under, arising out of, or in connection with, the Capital
     Securities (other than an extension of time for payment of Distributions,
     Redemption Price, Special Redemption Price, Liquidation Distribution or
     other sum payable that results from the extension of any interest payment
     period on the Debentures or any extension of the maturity date of the
     Debentures permitted by the Indenture);

          (c)  any failure, omission, delay or lack of diligence on the part of
     the Holders to enforce, assert or exercise any right, privilege, power or
     remedy conferred on the Holders

                                       10
<PAGE>

     pursuant to the terms of the Capital Securities, or any action on the part
     of the Issuer granting indulgence or extension of any kind;

          (d)  the voluntary or involuntary liquidation, dissolution, sale of
     any collateral, receivership, insolvency, bankruptcy, assignment for the
     benefit of creditors, reorganization, arrangement, composition or
     readjustment of debt of, or other similar proceedings affecting, the Issuer
     or any of the assets of the Issuer;

          (e)  any invalidity of, or defect or deficiency in, the Capital
     Securities;

          (f)  the settlement or compromise of any obligation guaranteed hereby
     or hereby incurred; or

          (g)  any other circumstance whatsoever that might otherwise constitute
     a legal or equitable discharge or defense of a guarantor, it being the
     intent of this Section 4.3 that the obligations of the Guarantor hereunder
     shall be absolute and unconditional under any and all circumstances.

          There shall be no obligation of the Holders to give notice to, or
obtain consent of, the Guarantor with respect to the happening of any of the
foregoing.

SECTION 4.4  Rights of Holders
             -----------------

          (a)  The Holders of a Majority in liquidation amount of the Capital
     Securities have the right to direct the time, method and place of
     conducting any proceeding for any remedy available to the Guarantee Trustee
     in respect of this Guarantee or to direct the exercise of any trust or
     power conferred upon the Guarantee Trustee under this Guarantee; provided,
                                                                      --------
     however, that (subject to Section 2.1) the Guarantee Trustee shall have the
     -------
     right to decline to follow any such direction if the Guarantee Trustee
     shall determine that the actions so directed would be unjustly prejudicial
     to the Holders not taking part in such direction or if the Guarantee
     Trustee being advised by counsel determines that the action or proceeding
     so directed may not lawfully be taken or if the Guarantor Trustee in good
     faith by its board of directors or trustees, executive committees or a
     trust committee of directors or trustees and/or Responsible Officers shall
     determine that the action or proceedings so directed would involve the
     Guarantee Trustee in personal liability.

          (b)  Any Holder of Capital Securities may institute a legal proceeding
     directly against the Guarantor to enforce the Guarantee Trustee's rights
     under this Guarantee, without first instituting a legal proceeding against
     the Issuer, the Guarantee Trustee or any other Person.  The Guarantor
     waives any right or remedy to require that any such action be brought first
     against the Issuer, the Guarantee Trustee or any other Person before so
     proceeding directly against the Guarantor.

SECTION 4.5  Guarantee of Payment
             --------------------

          This Guarantee creates a guarantee of payment and not of collection.

                                       11
<PAGE>

SECTION 4.6  Subrogation
             -----------

          The Guarantor shall be subrogated to all (if any) rights of the
Holders of Capital Securities against the Issuer in respect of any amounts paid
to such Holders by the Guarantor under this Guarantee; provided, however, that
                                                       --------  -------
the Guarantor shall not (except to the extent required by mandatory provisions
of law) be entitled to enforce or exercise any right that it may acquire by way
of subrogation or any indemnity, reimbursement or other agreement, in all cases
as a result of payment under this Guarantee, if, after giving effect to any such
payment, any amounts are due and unpaid under this Guarantee.  If any amount
shall be paid to the Guarantor in violation of the preceding sentence, the
Guarantor agrees to hold such amount in trust for the Holders and to pay over
such amount to the Holders.

SECTION 4.7  Independent Obligations
             -----------------------

          The Guarantor acknowledges that its obligations hereunder are
independent of the obligations of the Issuer with respect to the Capital
Securities and that the Guarantor shall be liable as principal and as debtor
hereunder to make Guarantee Payments pursuant to the terms of this Guarantee
notwithstanding the occurrence of any event referred to in subsections (a)
through (g), inclusive, of Section 4.3 hereof.

