EXHIBIT 4.5
                                                                     -----------



================================================================================



                      AMENDED AND RESTATED TRUST AGREEMENT

                                       OF

                                 GBB CAPITAL II



                          Dated as of August 12, 1998



================================================================================

 
                               TABLE OF CONTENTS
                                                                            Page

                                   ARTICLE I
                        INTERPRETATION AND DEFINITIONS

SECTION 1.1    Definitions.................................................   2

                                  ARTICLE II
                              TRUST INDENTURE ACT

SECTION 2.1    Trust Indenture Act; Application............................  10
SECTION 2.2    Lists of Holders of Securities..............................  10
SECTION 2.3    Reports by the Property Trustee.............................  11
SECTION 2.4    Periodic Reports to Property Trustee........................  11
SECTION 2.5    Evidence of Compliance with Conditions Precedent............  11
SECTION 2.6    Events of Default; Waiver...................................  11
SECTION 2.7    Default; Notice.............................................  13

                                  ARTICLE III
                                 ORGANIZATION

SECTION 3.1    Name........................................................  14
SECTION 3.2    Office......................................................  14
SECTION 3.3    Purpose.....................................................  14
SECTION 3.4    Authority...................................................  14
SECTION 3.5    Title to Property of the Trust..............................  14
SECTION 3.6    Powers and Duties of the Administrative Trustees............  15
SECTION 3.7    Prohibition of Actions by the Trust and the Trustees........  18
SECTION 3.8    Powers and Duties of the Property Trustee...................  19
SECTION 3.9    Certain Duties and Responsibilities of the Property Trustee.  21
SECTION 3.10   Certain Rights of Property Trustee..........................  23
SECTION 3.11   Delaware Trustee............................................  25
SECTION 3.12   Execution of Documents......................................  25
SECTION 3.13   Not Responsible for Recitals or Issuance of Securities......  25
SECTION 3.14   Duration of Trust...........................................  26
SECTION 3.15   Mergers.....................................................  26

                                  ARTICLE IV
                                    SPONSOR

SECTION 4.1    Sponsor's Purchase of Common Securities.....................  28
SECTION 4.2    Responsibilities of the Sponsor.............................  28
SECTION 4.3    Right to Proceed............................................  28

                                       i

 
SECTION 4.4    Right to Dissolve Trust.....................................  29

                                   ARTICLE V
                                   TRUSTEES

SECTION 5.1    Number of Trustees; Appointment of Co-Trustee...............  29
SECTION 5.2    Delaware Trustee............................................  30
SECTION 5.3    Property Trustee; Eligibility...............................  30
SECTION 5.4    Certain Qualifications of Administrative Trustees and
               Delaware Trustee Generally..................................  31
SECTION 5.5    Administrative Trustees.....................................  31
SECTION 5.6    Appointment, Removal and Resignation of Trustees............  32
SECTION 5.7    Vacancies among Trustees....................................  34
SECTION 5.8    Effect of Vacancies.........................................  34
SECTION 5.9    Meetings....................................................  34
SECTION 5.10   Delegation of Power.........................................  35
SECTION 5.11   Merger, Conversion, Consolidation or Succession to Business.  35

                                  ARTICLE VI
                                 DISTRIBUTIONS

SECTION 6.1    Distributions...............................................  35

                                  ARTICLE VII
                            ISSUANCE OF SECURITIES

SECTION 7.1    General Provisions Regarding Securities.....................  36
SECTION 7.2    Execution and Authentication................................  36
SECTION 7.3    Form and Dating.............................................  37
SECTION 7.4    Registrar, Paying Agent and Exchange Agent..................  39
SECTION 7.5    Paying Agent to Hold Money in Trust.........................  39
SECTION 7.6    Replacement Securities......................................  39
SECTION 7.7    Outstanding Capital Securities..............................  40
SECTION 7.8    Capital Securities in Treasury..............................  40
SECTION 7.9    Temporary Securities........................................  40
SECTION 7.10   Cancellation................................................  41
SECTION 7.11   CUSIP Numbers...............................................  41

                                 ARTICLE VIII
                             DISSOLUTION OF TRUST

SECTION 8.1    Dissolution of Trust........................................  42

                                       ii

 
                                  ARTICLE IX
                             TRANSFER OF INTERESTS

SECTION 9.1    Transfer of Securities......................................  43
SECTION 9.2    Transfer Procedures and Restrictions........................  44
SECTION 9.3    Deemed Security Holders.....................................  53
SECTION 9.4    Book-Entry Interests........................................  53
SECTION 9.5    Notices to Clearing Agency..................................  54
SECTION 9.6    Appointment of Successor Clearing Agency....................  54

                                   ARTICLE X
                          LIMITATION OF LIABILITY OF
                   HOLDERS OF SECURITIES, TRUSTEES OR OTHERS

SECTION 10.1   Liability...................................................  55
SECTION 10.2   Exculpation.................................................  55
SECTION 10.3   Fiduciary Duty..............................................  55
SECTION 10.4   Indemnification.............................................  56
SECTION 10.5   Outside Businesses..........................................  59

                                  ARTICLE XI
                                  ACCOUNTING

SECTION 11.1   Fiscal Year.................................................  60
SECTION 11.2   Certain Accounting Matters..................................  60
SECTION 11.3   Banking.....................................................  60
SECTION 11.4   Withholding.................................................  60

                                  ARTICLE XII
                            AMENDMENTS AND MEETINGS

SECTION 12.1   Amendments..................................................  61
SECTION 12.2   Meetings of the Holders; Action by Written Consent..........  63

                                 ARTICLE XIII
                      REPRESENTATIONS OF PROPERTY TRUSTEE
                             AND DELAWARE TRUSTEE

SECTION 13.1   Representations and Warranties of Property Trustee..........  64
SECTION 13.2   Representations and Warranties of Delaware Trustee..........  65

                                      iii

 
                                  ARTICLE XIV
                              REGISTRATION RIGHTS

SECTION 14.1   Registration Rights Agreement; Liquidated Damages...........  66

                                  ARTICLE XV
                                 MISCELLANEOUS

SECTION 15.1   Notices.....................................................  68
SECTION 15.2   Governing Law...............................................  68
SECTION 15.3   Intention of the Parties....................................  68
SECTION 15.4   Headings....................................................  68
SECTION 15.5   Successors and Assigns......................................  68
SECTION 15.6   Partial Enforceability......................................  68
SECTION 15.7   Counterparts................................................  68
TERMS OF FLOATING RATE CAPITAL SECURITIES, SERIES A/SERIES B
        FLOATING RATE COMMON SECURITIES.................................... I-1
 
EXHIBIT A-1

        FORM OF CAPITAL SECURITY CERTIFICATE.............................. A1-1
 
EXHIBIT A-2

        FORM OF COMMON SECURITY CERTIFICATE............................... A2-1
 

                                       iv

 
                             CROSS-REFERENCE TABLE*

Section of                                                        Section of
Trust Indenture                                                     Trust
Act of 1939, as                                                   Agreement
amended         
                
310(a) .......................................................  5.3
310(b) .......................................................  5.3(c), 5.3(d)
311(a) .......................................................  2.2(b)
311(b) .......................................................  2.2(b)
312(a) .......................................................  2.2(a)
312(b) .......................................................  2.2(b)
313    .......................................................  2.3
314(a) .......................................................  2.4; 3.6(j)
314(c) .......................................................  2.5
315(a) .......................................................  3.9
315(b) .......................................................  2.7(a)
315(c) .......................................................  3.9(a)
315(d) .......................................................  3.9(b)
316(a) .......................................................  2.6
316(c) .......................................................  3.6(e)
317(a) .......................................................  3.8(e); 3.8(h)
317(b) .......................................................  3.8(i); 7.5

- ----------

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

                                       v

 
                              AMENDED AND RESTATED
                                TRUST AGREEMENT
                                       OF
                                 GBB CAPITAL II

                          Dated as of AUGUST 12, 1998

          AMENDED AND RESTATED TRUST AGREEMENT ("Trust Agreement") dated and
effective as of AUGUST 12, 1998, by and among the Trustees (as defined herein),
the Sponsor (as defined herein) and the Holders (as defined herein), from time
to time, of undivided beneficial interests in the assets of the Trust to be
issued pursuant to this Trust Agreement;

          WHEREAS, the Trustees and the Sponsor established GBB Capital II (the
"Trust"), a trust created under the Delaware Business Trust Act pursuant to a
Trust Agreement dated as of May 18, 1998 and supplemented as of July 31, 1998
(the "Original Trust Agreement"), and a Certificate of Trust filed with the
Secretary of State of the State of Delaware on May 18, 1998, for the sole
purpose of issuing and selling certain securities representing undivided
beneficial interests in the assets of the Trust, investing the proceeds thereof
in certain Debentures of the Debenture Issuer (each as hereinafter defined), and
engaging in only those activities necessary, advisable or incidental thereto;
and

          WHEREAS, all of the Trustees and the Sponsor, by this Trust Agreement,
amend and restate each and every term and provision of the Original Trust
Agreement;

          WHEREAS, all of the Trustees and the Sponsor, by this Trust Agreement,
ratify the actions of each Trustee taken prior to the date hereof;

          NOW, THEREFORE, it being the intention of the parties hereto to
continue the Trust as a business trust under the Business Trust Act and that
this Trust Agreement constitute the governing instrument of such business trust,
the Trustees declare that all assets contributed to the Trust will be held in
trust for the benefit of the holders, from time to time, of the securities
representing undivided beneficial interests in the assets of the Trust issued
hereunder, subject to the provisions of this Trust Agreement and, in
consideration of the mutual covenants contained herein and other good and
valuable consideration, the receipt of which is hereby acknowledged, the
parties, intending to be legally bound hereby, agree as follows:

 
                                   ARTICLE I
                        INTERPRETATION AND DEFINITIONS

SECTION 1.1   Definitions.
              ----------- 

              Unless the context otherwise requires:

              (a) capitalized terms used in this Trust Agreement but not
defined in the preamble above or elsewhere herein have the respective meanings
assigned to them in this Section 1.1;

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

              (c) all references to "the Trust Agreement" or "this Trust
Agreement" are to this Trust Agreement and each Annex and Exhibit hereto, as
modified, supplemented or amended from time to time;

              (d) all references in this Trust Agreement to Articles and
Sections and Annexes and Exhibits are to Articles and Sections of and Annexes
and Exhibits to this Trust Agreement unless otherwise specified;

              (e) a term defined in the Trust Indenture Act has the same
meaning when used in this Trust Agreement unless otherwise defined in this Trust
Agreement or unless the context otherwise requires;

              (f) a term defined in the Indenture (as defined herein) has the
same meaning when used in this Trust Agreement unless otherwise defined in this
Trust Agreement or the context otherwise requires; and

              (g) a reference to the singular includes the plural and vice
versa.