SECTION 4.8  Enforcement by a Beneficiary
             ----------------------------

          A Beneficiary may enforce the obligations of the Guarantor contained
in Section 4.1(b) directly against the Guarantor and the Guarantor waives any
right or remedy to require that any action be brought against the Trust or any
other person or entity before preceding against the Guarantor.  The Guarantor
shall be subrogated to all rights (if any) of any Beneficiary against the Trust
in respect of any amounts paid to the Beneficiaries by the Guarantor under this
Agreement; provided, however, that the Guarantor shall not (except to the extent
           --------  -------
required by mandatory provisions of law) be entitled to enforce or exercise any
rights that it may acquire by way of subrogation or any indemnity, reimbursement
or other agreement, in all cases as a result of payment under this Agreement,
if, after giving effect to such payment, any amounts are due and unpaid under
this Agreement.

                                   ARTICLE V
                   LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 5.1  Limitation of Transactions
             --------------------------

          So long as any Capital Securities remain outstanding, if (a) there
shall have occurred and be continuing an Event of Default or a Declaration Event
of Default or (b) the Guarantor shall have selected an Extension Period as
provided in the Declaration and such period, or any extension thereof, shall be
continuing, then the Guarantor may not (x) declare or pay any dividends or
distributions on, or redeem, purchase, acquire, or make a liquidation payment
with respect to, any of the Guarantor's capital stock or (y) make any payment of
principal of or interest or premium, if any, on or repay, repurchase or redeem
any debt securities of the Guarantor (including Other Debentures) that rank pari
passu in all respects with or junior in interest to the Debentures or (iii) make
any guarantee payments with respect to any guarantee

                                       12
<PAGE>

by the Company of the debt securities of any subsidiary of the Company
(including Other Guarantees) if such guarantee ranks pari passu with or junior
in right of payment to the Debentures (other than (i) repurchases, redemptions
or other acquisitions of shares of capital stock of the Guarantor in connection
with any employment contract, benefit plan or other similar arrangement with or
for the benefit of one or more employees, officers, directors or consultants, in
connection with a dividend reinvestment or stockholder stock purchase plan or in
connection with the issuance of capital stock of the Guarantor (or securities
convertible into or exercisable for such capital stock) as consideration in an
acquisition transaction entered into prior to occurrence of the Event of Default
or Declaration Event of Default or the applicable Extension Period, (ii) as a
result of any exchange or conversion of any class or series of the Guarantor's
capital stock (or any capital stock of a subsidiary of the Guarantor) for any
class or series of the Guarantor's capital stock or of any class or series of
the Guarantor's indebtedness for any class or series of the Guarantor's capital
stock, (iii) the purchase of fractional interests in shares of the Guarantor's
capital stock pursuant to the conversion or exchange provisions of such capital
stock or the security being converted or exchanged, (iv) any declaration of a
dividend in connection with any stockholder's rights plan, or the issuance of
rights, stock or other property under any stockholder's rights plan, or the
redemption or repurchase of rights pursuant thereto, or (v) any dividend in the
form of stock, warrants, options or other rights where the dividend stock or the
stock issuable upon exercise of such warrants, options or other rights is the
same stock as that on which the dividend is being paid or ranks pari passu with
or junior to such stock).

SECTION 5.2  Ranking
             -------

          This Guarantee will constitute an unsecured obligation of the
Guarantor and will rank subordinate and junior in right of payment to all
present and future Senior Indebtedness (as defined in the Indenture) of the
Guarantor.  By their acceptance thereof, each Holder of Capital Securities
agrees to the foregoing provisions of this Guarantee and the other terms set
forth herein, it being understood that the terms of Article XV of the Indenture
shall apply to the obligations of the Guarantor under this guarantee as if such
Article were set forth herein in full.

          The right of the Guarantor to participate in any distribution of
assets of any of its subsidiaries upon any such subsidiary's liquidation or
reorganization or otherwise is subject to the prior claims of creditors of that
subsidiary, except to the extent the Guarantor may itself be recognized as a
creditor of that subsidiary.  Accordingly, the Guarantor's obligations under
this Guarantee will be effectively subordinated to all existing and future
liabilities of the Guarantor's subsidiaries, and claimants should look only to
the assets of the Guarantor for payments thereunder.  This Guarantee does not
limit the incurrence or issuance of other secured or unsecured debt of the
Guarantor, including Senior Indebtedness of the Guarantor, under any indenture
that the Guarantor may enter into in the future or otherwise.

                                  ARTICLE VI
                                  TERMINATION

SECTION 6.1  Termination
             -----------

          This Guarantee shall terminate as to the Capital Securities (i) upon
full payment of the Redemption Price of all Capital Securities, (ii) upon the
distribution of the Debentures to

                                       13
<PAGE>

the Holders of all of the Capital Securities or (iii) upon full payment of the
amounts payable in accordance with the Declaration upon dissolution, winding up
or liquidation of the Issuer. This Guarantee will continue to be effective or
will be reinstated, as the case may be, if at any time any Holder of Capital
Securities must restore payment of any sums paid under the Capital Securities or
under this Guarantee.

                                  ARTICLE VII
                                INDEMNIFICATION

SECTION 7.1  Exculpation
             -----------

          (a)  No Indemnified Person shall be liable, responsible or accountable
     in damages or otherwise to the Guarantor or any Covered Person for any
     loss, damage or claim incurred by reason of any act or omission performed
     or omitted by such Indemnified Person in good faith in accordance with this
     Guarantee and in a manner that such Indemnified Person reasonably believed
     to be within the scope of the authority conferred on such Indemnified
     Person by this Guarantee or by law, except that an Indemnified Person shall
     be liable for any such loss, damage or claim incurred by reason of such
     Indemnified Person's negligence or willful misconduct with respect to such
     acts or omissions.

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

SECTION 7.2  Indemnification
             ---------------

          (a)  The Guarantor agrees to indemnify each Indemnified Person for,
and to hold each Indemnified Person harmless against, any and all loss,
liability, damage, claim or expense incurred without negligence or willful
misconduct on the part of the Indemnified Person, arising out of or in
connection with the acceptance or administration of the trust or trusts
hereunder, including the costs and expenses (including reasonable legal fees and
expenses) of the Indemnified Person defending itself against, or investigating,
any claim or liability in connection with the exercise or performance of any of
the Indemnified Person's powers or duties hereunder. The obligation to indemnify
as set forth in this Section 7.2 shall survive the resignation or removal of the
Guarantee Trustee and the termination of this Guarantee.

          (b)  Promptly after receipt by an Indemnified Person under this
Section 7.2 of notice of the commencement of any action, such Indemnified Person
will, if a claim in respect thereof is to be made against the Guarantor under
this Section 7.2, notify the Guarantor in writing of the commencement thereof;
but the failure so to notify the Guarantor (i) will not

                                       14
<PAGE>

relieve the Guarantor from liability under paragraph (a) above unless and to the
extent that the Guarantor did not otherwise learn of such action and such
failure results in the forfeiture by the Guarantor of substantial rights and
defenses and (ii) will not, in any event, relieve the Guarantor from any
obligations to any Guarantor other than the indemnification obligation provided
in paragraph (a) above. The Guarantor shall be entitled to appoint counsel of
the Guarantor's choice at the Guarantor's expense to represent the Indemnified
Person in any action for which indemnification is sought (in which case the
Guarantor shall not thereafter be responsible for the fees and expenses of any
separate counsel retained by the Indemnified Person or Persons except as set
forth below); provided, however, that such counsel shall be satisfactory to the
              --------  -------
Indemnified Person. Notwithstanding the Guarantor's election to appoint counsel
to represent the Guarantor in an action, the Indemnified Person shall have the
right to employ separate counsel (including local counsel), and the Guarantor
shall bear the reasonable fees, costs and expenses of such separate counsel if
(i) the use of counsel chosen by the Guarantor to represent the Indemnified
Person would present such counsel with a conflict of interest, (ii) the actual
or potential defendants in, or targets of, any such action include both the
Indemnified Person and the Guarantor and the Indemnified Person shall have
reasonably concluded that there may be legal defenses available to it and/or
other Indemnified Person which are different from or additional to those
available to the Guarantor, (iii) the Guarantor shall not have employed counsel
satisfactory to the Indemnified Person to represent the Indemnified Person
within a reasonable time after notice of the institution of such action or (iv)
the Guarantor shall authorize the Indemnified Person to employ separate counsel
at the expense of the Guarantor. The Guarantor will not, without the prior
written consent of the Indemnified Persons, settle or compromise or consent to
the entry of any judgment with respect to any pending or threatened claim,
action, suit or proceeding in respect of which indemnification or contribution
may be sought hereunder (whether or not the Indemnified Persons are actual or
potential parties to such claim or action) unless such settlement, compromise or
consent includes an unconditional release of each Indemnified Person from all
liability arising out of such claim, action, suit or proceeding.