              "Administrative Trustee" has the meaning set forth in Section 
               ----------------------                                        
              5.1.

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

              "Agent" means any Paying Agent, Registrar or Exchange Agent.
               -----                                                      

              "Authorized Officer" of a Person means any other Person that is
               ------------------                                            
              authorized to legally bind such former Person.

              "Book-Entry Interest" means a beneficial interest in the Global
               -------------------                                           
Capital Security registered in the name of a Clearing Agency or its nominee,
ownership and transfers of which shall be maintained and made through book
entries by a Clearing Agency as described in Section 9.4.

                                       2

 
              "Business Day" means any day other than a Saturday or a Sunday
               ------------  
or a day on which banking institutions in San Francisco, California, Wilmington,
Delaware, or New York, New York, are authorized or required by law or executive
order to remain closed.

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

              "Capital Securities" means, collectively, the Series A Capital
               ------------------                                           
Securities and the Series B Capital Securities.

              "Capital Securities Guarantee" means, collectively, the Series A
               ----------------------------                                   
Capital Securities Guarantee and the Series B Capital Securities Guarantee.

              "Capital Security Beneficial Owner" means, with respect to a 
               ---------------------------------                    
Book-Entry Interest, a Person who is the beneficial owner of such Book-Entry
Interest, as reflected on the books of the Clearing Agency, or on the books of a
Person maintaining an account with such Clearing Agency (directly as a Clearing
Agency Participant or as an indirect participant, in each case in accordance
with the rules of such Clearing Agency).

              "Capital Security Certificate" has the meaning set forth in 
               ----------------------------                        
Section 9.4.

              "Clearing Agency" means an organization registered as a "Clearing
               ---------------                                                 
Agency" pursuant to Section 17A of the Exchange Act that is acting as depositary
for the Capital Securities and in whose name or in the name of a nominee of that
organization shall be registered a global certificate and which shall undertake
to effect book entry transfers and pledges of the Capital Securities.

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

              "Closing Time" means the "Closing Time" as defined in the Purchase
               ------------                                                     
Agreement.

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

              "Commission" means the United States Securities and Exchange
               ----------                                                 
Commission as from time to time constituted, or if at any time after the
execution of this Trust Agreement such Commission is not existing and performing
the duties now assigned to it under applicable federal securities laws, then the
body performing such duties at such time.

              "Common Securities" has the meaning specified in Section 7.1(a).
               -----------------                                              

                                       3

 
              "Common Securities Guarantee" means the Common Securities 
               ---------------------------  
Guarantee Agreement, dated as of the Closing Time, entered into by Greater Bay
Bancorp, with respect to the Common Securities.

              "Common Securities Subscription Agreement" means the Common
               ----------------------------------------                  
Securities Subscription Agreement, dated as of the Closing Time, between the
Trust and Greater Bay Bancorp relating to the Common Securities.

              "Company Indemnified Person" means (a) any Administrative 
               --------------------------        
Trustee; (b) any Affiliate of any Administrative Trustee; (c) any officers,
directors, shareholders, members, partners, employees, representatives or agents
of any Administrative Trustee; or (d) any officer, employee or agent of the
Trust or its Affiliates.

              "Corporate Trust Office" means the office of the Property 
               ----------------------                                   
Trustee at which the corporate trust business of the Property Trustee shall, at
any particular time, be principally administered, which office at the date of
execution of this Trust Agreement is located at Rodney Square North, 1100 North
Market Street, Wilmington, Delaware 19890-0001, Attention: Corporate Trust
Department.

              "Covered Person" means: (a) any officer, director, shareholder,
               --------------                                                
partner, member, representative, employee or agent of (i) the Trust or (ii) the
Trust's Affiliates; and (b) any Holder of Securities.

              "Debenture Issuer" means Greater Bay Bancorp, a California
               ----------------                                         
corporation, or any successor entity resulting from any consolidation,
amalgamation, merger or other business combination, in its capacity as issuer of
the Debentures under the Indenture.

              "Debenture Subscription Agreement" means the Debenture 
               --------------------------------                      
Subscription Agreement, dated as of the Closing Time, between the Debenture
Issuer and the Trust in respect of the Debentures.

              "Debenture Trustee" means Wilmington Trust Company, a Delaware 
               -----------------                                    
banking corporation, as trustee under the Indenture until a successor is
appointed thereunder, and thereafter means such successor trustee.

              "Debentures" means, collectively, the Series A Debentures and the
               ----------                                                      
Series B Debentures.

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

              "Definitive Capital Securities" has the meaning set forth in 
               -----------------------------          
Section 7.3(c).

              "Delaware Trustee" has the meaning set forth in Section 5.1.
               ----------------                                           

                                       4

 
              "Direct Action" has the meaning set forth in Section 3.8(e).
               -------------                                              

              "Distribution" means a distribution payable to Holders in 
               ------------        
accordance with Section 6.1.

              "DTC" means The Depository Trust Company, the initial Clearing
               ---                                                          
Agency.

              "Event of Default" with respect to the Securities means an Event
               ----------------  
of Default (as defined in the Indenture) that has occurred and is continuing
with respect to the Debentures.

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

              "Exchange Agent" has the meaning set forth in Section 7.4.
               --------------                                           

              "Exchange Offer" means the offer that may be made pursuant to the
               --------------                                                  
Registration Rights Agreement (i) by the Trust to exchange Series B Capital
Securities for Series A Capital Securities and (ii) by the Debenture Issuer to
exchange Series B Debentures for Series A Debentures and to execute the Series B
Capital Securities Guarantee in respect of the Series B Capital Securities.

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

              "Fiduciary Indemnified Person" has the meaning set forth in 
               ----------------------------                               
Section 10.4(b).

              "Fiscal Year" has the meaning set forth in Section 11.1.
               -----------                                            

              "Global Capital Security'' has the meaning set forth in Section
               -----------------------                                       
7.3(a).

              "Holder" means a Person in whose name a Security or Successor 
               ------  
Security is registered, such Person being a beneficial owner within the meaning
of the Business Trust Act.

              "Indemnified Person" means a Company Indemnified Person or a
               ------------------                                         
Fiduciary Indemnified Person.

              "Indenture" means the Indenture, dated as of the Closing Time, 
               ---------        
between the Debenture Issuer and the Debenture Trustee, as amended from time to
time.

              "Initial Optional Redemption Date" has the meaning set forth in
               --------------------------------                              
Section 4(b) of Annex I hereto.

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

                                       5

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

              "Investment Company Event" has the meaning set forth in Section 
               ------------------------                                       
4(c) of Annex I hereto.

              "Legal Action" has the meaning set forth in Section 3.6(g).
               ------------                                              

              "Like Amount" has the meaning set forth in Section 3 of Annex I
               -----------                                                   
hereto.

              "Liquidated Damages Agreement" means the Liquidated Damages 
               ----------------------------            
Agreement, dated as of August 7, 1998, by and among the Debenture Issuer, the
Trust and the Initial Purchaser named therein, as amended from time to time.

              "List of Holders" has the meaning set forth in Section 2.2(a).
               ---------------                                              

              "Majority in Liquidation Amount " means, with respect to the Trust
               ------------------------------                                   
Securities, except as provided in the terms of the Capital Securities or by the
Trust Indenture Act, Holders of outstanding Trust Securities voting together as
a single class or, as the context may require, Holders of outstanding Capital
Securities or Holders of outstanding Common Securities voting separately as a
class, who are the record owners of more than 50% of the aggregate liquidation
amount (including the amount that would be paid on redemption, liquidation or
otherwise, plus accumulated and unpaid Distributions to the date upon which the
voting percentages are determined) of all outstanding Securities of the relevant
class.

              "Offering Memorandum" has the meaning set forth in Section
               -------------------                                      
3.6(b)(i).

              "Officers' Certificate" means, with respect to any Person, a
               ---------------------                                      
certificate signed by the Chairman, the Chief Executive Officer, the President,
an Executive or Senior Vice President, a Vice President, the Chief Financial
Officer, and the Secretary or an Assistant Secretary. Any Officers' Certificate
delivered by the Trust shall be signed by at least one Administrative Trustee.
Any Officers' Certificate delivered with respect to compliance with a condition
or covenant provided for in this Trust Agreement shall include:

              (a) a statement that each officer signing the Certificate has read
     the covenants or conditions 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 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

                                       6

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

              "Opinion of Counsel" means a written opinion of counsel, who may
               ------------------        
be an employee of the Sponsor, and who shall be acceptable to the Property
Trustee.

              "Participants" has the meaning specified in Section 7.3(b).
               ------------                                              

              "Paying Agent"  has the meaning specified in Section 7.4.
               ------------                                            

              "Payment Amount" has the meaning specified in Section 6.1.
               --------------                                           

              "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.

              "PORTAL" has the meaning set forth in Section 3.6(b) (iii).
               ------                                                    

              "Property Trustee" has the meaning set forth in Section 5.3(a).
               ----------------                                              

              "Property Trustee Account" has the meaning set forth in Section
               ------------------------                                      
3.8(c)(i).

              "Purchase Agreement" means the Purchase Agreement relating to the
               ------------------                                              
Capital Securities, dated August 7, 1998, by and among the Trust, the Debenture
Issuer and the Initial Purchaser named therein.

              "QIBs" shall mean qualified institutional buyers as defined in 
               ----  
Rule 144A.

              "Quorum" means a majority of the Administrative Trustees or, if 
               ------        
there are only two Administrative Trustees, both of them.

              "Redemption Price" has the meaning set forth in Section 4(a) of
               ----------------                                              
Annex I hereto.

              "Registrar" has the meaning set forth in Section 7.4.
               ---------                                           

              "Registration Rights Agreement" means the Registration Rights
               -----------------------------                               
Agreement, dated as of August 7, 1998, by and among the Trust, the Debenture
Issuer and the Initial Purchaser named therein, as amended from time to time.

              "Registration Statement" has the meaning set forth in the
               ----------------------                                  
Registration Rights Agreement.

              "Regulatory Capital Event" has the meaning set forth in Section 
               ------------------------  
4(c) of Annex I hereto.

                                       7

 
              "Related Party" means, with respect to the Sponsor, any direct or
               -------------                                                   
indirect wholly owned subsidiary of the Sponsor or any other Person that owns,
directly or indirectly, 100% of the outstanding voting securities of the
Sponsor.

              "Responsible Officer" means any officer within the Corporate Trust
               -------------------                                              
Office of the Property Trustee with direct responsibility for the administration
of this Trust Agreement and also means, with respect to a particular corporate
trust matter, any other officer of the Property Trustee to whom such matter is
referred because of that officer's knowledge of and familiarity with the
particular subject.

              "Restricted Capital Security" means a Capital Security required by
               ---------------------------                                      
Section 9.2 to contain a Restricted Securities Legend.

              "Restricted Definitive Capital Securities" has the meaning set 
               ----------------------------------------  
forth in Section 7.3(c).

              "Restricted Securities Legend" has the meaning set forth in 
               ----------------------------  
Section 9.2(i).

              "Rule 3a-5" means Rule 3a-5 under the Investment Company Act, or
               ---------                                                     
 any successor rule or regulation.

              "Rule 144" means Rule 144 under the Securities Act, as such rule
               --------  
may be amended from time to time, or any similar rule or regulation hereafter
adopted by the Commission.

              "Rule 144A" means Rule 144A under the Securities Act, as such 
               ---------  
rule may be amended from time to time, or any similar rule or regulation
hereafter adopted by the Commission.

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

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

              "Securities Guarantees" means the Common Securities Guarantee and
               ---------------------                                           
the Capital Securities Guarantee.

              "Series A Capital Securities" has the meaning specified in Section
               ---------------------------                                      
7.1(a).

              "Series A Capital Securities Guarantee" means the Series A Capital
               -------------------------------------                            
Securities Guarantee Agreement, dated as of the Closing Time, by, Greater Bay
Bancorp in respect of the Series A Capital Securities.

              "Series A Debentures" means the Floating Rate Junior Subordinated
               -------------------                                             
Deferrable Interest Debentures due September 15, 2028, Series A, of the
Debenture Issuer issued pursuant to the Indenture.

                                       8

 
              "Series B Capital Securities" has the meaning specified in Section
               ---------------------------                                      
7.1(a).

              "Series B Capital Securities Guarantee" means the Series B Capital
               -------------------------------------                            
Securities Guarantee Agreement to be entered into in connection with the
Exchange Offer by Greater Bay Bancorp, in respect of the Series B Capital
Securities.

              "Series B Debentures" means the Floating Rate Junior Subordinated
               -------------------                                             
Deferrable Interest Debentures due September 15, 2028, Series B, of the
Debenture Issuer to be issued pursuant to the Indenture in connection with the
Exchange Offer.

              "Special Event" has the meaning set forth in Section 4(c) of 
               -------------  
Annex I hereto.

              "Sponsor" means Greater Bay Bancorp, a California corporation, 
               -------        
or any successor entity resulting from any merger, consolidation, amalgamation
or other business combination, in its capacity as sponsor of the Trust.

              "Successor Delaware Trustee" has the meaning set forth in Section
               --------------------------                                      
5.6(b)(ii).

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

              "Successor Property Trustee" has the meaning set forth in Section
               --------------------------                                      
3.8(f)(ii).

              "Successor Securities" has the meaning set forth in Section
               --------------------                                      
3.15(b)(i).

              "Super Majority" has the meaning set forth in Section 2.6(a) (ii).
               --------------                                                   

              "Tax Event" has the meaning set forth in Section 4(c) of Annex I
               ---------                                                      
hereto.

              "10% in Liquidation Amount" means, with respect to the Trust
               -------------------------                                  
Securities, except as provided in the terms of the Capital Securities or by the
Trust Indenture Act, Holders of outstanding Trust Securities voting together as
a single class or, as the context may require, Holders of outstanding Capital
Securities or Holders of outstanding Common Securities voting separately as a
class, who are the record owners of 10% or more of the aggregate liquidation
amount (including the amount that would be paid on redemption, liquidation or
otherwise, plus accumulated and unpaid Distributions to the date upon which the
voting percentages are determined) of all outstanding Securities of the relevant
class.

              "Treasury Regulations" means the income tax regulations, including
               --------------------                                             
temporary and proposed regulations, promulgated under the Code by the United
States Treasury Department, as such regulations may be amended from time to time
(including corresponding provisions of succeeding regulations).

              "Trust Indenture Act" means the Trust Indenture Act of 1939, as
               -------------------                                           
amended from time to time, or any successor legislation.

                                       9

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

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

              "Unrestricted Global Capital Security" has the meaning set forth
              ------------------------------------                              
in Section 9.2(b).

                                  ARTICLE II
                              TRUST INDENTURE ACT

SECTION 2.1   Trust Indenture Act; Application.
              -------------------------------- 

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

              (b) The Property Trustee shall be the only Trustee which is a
trustee for the purposes of the Trust Indenture Act.
 
              (c) If and to the extent that any provision of this Trust
Agreement limits, qualifies or conflicts with the duties imposed by (S)(S) 310
to 317, inclusive, of the Trust Indenture Act, such imposed duties shall
control.

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


SECTION 2.2   Lists of Holders of Securities.
              ------------------------------ 

              (a) Each of the Sponsor and the Administrative Trustees on behalf
of the Trust shall provide the Property Trustee, unless the Property Trustee is
Registrar for the Securities, (i) within 14 days after each record date for
payment of Distributions, a list, in such form as the Property Trustee may
reasonably require, of the names and addresses of the Holders ("List of
Holders") as of such record date, provided that, neither the Sponsor nor the
                                  -------- ----                             
Administrative Trustees on behalf of the Trust shall be obligated to provide
such List of Holders at any time that the List of Holders does not differ from
the most recent List of Holders given to the Property Trustee by the Sponsor and
the Administrative Trustees on behalf of the Trust, and (ii) at any other time,
within 30 days of receipt by the Trust of a written request for a List of
Holders as of a date no more than 14 days before such List of Holders is given
to the Property Trustee. The Property Trustee shall 

                                       10

 
preserve, in as current a form as is reasonably practicable, all information
contained in Lists of Holders given to it or which it receives in the capacity
as Paying Agent (if acting in such capacity), provided that the Property Trustee
                                              -------- ----
may destroy any List of Holders previously given to it on receipt of a new List
of Holders.

              (b) The Property Trustee shall comply with its obligations under
(S)(S) 311(a), 311(b) and 312(b) of the Trust Indenture Act.

SECTION 2.3   Reports by the Property Trustee.
              ------------------------------- 

              Within 60 days after the date hereof, and no later than the
anniversary date hereof in each succeeding year, the Property Trustee shall
provide to the Holders of the Capital Securities such reports as are required by
(S) 313 of the Trust Indenture Act, if any, in the form and in the manner
provided by (S) 313 of the Trust Indenture Act. The Property Trustee shall also
comply with the requirements of (S) 313(d) of the Trust Indenture Act.

SECTION 2.4   Periodic Reports to Property Trustee.
              ------------------------------------ 

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

SECTION 2.5   Evidence of Compliance with Conditions Precedent.
              ------------------------------------------------ 

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

SECTION 2.6   Events of Default; Waiver.
              ------------------------- 

              (a) The Holders of a Majority in Liquidation Amount of Capital
Securities may, by vote, on behalf of the Holders of all of the Capital
Securities, waive any past Event of Default in respect of the Capital Securities
and its consequences, provided that, if the underlying Event of Default under
                      -------- ----                                          
the Indenture:

                  (i)    is not waivable under the Indenture, the Event of
          Default under the Trust Agreement shall also not be waivable; or

                  (ii)   requires the consent or vote of greater than a majority
          in aggregate principal amount of the holders of the Debentures (a
          "Super Majority") to be waived under the Indenture, the Event of
          Default under the Trust Agreement may 

                                       11

 
          only be waived by the vote of the Holders of at least the proportion
          in aggregate liquidation amount of the Capital Securities that the
          relevant Super Majority represents of the aggregate principal amount
          of the Debentures outstanding.

The foregoing provisions of this Section 2.6(a) shall be in lieu of (S)
316(a)(1)(B) of the Trust Indenture Act and such (S) 316(a)(1)(B) of the Trust
Indenture Act is hereby expressly excluded from this Trust Agreement and the
Securities, as permitted by the Trust Indenture Act. Upon such waiver, any such
Default shall cease to exist, and any Event of Default with respect to the
Capital Securities arising therefrom shall be deemed to have been cured, for
every purpose of this Trust Agreement, but no such waiver shall extend to any
subsequent or other Default or an Event of Default with respect to the Capital
Securities or impair any right consequent thereon. Any waiver by the Holders of
the Capital Securities of an Event of Default with respect to the Capital
Securities shall also be deemed to constitute a waiver by the Holders of the
Common Securities of any such Event of Default with respect to the Common
Securities for all purposes of this Trust Agreement without any further act,
vote, or consent of the Holders of the Common Securities.