SECTION 7.3  Compensation; Reimbursement of Expenses
             ---------------------------------------

          The Guarantor agrees:

          (a)  to pay to the Guarantee Trustee from time to time such
compensation for all services rendered by it hereunder as the parties shall
agree to from time to time (which compensation shall not be limited by any
provision of law in regard to the compensation of a trustee of an express
trust); and

          (b)  except as otherwise expressly provided herein, to reimburse the
Guarantee Trustee upon request for all reasonable expenses, disbursements and
advances incurred or made by it in accordance with any provision of this
Guarantee (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 its negligence or willful misconduct.

          The provisions of this Section 7.3 shall survive the resignation or
removal of the Guarantee Trustee and the termination of this Guarantee.

                                       15
<PAGE>

                                 ARTICLE VIII
                                 MISCELLANEOUS

SECTION 8.1  Successors and Assigns
             ----------------------

          All guarantees and agreements contained in this Guarantee shall bind
the successors, assigns, receivers, trustees and representatives of the
Guarantor and shall inure to the benefit of the Holders of the Capital
Securities then outstanding.  Except in connection with any merger or
consolidation of the Guarantor with or into another entity or any sale, transfer
or lease of the Guarantor's assets to another entity, in each case, to the
extent permitted under the Indenture, the Guarantor may not assign its rights or
delegate its obligations under this Guarantee without the prior approval of the
Holders of at least a Majority in liquidation amount of the Capital Securities.

SECTION 8.2  Amendments
             ----------

          Except with respect to any changes that do not adversely affect the
rights of Holders of the Capital Securities in any material respect (in which
case no consent of Holders will be required), this Guarantee may be amended only
with the prior approval of the Holders of not less than a Majority in
liquidation amount of the Capital Securities.  The provisions of the Declaration
with respect to amendments thereof apply to the giving of such approval.

SECTION 8.3  Notices
             -------

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

          (a)  If given to the Guarantee Trustee, at the Guarantee Trustee's
     mailing address set forth below (or such other address as the Guarantee
     Trustee may give notice of to the Holders of the Capital Securities):

                 The Bank of New York
                 101 Barclay Street, Floor 21W
                 New York, NY 10286
                 Attention: Corporate Trust Administration
                 Telecopy: 212-815-5915

          (b)  If given to the Guarantor, at the Guarantor's mailing address set
     forth below (or such other address as the Guarantor may give notice of to
     the Holders of the Capital Securities and to the Guarantee Trustee):

                 400 Emerson Street
                 3rd Floor
                 Palo Alto, CA 94301
                 Attention: Linda M. Iannone
                 Telecopy: 650-473-9419

                                       16
<PAGE>

          (c)  If given to any Holder of the Capital Securities, at the address
     set forth on the books and records of the Issuer.

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

SECTION 8.4  Benefit
             -------

          This Guarantee is solely for the benefit of the Holders of the Capital
Securities and, subject to Section 2.1(a), is not separately transferable from
the Capital Securities.

SECTION 8.5  Governing Law
             -------------

          THIS GUARANTEE SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN
ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK, WITHOUT REGARD TO CONFLICT OF
LAWS PRINCIPLES THEREOF.

                                       17
<PAGE>

           THIS GUARANTEE is executed as of the day and year first above
written.

                                GREATER BAY BANCORP,
                                as Guarantor

                                By: /s/ Steven C. Smith
                                    --------------------------------
                                    Name:  Steven C. Smith
                                    Title: Executive Vice President,
                                           Chief Administrative Officer and
                                           Chief Financial Officer

                                THE BANK OF NEW YORK,
                                as Guarantee Trustee

                                By: /s/ Annette L. Kos
                                    --------------------------------
                                    Name:  Annette L. Kos
                                    Title: Assistant Vice President

                                       18

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