              (b) The Holders of a Majority in Liquidation Amount of the Common
Securities may, by vote, on behalf of the Holders of all of the Common
Securities, waive any past Event of Default with respect to the Common
Securities and its consequences, provided that, if the underlying Event of
                                 -------- ----                            
Default under the Indenture:

                  (i)    is not waivable under the Indenture, except where the
          Holders of the Common Securities are deemed to have waived such Event
          of Default under the Trust Agreement as provided below in this Section
          2.6(b), the Event of Default under the Trust Agreement shall also not
          be waivable; or

                  (ii)   requires the consent or vote of a Super Majority to be
          waived, except where the Holders of the Common Securities are deemed
          to have waived such Event of Default under the Trust Agreement as
          provided below in this Section 2.6(b), the Event of Default under the
          Trust Agreement may only be waived by the vote of the Holders of at
          least the proportion in aggregate liquidation amount of the Common
          Securities that the relevant Super Majority represents of the
          aggregate principal amount of the Debentures outstanding;

provided further, each Holder of Common Securities will be deemed to have waived
- -------- -------                                                                
any such Event of Default and all Events of Default with respect to the Common
Securities and their consequences if all Events of Default with respect to the
Capital Securities have been cured, waived or otherwise eliminated, and until
such Events of Default have been so cured, waived or otherwise eliminated, the
Property Trustee will be deemed to be acting solely on behalf of the Holders of
the Capital Securities and only the Holders of the Capital Securities will have
the right to direct the Property Trustee in accordance with the terms of the
Securities. The foregoing provisions of this Section 2.6(b) shall be in lieu of
(S)(S) 316(a)(1)(A) and 316(a)(1)(B) of the Trust Indenture Act and such (S)(S)
316(a)(1)(A) and 316(a)(1)(B) of the Trust Indenture Act are hereby expressly
excluded from this Trust Agreement and the Securities, as permitted by the Trust
Indenture Act. Subject to the foregoing provisions of this Section 2.6(b), upon
such waiver, any such Default shall cease to exist and any 

                                       12

 
Event of Default with respect to the Common Securities arising therefrom shall
be deemed to have been cured for every purpose of this Trust Agreement, but no
such waiver shall extend to any subsequent or other Default or Event of Default
with respect to the Common Securities or impair any right consequent thereon.

              (c) A waiver of an Event of Default under the Indenture by the
Property Trustee, at the direction of the Holders of the Capital Securities,
constitutes a waiver of the corresponding Event of Default under this Trust
Agreement. The foregoing provisions of this Section 2.6(c) shall be in lieu of
(S) 316(a)(1)(B) of the Trust Indenture Act and such (S) 316(a)(1)(B) of the
Trust Indenture Act is hereby expressly excluded from this Trust Agreement and
the Securities, as permitted by the Trust Indenture Act.

SECTION 2.7   Default; Notice.
              --------------- 

              (a) The Property Trustee shall, within 90 days after a Responsible
Officer obtains actual knowledge of the occurrence of a Default with respect to
the Securities, transmit by mail, first class postage prepaid, to the Holders,
notices of all such Defaults, unless such Defaults have been cured before the
giving of such notice or previously waived; provided, however, that except in
                                            --------  -------                
the case of a Default arising from the nonpayment of principal of or interest
(including Compounded Interest and Additional Sums (as such terms are defined in
the Indenture), if any) or Liquidated Damages (as defined in the Registration
Rights Agreement) on any of the Debentures, the Property Trustee shall be
protected in withholding such notice if and so long as a Responsible Officer in
good faith determines that the withholding of such notice is in the interests of
the Holders.

              (b) The Property Trustee shall not be deemed to have knowledge of
any Default or Event of Default except:

                  (i)    a Default or Event of Default under Sections 5.01(a)
          (other than the payment of Compounded Interest, Additional Sums and
          Liquidated Damages) and 5.01(b) of the Indenture; or

                  (ii)   any Default or Event of Default as to which the
          Property Trustee shall have received written notice or of which a
          Responsible Officer charged with the administration of the Trust
          Agreement shall have actual knowledge.

              (c) Within ten Business Days after a Responsible Officer obtains
actual knowledge of the occurrence of any Event of Default, the Property Trustee
shall transmit notice of such Event of Default to the Holders of the Capital
Securities, the Administrative Trustees and the Sponsor, unless such Event of
Default shall have been cured or waived. The Sponsor and the Administrative
Trustees shall file annually with the Property Trustee a certification as to
whether or not they are in compliance with all the conditions and covenants
applicable to them under this Trust Agreement.

                                       13

 
                                  ARTICLE III
                                 ORGANIZATION

SECTION 3.1   Name.
              ---- 

              The Trust is named GBB Capital II as such name may be modified
from time to time by the Administrative Trustees following written notice to the
Delaware Trustee, the Property Trustee and the Holders. The Trust's activities
may be conducted under the name of the Trust or any other name deemed advisable
by the Administrative Trustees.

SECTION 3.2   Office.
              ------ 

              The address of the principal office of the Trust is c/o Greater
Bay Bancorp, 2860 West Bayshore Road, Palo Alto, CA 94303. On ten Business Days'
prior written notice to the Delaware Trustee, the Property Trustee and the
Holders of Securities, the Administrative Trustees may designate another
principal office.

SECTION 3.3   Purpose.
              ------- 

              The exclusive purposes and functions of the Trust are (a) to issue
and sell Securities, (b) use the proceeds from the sale of the Securities to
acquire the Debentures, and (c) except as otherwise limited herein, to engage in
only those other activities necessary, advisable or incidental thereto,
including without limitation, those activities specified in Sections 3.6, 3.8,
3.9, 3.10, 3.11 and/or 3.12. The Trust shall not borrow money, issue debt or
reinvest proceeds derived from investments, mortgage or pledge any of its
assets, or otherwise undertake (or permit to be undertaken) any activity that
would cause the Trust not to be classified for United States federal income tax
purposes as a grantor trust.

SECTION 3.4   Authority.
              --------- 

              Subject to the limitations provided in this Trust Agreement and to
the specific duties of the Property Trustee, the Administrative Trustees shall
have exclusive and complete authority to carry out the purposes of the Trust. An
action taken by one or more of the Administrative Trustees in accordance with
their powers shall constitute the act of and serve to bind the Trust and an
action taken by the Property Trustee on behalf of the Trust in accordance with
its powers shall constitute the act of and serve to bind the Trust. In dealing
with the Trustees acting on behalf of the Trust, no Person shall be required to
inquire into the authority of the Trustees to bind the Trust. Persons dealing
with the Trust are entitled to rely conclusively on the power and authority of
the Trustees as set forth in this Trust Agreement.

SECTION 3.5   Title to Property of the Trust.
              ------------------------------ 

              Except as provided in Section 3.8 with respect to the Debentures
and the Property Trustee Account or as otherwise provided in this Trust
Agreement, legal title to all assets of the Trust 

                                       14

 
shall be vested in the Trust. The Holders shall not have legal title to any part
of the assets of the Trust, but shall have an undivided beneficial interest in
the assets of the Trust.

SECTION 3.6   Powers and Duties of the Administrative Trustees.
              ------------------------------------------------ 

              The Administrative Trustees shall have the exclusive power, duty
and authority, and are hereby authorized and directed, to cause the Trust to
engage in the following activities:

              (a) to execute, enter into and deliver the Common Securities
Subscription Agreement and to execute, deliver, issue and sell the Securities in
accordance with this Trust Agreement; provided, however, that except as
                                      --------  -------                
contemplated in Section 7.1(a), (i) the Trust may issue no more than one series
of Capital Securities and no more than one series of Common Securities, (ii)
there shall be no interests in the Trust other than the Securities, and (iii)
the issuance of Securities shall be limited to a simultaneous issuance of both
Capital Securities and Common Securities at the Closing Time;

              (b) in connection with the issue and sale of the Capital
Securities and the consummation of the Exchange Offer, at the direction of the
Sponsor, to:

                  (i)    prepare and execute, if necessary, an offering
          memorandum (the "Offering Memorandum") in preliminary and final form
          prepared by the Sponsor, in relation to the offering and sale of
          Series A Capital Securities to QIBs in reliance on Rule 144A and to
          institutional "accredited investors" (as defined in Rule 501(a)(1),
          (2), (3) or (7) under the Securities Act), and to execute and file
          with the Commission, at such time as is determined by the Sponsor, any
          Registration Statement, including any amendments thereto, as
          contemplated by the Registration Rights Agreement;

                  (ii)   execute and file any documents prepared by the Sponsor,
          or take any acts as determined by the Sponsor to be necessary in order
          to qualify or register all or part of the Capital Securities in any
          State in which the Sponsor has determined to qualify or register such
          Capital Securities for sale;

                  (iii)  execute and file an application, prepared by the
          Sponsor, to permit the Capital Securities to trade or be quoted or
          listed in or on the Private Offerings, Resales and Trading through
          Automated Linkages ("PORTAL") Market or any other securities exchange,
          quotation system or the Nasdaq Stock Market's National Market;

                  (iv)   execute and deliver the Common Securities Subscription
          Agreement, letters, documents, or instruments with DTC and other
          Clearing Agencies relating to the Capital Securities; and

                  (v)    if required, execute and file with the Commission a
          registration statement on Form 8-A, including any amendments thereto,
          prepared by 

                                       15

 
          the Sponsor, relating to the registration of the Capital Securities
          under Section 12(b) or 12(g) of the Exchange Act, as the case may be.

              (c) to execute, enter into and deliver the Debenture Subscription
Agreement, to acquire the Series A Debentures with the proceeds of the sale of
the Series A Capital Securities and the Common Securities and to exchange the
Series A Debentures for a like principal amount of Series B Debentures, pursuant
to the Exchange Offer; provided, however, that the Administrative Trustees shall
                       --------  -------                                        
cause legal title to the Debentures to be held of record in the name of the
Property Trustee for the benefit of the Holders;

              (d) to give the Sponsor and the Property Trustee prompt written
notice of the occurrence of a Special Event;

              (e) to establish a record date with respect to all actions to be
taken hereunder that require a record date to be established, including and with
respect to, for the purposes of (S) 316(c) of the Trust Indenture Act,
Distributions, voting rights, redemptions and exchanges, and to issue relevant
notices to the Holders with respect to such actions and applicable record dates;

              (f) to take all actions and perform such duties as may be required
of the Administrative Trustees pursuant to the terms of the Securities;

              (g) to the fullest extent permitted by law, to bring or defend,
pay, collect, compromise, arbitrate, resort to legal action, or otherwise adjust
claims or demands of or against the Trust ("Legal Action"), unless pursuant to
Section 3.8(e), the Property Trustee has the exclusive power to bring such Legal
Action;

              (h) to employ or otherwise engage employees, agents (who may be
designated as officers with titles), managers, contractors, advisors, and
consultants and pay reasonable compensation for such services;

              (i) to cause the Trust to comply with the Trust's obligations
under the Trust Indenture Act;

              (j) to give the certificate required by (S) 314(a)(4) of the Trust
Indenture Act to the Property Trustee, which certificate may be executed by any
Administrative Trustee;

              (k) to incur expenses that are necessary or incidental to carry
out any of the purposes of the Trust;

              (l) to act as, or appoint another Person to act as, Registrar and
Exchange Agent for the Securities or to appoint a Paying Agent for the
Securities as provided in Section 7.4 except for such time as such power to
appoint a Paying Agent is vested in the Property Trustee;

                                       16

 
              (m) to give prompt written notice to the Property Trustee and to
the Holders of any notice received from the Debenture Issuer of its election to
defer payments of interest on the Debentures by extending the interest payment
period under the Indenture;

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

              (o) to take any action, not inconsistent with this Trust Agreement
or with applicable law, that the Administrative Trustees determine in their
discretion to be necessary or desirable in carrying out the activities of the
Trust as set out in this Section 3.6, including, but not limited to:

                  (i)    causing the Trust not to be deemed to be an Investment
          Company required to be registered under the Investment Company Act;

                  (ii)   causing the Trust to continue to be classified for
          United States federal income tax purposes as a grantor trust; and

                  (iii)  cooperating with the Debenture Issuer to ensure that
          the Debentures will be treated as indebtedness of the Debenture Issuer
          for United States federal income tax purposes;

              (p) to take all action necessary to consummate the Exchange Offer
or otherwise cause the Capital Securities to be registered pursuant to an
effective registration statement in accordance with the provisions of the
Registration Rights Agreement;

              (q) to take all action necessary to cause all applicable tax
returns and tax information reports that are required to be filed with respect
to the Trust to be duly prepared and filed by the Administrative Trustees, on
behalf of the Trust; and

              (r) to execute and deliver all documents or instruments, perform
all duties and powers, and do all things for and on behalf of the Trust in all
matters necessary, advisable or incidental to the foregoing.

              The Administrative Trustees must exercise the powers set forth in
this Section 3.6 in a manner that is consistent with the purposes and functions
of the Trust set out in Section 3.3, and the Administrative Trustees shall not
take any action that is inconsistent with the purposes and functions of the
Trust set forth in Section 3.3.

              Subject to this Section 3.6, the Administrative Trustees shall
have none of the powers or the authority of the Property Trustee set forth in
Section 3.8.

                                       17

 
              Any expenses incurred by the Administrative Trustees pursuant to
this Section 3.6 shall be reimbursed by the Debenture Issuer.

SECTION 3.7   Prohibition of Actions by the Trust and the Trustees.
              ---------------------------------------------------- 

              The Trust shall not, and the Trustees (including the Property
Trustee and the Delaware Trustee) shall not, and the Administrative Trustees
shall cause the Trust not to, engage in any activity other than as required or
authorized by this Trust Agreement. The Trust shall not:

                  (i)    invest any proceeds received by the Trust from holding
          the Debentures, but shall distribute all such proceeds to Holders
          pursuant to the terms of this Trust Agreement and of the Securities;

                  (ii)   acquire any assets other than as expressly provided
          herein;

                  (iii)  possess Trust Property for other than a Trust purpose
          or execute any mortgage in respect of, or pledge, any Trust Property;

                  (iv)   make any loans or incur any indebtedness other than
          loans represented by the Debentures;

                  (v)    possess any power or otherwise act in such a way as to
          vary the Trust Property or the terms of the Securities in any way
          whatsoever;

                  (vi)   issue any securities or other evidences of beneficial
          ownership of, or beneficial interest in, the Trust other than the
          Securities;

                  (vii)  other than as provided in this Trust Agreement or Annex
          I hereto, (A) direct the time, method and place of conducting any
          proceeding with respect to any remedy available to the Debenture
          Trustee, or exercising any trust or power conferred upon the Debenture
          Trustee with respect to the Debentures, (B) waive any past default
          that is waivable under the Indenture, or (C) exercise any right to
          rescind or annul any declaration that the principal of all the
          Debentures shall be due and payable; or

                  (viii) consent to any amendment, modification or termination
          of the Indenture or the Debentures where such consent shall be
          required unless the Trust shall have received an opinion of
          independent tax counsel experienced in such matters to the effect that
          such amendment, modification or termination will not cause more than
          an insubstantial risk that the Trust will not be classified as a
          grantor trust for United States federal income tax purposes.

                                       18

 
SECTION 3.8   Powers and Duties of the Property Trustee.
              ----------------------------------------- 

              (a) The legal title to the Debentures shall be owned by and held
of record in the name of the Property Trustee in trust for the benefit of the
Trust and the Holders. The right, title and interest of the Property Trustee to
the Debentures shall vest automatically in each Person who may hereafter be
appointed as Property Trustee in accordance with Section 5.6. Such vesting and
cessation of title shall be effective whether or not conveyancing documents with
regard to the Debentures have been executed and delivered.

              (b) The Property Trustee shall not transfer its right, title and
interest in the Debentures to the Administrative Trustees or to the Delaware
Trustee (if the Property Trustee does not also act as Delaware Trustee).

              (c) The Property Trustee shall:

                  (i)    establish and maintain a segregated non-interest
          bearing trust account (the "Property Trustee Account") in the name of
          and under the exclusive control of the Property Trustee on behalf of
          the Holders and, upon the receipt of payments of funds made in respect
          of the Debentures held by the Property Trustee, deposit such funds
          into the Property Trustee Account and make payments or cause the
          Paying Agent to make payments to the Holders from the Property Trustee
          Account in accordance with Section 6.1; funds in the Property Trustee
          Account shall be held uninvested until disbursed in accordance with
          this Trust Agreement; and the Property Trustee Account shall be an
          account that is maintained with a banking institution the rating on
          whose long-term unsecured indebtedness by a "nationally recognized
          statistical rating organization," as that term is defined for purposes
          of Rule 436(g)(2) under the Securities Act, is at least equal to the
          rating assigned to the Capital Securities;

                  (ii)   engage in such ministerial activities as shall be
          necessary or appropriate to effect the redemption of the Securities to
          the extent the Debentures are redeemed or mature; and

                  (iii)  upon written notice of distribution issued by the
          Administrative Trustees in accordance with the terms of the
          Securities, engage in such ministerial activities as shall be
          necessary or appropriate to effect the distribution of the Debentures
          to Holders upon the occurrence of certain events.

              (d) The Property Trustee shall take all actions and perform such
duties as may be specifically required of the Property Trustee pursuant to the
terms of this Trust Agreement and the Securities.

              (e) Subject to Section 3.9(a), the Property Trustee shall take any
Legal Action which arises out of or in connection with an Event of Default of
which a Responsible Officer has actual knowledge or the Property Trustee's
duties and obligations under this Trust Agreement or the 

                                       19

 
Trust Indenture Act may so require; and if the Property Trustee shall have
failed to take such Legal Action following a written request from the Holders,
the Holders of the Capital Securities may, to the fullest extent permitted by
law, take such Legal Action, to the same extent as if such Holders of Capital
Securities held an aggregate principal amount of Debentures equal to the
aggregate liquidation amount of such Capital Securities, without first
proceeding against the Property Trustee or the Trust; provided, however, that if
                                                      --------  -------
an Event of Default has occurred and is continuing and such event is
attributable to the failure of the Debenture Issuer to pay the principal of or
interest (including Compounded Interest and Additional Sums, if any) or
Liquidated Damages, if any, on the Debentures on the date such principal, or
interest (including Compounded Interest and Additional Sums, if any) or
Liquidated Damages, if any, is otherwise payable (or in the case of redemption,
on the redemption date), then a Holder of Capital Securities may directly
institute a proceeding for enforcement of payment to such Holder of the
principal of or interest (including Compounded Interest and Additional Sums, if
any) or Liquidated Damages, if any, on the Debentures having a principal amount
equal to the aggregate liquidation amount of the Capital Securities of such
Holder (a "Direct Action") on or after the respective due date specified in the
Debentures. In connection with such Direct Action, the Holders of the Common
Securities will be subrogated to the rights of such Holder of Capital Securities
to the extent of any payment made by the Debenture Issuer to such Holder of
Capital Securities in such Direct Action. Except as provided in the preceding
sentences, the Holders of Capital Securities will not be able to exercise
directly any other remedy available to the holders of the Debentures.

              (f) The Property Trustee shall continue to serve as a Trustee
until either:

                  (i)    the Trust has been completely liquidated and the
          proceeds of the liquidation distributed to the Holders pursuant to the
          terms of the Securities and this Trust Agreement; or

                  (ii)   a successor Property Trustee has been appointed and has
          accepted that appointment in accordance with Section 5.6 (a "Successor
          Property Trustee").

              (g) The Property Trustee shall have the legal power to exercise
all of the rights, powers and privileges of a holder of Debentures under the
Indenture and, if an Event of Default actually known to a Responsible Officer
occurs and is continuing, the Property Trustee shall, for the benefit of
Holders, enforce its rights as holder of the Debentures subject to the rights of
the Holders pursuant to the terms of this Trust Agreement and the Securities.

              (h) The Property Trustee shall be authorized to undertake any
actions set forth in (S) 317(a) of the Trust Indenture Act.

              (i) For such time as the Property Trustee is the Paying Agent, the
Property Trustee may authorize one or more Persons to act as additional Paying
Agents and to pay Distributions, redemption payments or liquidation payments on
behalf of the Trust with respect to all Securities and any such Paying Agent
shall comply with (S) 317(b) of the Trust Indenture Act. Any such additional
Paying Agent may be removed by the Property Trustee at any time the Property
Trustee remains as Paying Agent and a successor Paying Agent or additional
Paying Agents may 

                                       20

 
be (but are not required to be) appointed at any time by the Property Trustee
while the Property Trustee is acting as Paying Agent.

              (j) Subject to this Section 3.8, the Property Trustee shall have
none of the duties, liabilities, powers or the authority of the Administrative
Trustees set forth in Section 3.6.

              Notwithstanding anything expressed or implied to the contrary in
this Trust Agreement or any Annex or Exhibit hereto, (i) the Property Trustee
must exercise the powers set forth in this Section 3.8 in a manner that is
consistent with the purposes and functions of the Trust set out in Section 3.3,
and (ii) the Property Trustee shall not take any action that is inconsistent
with the purposes and functions of the Trust set out in Section 3.3.

SECTION 3.9   Certain Duties and Responsibilities of the Property Trustee.
              ----------------------------------------------------------- 

              (a) The Property Trustee, before the occurrence of any Event of
Default (of which, other than in the case of Events of Default under Sections
5.01(a) and 5.01(b) of the Indenture, a Responsible Officer of the Property
Trustee has actual knowledge) and after the curing or waiving of all such Events
of Default that may have occurred, shall undertake to perform only such duties
as are specifically set forth in this Trust Agreement and in the Securities and
no implied covenants shall be read into this Trust Agreement against the
Property Trustee. In case an Event of Default has occurred (that has not been
cured or waived pursuant to Section 2.6) of which a Responsible Officer has
actual knowledge, the Property Trustee shall exercise such of the rights and
powers vested in it by this Trust Agreement, and use the same degree of care and
skill in their exercise, as a prudent person would exercise or use under the
circumstances in the conduct of his or her own affairs.

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

                  (i)    prior to the occurrence of an Event of Default (of
          which, other than in the case of Events of Default under Sections
          5.01(a) and 5.01(b) of the Indenture, a Responsible Officer of the
          Property Trustee has actual knowledge) and after the curing or waiving
          of all such Events of Default that may have occurred:

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

                                       21

 
                  (B) in the absence of bad faith on the part of the Property
                  Trustee, the Property 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 Property Trustee and conforming to the requirements of
                  this Trust Agreement; provided, however, that in the case of
                                        --------  -------      
                  any such certificates or opinions that by any provision hereof
                  are specifically required to be furnished to the Property
                  Trustee, the Property Trustee shall be under a duty to examine
                  the same to determine whether or not on their face they
                  conform to the requirements of this Trust Agreement;

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

                  (iii)  the Property Trustee shall not be liable with respect
          to any action taken or omitted to be taken by it in good faith in
          accordance with the direction of the Holders of a Majority in
          Liquidation Amount of the Securities relating to the time, method and
          place of conducting any proceeding for any remedy available to the
          Property Trustee, or exercising any trust or power conferred upon the
          Property Trustee under this Trust Agreement;

                  (iv)   no provision of this Trust Agreement shall require the
          Property 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;

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

                  (vi)   the Property Trustee shall have no duty or liability
          for or with respect to the value, genuineness, existence or
          sufficiency of the Debentures or the payment of any taxes or
          assessments levied thereon or in connection therewith;

                  (vii)  the Property Trustee shall not be liable for any
          interest on any money received by it except as it may otherwise agree
          in writing with the Sponsor. Money held by the Property Trustee need
          not be segregated from other funds held by it except in relation to
          the Property Trustee Account maintained by the Property Trustee
          pursuant to Section 3.8(c)(i) and except to the extent otherwise
          required by law; and

                                       22

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

SECTION 3.10  Certain Rights of Property Trustee.
              ---------------------------------- 

              (a) Subject to the provisions of Section 3.9:

                  (i)    the Property 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 Sponsor or the
          Administrative Trustees contemplated by this Trust Agreement may be
          sufficiently evidenced by an Officers' Certificate;

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

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

                  (v)    the Property Trustee may consult with counsel or other
          experts of its selection, and the advice or opinion of such counsel
          and experts with respect to legal matters or advice within the scope
          of such experts' area of expertise 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 Sponsor or any
          of its Affiliates, and may include any of its employees; and the
          Property Trustee shall have the right at any time to seek instructions
          concerning the administration of this Trust Agreement from any court
          of competent jurisdiction;

                  (vi)   the Property Trustee shall be under no obligation to
          exercise any of the rights or powers vested in it by this Trust
          Agreement at the request or 

                                       23

 
          direction of any Holder, unless such Holder shall have provided to the
          Property Trustee security and indemnity, reasonably satisfactory to
          the Property Trustee, against the costs, expenses (including
          reasonable attorneys' fees and expenses and the expenses of the
          Property 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 Property Trustee; provided, however, that, nothing contained 
                                --------  -------
          in this Section 3.10(a)(vi) shall be taken to relieve the Property
          Trustee, upon the occurrence of an Event of Default (of which, other
          than in the case of Events of Default under Sections 5.01(a) and
          5.01(b) of the Indenture, a Responsible Officer of the Property
          Trustee has actual knowledge), of its obligation to exercise the
          rights and powers vested in it by this Trust Agreement;

                  (vii)  the Property Trustee shall not be bound to make any
          investigation into the facts or matters stated in any resolution,
          certificate, statement, instrument, opinion, report, notice, request,
          direction, consent, order, bond, debenture, note, other evidence of
          indebtedness or other paper or document, but the Property Trustee, in
          its discretion, may make such further inquiry or investigation into
          such facts or matters as it may see fit;

                  (viii) the Property Trustee may execute any of the trusts or
          powers hereunder or perform any duties hereunder either directly or by
          or through agents, custodians, nominees or attorneys, and the Property
          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 Property Trustee or its agents
          hereunder shall bind the Trust and the Holders, and the signature of
          the Property Trustee or its agents alone shall be sufficient and
          effective to perform any such action and no third party shall be
          required to inquire as to the authority of the Property Trustee to so
          act or as to its compliance with any of the terms and provisions of
          this Trust Agreement, both of which shall be conclusively evidenced by
          the Property Trustee's or its agent's taking such action;

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

                                       24

 
                  (xi)   except as otherwise expressly provided by this Trust
          Agreement, the Property Trustee shall not be under any obligation to
          take any action that is discretionary under the provisions of this
          Trust Agreement; and

                  (xii)  the Property Trustee shall not be liable for any action
          taken, suffered, or omitted to be taken by it in good faith, without
          negligence or willful misconduct, and reasonably believed by it to be
          authorized or within the discretion or rights or powers conferred upon
          it by this Trust Agreement.

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

SECTION 3.11  Delaware Trustee.
              ---------------- 

              Notwithstanding any other provision of this Trust Agreement other
than Section 5.2, the Delaware Trustee shall not be entitled to exercise any
powers, nor shall the Delaware Trustee have any of the duties and
responsibilities of the Trustees described in this Trust Agreement (except as
required under the Business Trust Act). Except as set forth in Section 5.2, the
Delaware Trustee shall be a Trustee for the sole and limited purpose of
fulfilling the requirements of (S) 3807 of the Business Trust Act. In the event
the Delaware Trustee shall at any time be required to take any action or perform
any duty hereunder, the Delaware Trustee shall be entitled to the benefits of
Section 3.9(b)(ii) to (viii), inclusive, and Section 3.10. No implied covenants
or obligations shall be read into this Trust Agreement against the Delaware
Trustee.

SECTION 3.12  Execution of Documents.
              ---------------------- 

              Unless otherwise required by applicable law, each Administrative
Trustee, individually, is authorized to execute and deliver on behalf of the
Trust any documents, agreements, instruments or certificates that the
Administrative Trustees have the power and authority to execute pursuant to
Section 3.6.

SECTION 3.13  Not Responsible for Recitals or Issuance of Securities.
              ------------------------------------------------------ 

              The recitals contained in this Trust Agreement and the Securities
shall be taken as the statements of the Sponsor, and the Trustees do not assume
any responsibility for their correctness. The Trustees make no representations
as to the value or condition of the Trust Property or any part thereof. The
Trustees make no representations as to the validity or sufficiency of this Trust
Agreement or the Securities.

                                       25

 
SECTION 3.14  Duration of Trust.
              ----------------- 

              The Trust, unless dissolved pursuant to the provisions of Article
VIII hereof, shall have existence up to SEPTEMBER 15, 2033.

SECTION 3.15  Mergers.
              ------- 

              (a) The Trust may not merge with or into, consolidate, amalgamate,
or be replaced by, or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to any Person, except as described in
Section 3.15(b) and (c) and except with respect to the distribution of
Debentures to Holders pursuant to Section 8.1(a)(iii) of this Trust Agreement or
Section 3 of Annex I.

              (b) The Trust may, at the request of the Sponsor, with the consent
of the Administrative Trustees or, if there are more than two, a majority of the
Administrative Trustees and without the consent of the Holders, the Delaware
Trustee or the Property Trustee, merge with or into, consolidate, amalgamate, or
be replaced by, or convey, transfer or lease its properties and assets as an
entirety or substantially as an entirety to, a trust organized as such under the
laws of any State; provided that:
                   -------- ---- 

                  (i)    such successor entity (the "Successor Entity") either:

                  (A) expressly assumes all of the obligations of the Trust
                  under the Securities; or

                  (B) substitutes for the Securities other securities having
                  substantially the same terms as the Securities (the "Successor
                  Securities") so long as the Successor Securities rank the same
                  as the Securities rank in priority with respect to
                  Distributions and payments upon liquidation, redemption and
                  otherwise;

                  (ii)   the Sponsor expressly appoints a trustee of the
          Successor Entity that possesses the same powers and duties as the
          Property Trustee with respect to the Debentures;

                  (iii)  the Successor Securities (excluding any securities
          substituted for the Common Securities) are listed, quoted or included
          for trading, or any Successor Securities will be listed, quoted or
          included for trading upon notification of issuance, on any national
          securities exchange or with any other organization on which the
          Capital Securities are then listed, quoted or included;

                  (iv)   such merger, consolidation, amalgamation, replacement,
          conveyance, transfer or lease does not cause the Capital Securities
          (including any Successor Securities) or the Debentures to be
          downgraded by any nationally recognized 

                                       26

 
          statistical rating organization that publishes a rating on the Capital
          Securities or the Debentures;

                  (v)    such merger, consolidation, amalgamation, replacement,
          conveyance, transfer or lease does not adversely affect the rights,
          preferences and privileges of the Holders (including the holders of
          any Successor Securities) in any material respect (other than with
          respect to any dilution of the interests of such Holders or holders,
          as the case may be, in the Successor Entity);

                  (vi)   the Successor Entity has a purpose substantially
          identical to that of the Trust;

                  (vii)  prior to such merger, consolidation, amalgamation,
          replacement, conveyance, transfer or lease, the Sponsor has received
          an opinion of independent counsel to the Trust experienced in such
          matters to the effect that:

                  (A) such merger, consolidation, amalgamation, replacement,
                  conveyance, transfer or lease does not adversely affect the
                  rights, preferences and privileges of the Holders (including
                  the holders of any Successor Securities) in any material
                  respect (other than with respect to any dilution of the
                  interests of such Holders or holders, as the case may be, in
                  the Successor Entity);

                  (B) following such merger, consolidation, amalgamation,
                  replacement, conveyance, transfer or lease, neither the Trust
                  nor the Successor Entity will be required to register as an
                  Investment Company; and

                  (C) following such merger, consolidation, amalgamation,
                  replacement, conveyance, transfer or lease, the Trust (or the
                  Successor Entity) will continue to be classified as a grantor
                  trust for United States federal income tax purposes;

                  (viii) the Sponsor or any permitted successor or assignee owns
          all of the common securities of the Successor Entity and guarantees
          the obligations of the Successor Entity under the Successor Securities
          at least to the extent provided by the Securities Guarantees; and

                  (ix)   there shall have been furnished to the Property Trustee
          an Officers' Certificate and an Opinion of Counsel, each to the effect
          that all conditions precedent in this Trust Agreement to such
          transaction have been satisfied.

              (c) Notwithstanding Section 3.15(b), the Trust shall not, except
with the consent of Holders of 100% in aggregate liquidation amount of the
Securities, consolidate, amalgamate, merge with or into, or be replaced by, or
convey, transfer or lease its properties and assets as an entirety or
substantially as an entirety to, any other Person or permit any other Person to
consolidate

                                       27

amalgamate, merge with or into, or replace it if such consolidation,
amalgamation, merger, replacement, conveyance, transfer or lease would cause the
Trust or the Successor Entity not to be classified as a grantor trust for United
States federal income tax purposes.

                                  ARTICLE IV
                                    SPONSOR

SECTION 4.1   Sponsor's Purchase of Common Securities.
              --------------------------------------- 

              At the Closing Time, pursuant to the Common Securities
Subscription Agreement, the Sponsor will purchase all of the Common Securities
then issued by the Trust, in an amount equal to at least 3% of the total capital
of the Trust, at the same time as the Series A Capital Securities are issued and
sold.

SECTION 4.2   Responsibilities of the Sponsor.
              ------------------------------- 

              In connection with the issue and sale of the Capital Securities,
the Sponsor shall have the exclusive right and responsibility to engage in the
following activities:

              (a) to prepare the Offering Memorandum, in preliminary and final
form, and to prepare for filing by the Trust with the Commission any
Registration Statement, including any amendments thereto, as contemplated by the
Registration Rights Agreement;

              (b) to determine the States in which to take appropriate action to
qualify or register for sale all or part of the Capital Securities and to do any
and all such acts, other than actions which must be taken by the Trust, and
advise the Trust of actions it must take, and prepare for execution and filing
any documents to be executed and filed by the Trust, as the Sponsor deems
necessary or advisable in order to comply with the applicable laws of any such
States;

              (c) if deemed necessary or advisable by the Sponsor, to prepare
for filing by the Trust an application to permit the Capital Securities to trade
or be quoted or listed in or on the PORTAL market, or any other securities
exchange, quotation system or the Nasdaq Stock Market's National Market;

              (d) to prepare for filing by the Trust with the Commission a
registration statement on Form 8-A, including any amendments thereto, relating
to the registration of the Capital Securities under Section 12(b) or 12(g) of
the Exchange Act, as the case may be, including any amendments thereto; and

              (e) to negotiate the terms of, execute, enter into and deliver the
Purchase Agreement, the Registration Rights Agreement and the Liquidated Damages
Agreement.

SECTION 4.3   Right to Proceed.
              ---------------- 

                                       28

 
              The Sponsor acknowledges the rights of the Holders of Capital
Securities, in the event that a failure of the Trust to pay Distributions on the
Capital Securities is attributable to the failure of the Debenture Issuer to pay
the principal of or interest on the Debentures, to institute a proceeding
directly against the Debenture Issuer for enforcement of its payment obligations
in respect of the Debentures.

SECTION 4.4   Right to Dissolve Trust.
              ----------------------- 

              The Sponsor will have the right at any time to dissolve the Trust
and, after satisfaction of liabilities to creditors of the Trust as required by
applicable law, to cause the Debentures to be distributed to the Holders in
liquidation of the Trust. Such right is subject to the Sponsor's having received
(i) an Opinion of Counsel to the effect that such distribution will not cause
the Holders of Capital Securities to recognize gain or loss for United States
federal income tax purposes and (ii) all required regulatory approvals.

                                   ARTICLE V
                                   TRUSTEES

SECTION 5.1   Number of Trustees; Appointment of Co-Trustee.
              --------------------------------------------- 

              The number of Trustees initially shall be five (5), and:

              (a) at any time before the issuance of any Securities, the Sponsor
may, by written instrument, increase or decrease the number of Trustees; and

              (b) after the issuance of any Securities, the number of Trustees
may be increased or decreased by vote of the Holders of a Majority in
Liquidation Amount of the Common Securities voting as a class at a meeting of
the Holders of the Common Securities;

provided, however, that, the number of Trustees shall in no event be less than
- --------  -------                                                             
two (2); provided further that (1) one Trustee, in the case of a natural person,
         -------- -------                                                       
shall be a person who is a resident of the State of Delaware or that, if not a
natural person, is an entity which has its principal place of business in the
State of Delaware (the "Delaware Trustee"); (2) there shall be at least one
Trustee who is an employee or officer of, or is affiliated with, the Sponsor (an
"Administrative Trustee"); and (3) one Trustee shall be the Property Trustee for
so long as this Trust Agreement is required to qualify as an indenture under the
Trust Indenture Act, and such Trustee may also serve as Delaware Trustee if it
meets the applicable requirements. Notwithstanding the above, unless an Event of
Default shall have occurred and be continuing, at any time or times, for the
purpose of meeting the legal requirements of the Trust Indenture Act or of any
jurisdiction in which any part of the Trust Property may at the time be located,
the Holders of a Majority in Liquidation Amount of the Common Securities acting
as a class at a meeting of the Holders of the Common Securities, and the
Administrative Trustees shall have power to appoint one or more Persons either
to act as a co-trustee, jointly with the Property Trustee, of all or any part of
the Trust Property, or to act as separate trustee of any such property, in
either case with such powers as may be provided in the instrument of
appointment, and to vest in such Person or Persons in such capacity any
property, title, right or 

                                       29

 
power deemed necessary or desirable, subject to the provisions of this Trust
Agreement. In case an Event of Default has occurred and is continuing, the
Property Trustee alone shall have power to make any such appointment of a co-
trustee.

SECTION 5.2   Delaware Trustee.
              ---------------- 

              For so long as required by the Business Trust Act, the Delaware
Trustee shall be:

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

              (b) if not a natural person, an entity which has its principal
place of business in the State of Delaware, and otherwise meets the requirements
of applicable law,

provided, however, that, if the Property Trustee has its principal place of
- --------  -------                                                          
business in the State of Delaware and otherwise meets the requirements of
applicable law, then the Property Trustee shall also be the Delaware Trustee and
Section 3.11 shall have no application.

              The initial Delaware Trustee shall be:

              Wilmington Trust Company
              Rodney Square North
              1100 North Market Street
              Wilmington, Delaware 19890-0001
              Attn.: Corporate Trust Administration
              Telephone: (302) 651-1000
              Telecopier: (302) 651-8882

SECTION 5.3   Property Trustee; Eligibility.
              ----------------------------- 

              (a) There shall at all times be one Trustee (the "Property
Trustee") which shall act as Property Trustee and which shall:

                  (i)    not be an Affiliate of the Sponsor; 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 a corporation or Person permitted
          by the Commission to act as an indenture trustee under the Trust
          Indenture Act, authorized under such laws to exercise corporate trust
          powers, having a combined capital and surplus of at least 10 million
          U.S. dollars ($10,000,000), 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
          5.3(a)(ii), the combined capital and surplus of

                                       30

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

              (b) If at any time the Property Trustee shall cease to be eligible
to so act under Section 5.3(a), the Property Trustee shall immediately resign in
the manner and with the effect set forth in Section 5.6(c).

              (c) If the Property Trustee has or shall acquire any "conflicting
interest" within the meaning of (S) 330(b) of the Trust Indenture Act, the
Property Trustee and the Holder of the Common Securities (as if it were the
obligor referred to in (S) 310(b) of the Trust Indenture Act) shall in all
respects comply with the provisions of (S) 310(b) of the Trust Indenture Act.

              (d) The Capital Securities Guarantee shall be deemed to be
specifically described in this Trust Agreement for purposes of clause (i) of the
first proviso contained in (S)310 (b) of the Trust Indenture Act.

              (e) The initial Property Trustee shall be:

              Wilmington Trust Company
              Rodney Square North
              1100 North Market Street
              Wilmington, Delaware 19890-0001
              Attn.: Corporate Trust Administration
              Telephone: (302) 651-1000
              Telecopier: (302) 651-8882

SECTION 5.4   Certain Qualifications of Administrative Trustees and Delaware
              --------------------------------------------------------------
              Trustee Generally.
              ----------------- 

              Each Administrative Trustee and the Delaware Trustee (unless the
Property Trustee also acts as Delaware Trustee) shall be either a natural person
who is at least 21 years of age or a legal entity that shall act through one or
more Authorized Officers.

SECTION 5.5   Administrative Trustees.
              ----------------------- 
              The initial Administrative Trustees shall be:

              Steven C. Smith
              Shawn E. Saunders
              Mark Eschen
              c/o Greater Bay Bancorp
              2860 West Bayshore Road
              Palo Alto, California 94303
              Telephone: (650) 813-8200
              Telecopier: (650) 494-9193

                                       31

 
              (a) Except as expressly set forth in this Trust Agreement and
except if a meeting of the Administrative Trustees is called with respect to any
matter over which the Administrative Trustees have power to act, any power of
the Administrative Trustees may be exercised by, or with the consent of, any one
such Administrative Trustee.

              (b) Unless otherwise required by the applicable law, any
Administrative Trustee acting alone is authorized to execute on behalf of the
Trust any documents which the Administrative Trustees have the power and
authority to cause the Trust to execute pursuant to Section 3.6.

              (c) An Administrative Trustee may, by power of attorney consistent
with applicable law, delegate to any other natural person over the age of 21 his
or her power for the purposes of signing any documents which the Administrative
Trustees have power and authority to cause the Trust to execute pursuant to
Section 3.6.

SECTION 5.6   Appointment, Removal and Resignation of Trustees.
              ------------------------------------------------ 

              (a) Subject to Section 5.6(b) hereof and to Section 6(b) of Annex
I hereto, Trustees may be appointed or removed without cause at any time:

                  (i)    until the issuance of any Securities, by written
          instrument executed by the Sponsor;

                  (ii)   unless an Event of Default shall have occurred and be
          continuing after the issuance of any Securities, by vote of the
          Holders of a Majority in Liquidation Amount of the Common Securities
          voting as a class at a meeting of the Holders of the Common
          Securities; and

                  (iii)  if an Event of Default shall have occurred and be
          continuing after the issuance of the Securities, with respect to the
          Property Trustee or the Delaware Trustee, by vote of Holders of a
          Majority in Liquidation Amount of the Capital Securities voting as a
          class at a meeting of Holders of the Capital Securities, and with
          respect to the Administrative Trustees, in the manner set forth in
          Section 5.6(a)(ii) hereof.

              (b)   (i)  The Trustee that acts as Property Trustee shall not be
removed in accordance with Section 5.6(a) until a Successor Property Trustee has
been appointed and has accepted such appointment by written instrument executed
by such Successor Property Trustee and delivered to the removed Property
Trustee, the Administrative Trustees and the Sponsor; and

                    (ii) the Trustee that acts as Delaware Trustee shall not be
removed in accordance with this Section 5.6(a) until a successor Trustee
possessing the qualifications to act as Delaware Trustee under Sections 5.2 and
5.4 (a "Successor Delaware Trustee") has been appointed and has accepted such
appointment by written instrument executed by such Successor Delaware Trustee
and delivered to the removed Delaware Trustee, the Property Trustee (if the
removed Delaware Trustee is not also the Property Trustee), the Administrative
Trustees and the Sponsor.

                                       32

 
              (c) A Trustee appointed to office shall hold office until his
successor shall have been appointed or until his death, removal or resignation.
Any Trustee may resign from office (without need for prior or subsequent
accounting) by an instrument in writing signed by the Trustee and delivered to
the other Trustees, the Sponsor and the Trust, which resignation shall take
effect upon such delivery or upon such later date as is specified therein;
provided, however, that:
- --------  -------       

                  (i)    No such resignation of the Trustee that acts as the
          Property Trustee shall be effective:

                  (A) until a Successor Property Trustee has been appointed and
                  has accepted such appointment by instrument executed by such
                  Successor Property Trustee and delivered to the Trust, the
                  Sponsor, the Delaware Trustee (if the resigning Property
                  Trustee is not also the Delaware Trustee) and the resigning
                  Property Trustee; or

                  (B) until the assets of the Trust have been completely
                  liquidated and the proceeds thereof distributed to the
                  Holders; and

                  (ii)   no such resignation of the Trustee that acts as the
          Delaware Trustee shall be effective until a Successor Delaware Trustee
          has been appointed and has accepted such appointment by instrument
          executed by such Successor Delaware Trustee and delivered to the
          Trust, the Property Trustee (if the resigning Delaware Trustee is not
          also the Property Trustee), the Sponsor and the resigning Delaware
          Trustee.

              (d) The Holders of the Common Securities or, if an Event of
Default shall have occurred and be continuing after the issuance of the
Securities, the Holders of the Capital Securities shall use their best efforts
to promptly appoint a Successor Property Trustee or Successor Delaware Trustee,
as the case may be, if the Property Trustee or the Delaware Trustee delivers an
instrument of resignation in accordance with this Section 5.6.

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

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

                                       33

 
              (g) At the time of resignation or removal of the Property Trustee
or the Delaware Trustee, the Sponsor shall pay to such Trustee any amounts that
may be owed to such Trustee pursuant to Section 10.4.

              (h) Any successor Delaware Trustee shall file an amendment to the
Certificate of Trust with the Secretary of State of the State of Delaware
identifying the name and principal place of business of such Successor Delaware
Trustee in the State of Delaware.


SECTION 5.7   Vacancies among Trustees.
              ------------------------ 

              If a Trustee ceases to hold office for any reason and the number
of Trustees is not reduced pursuant to Section 5.l, or if the number of Trustees
is increased pursuant to Section 5.1, a vacancy shall occur. A resolution
certifying the existence of such vacancy by the Administrative Trustees or, if
there are more than two, a majority of the Administrative Trustees shall be
conclusive evidence of the existence of such vacancy. The vacancy shall be
filled with a Trustee appointed in accordance with Section 5.6.

SECTION 5.8   Effect of Vacancies.
              ------------------- 

              The death, resignation, retirement, removal, bankruptcy,
dissolution, liquidation, incompetence or incapacity to perform the duties of a
Trustee shall not operate to dissolve, liquidate or annul the Trust or to
terminate this Trust Agreement. Whenever a vacancy in the number of
Administrative Trustees shall occur, until such vacancy is filled by the
appointment of an Administrative Trustee in accordance with Section 5.6, the
Administrative Trustees in office, regardless of their number, shall have all
the powers granted to the Administrative Trustees and shall discharge all the
duties imposed upon the Administrative Trustees by this Trust Agreement.

SECTION 5.9   Meetings.
              -------- 

              If there is more than one Administrative Trustee, meetings of the
Administrative Trustees shall be held from time to time upon the call of any
Administrative Trustee. Regular meetings of the Administrative Trustees may be
held at a time and place fixed by resolution of the Administrative Trustees.
Notice of any in-person meetings of the Administrative Trustees shall be hand
delivered or otherwise delivered in writing (including by facsimile, with a hard
copy by overnight courier) not less than 24 hours before such meeting. Notice of
any telephonic meetings of the Administrative Trustees or any committee thereof
shall be hand delivered or otherwise delivered in writing (including by
facsimile, with a hard copy by overnight courier) not less than 24 hours before
a meeting. Notices shall contain a brief statement of the time, place and
anticipated purposes of the meeting. The presence (whether in person or by
telephone) of an Administrative Trustee at a meeting shall constitute a waiver
of notice of such meeting except where an Administrative Trustee attends a
meeting for the express purpose of objecting to the transaction of any activity
on the ground that the meeting has not been lawfully called or convened. Unless
provided otherwise in this Trust Agreement, any action of the Administrative
Trustees may be taken at a meeting by vote of a majority of the Administrative
Trustees present (whether in person or by telephone) and eligible to 

                                       34

 
vote with respect to such matter, provided that, a Quorum is present, or without
                                  -------- ----
a meeting by the unanimous written consent of the Administrative Trustees. In
the event there is only one Administrative Trustee, any and all action of such
Administrative Trustee shall be evidenced by a written consent of such
Administrative Trustee.

SECTION 5.10  Delegation of Power.
              ------------------- 

              (a) Any Administrative Trustee may, by power of attorney
consistent with applicable law, delegate to any other natural person over the
age of 21 his or her power for the purpose of executing any documents
contemplated in Section 3.6, including any registration statement or amendment
thereto filed with the Commission, or making any other governmental filing.

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

SECTION 5.11  Merger, Conversion, Consolidation or Succession to Business.
              ----------------------------------------------------------- 

              Any Person into which the Property Trustee or the Delaware Trustee
or any Administrative Trustee that is not a natural person, as the case may be,
may be merged or converted or with which it may be consolidated, or any Person
resulting from any merger, conversion or consolidation to which the Property
Trustee or the Delaware Trustee, as the case may be, shall be a party, or any
Person succeeding to all or substantially all the corporate trust business of
the Property Trustee or the Delaware Trustee, as the case may be, shall be the
successor of the Property Trustee or the Delaware Trustee, as the case may be,
hereunder, without the execution or filing of any paper or any further act on
the part of any of the parties hereto, provided such Person shall be otherwise
qualified and eligible under this Article and provided further that such Person
shall file an amendment to the Certificate of Trust with the Delaware Secretary
of State as contemplated in Section 5.6(h).

                                  ARTICLE VI
                                 DISTRIBUTIONS

SECTION 6.1   Distributions.
              ------------- 

              Holders shall receive Distributions in accordance with the
applicable terms of the relevant Holder's Securities. If and to the extent that
the Debenture Issuer makes a payment of interest (including Compounded Interest
and Additional Sums) and/or principal on the Debentures held by the Property
Trustee or Liquidated Damages or any other payments pursuant to the Registration
Rights Agreement or Liquidated Damages Agreement with respect to the Debentures
held by the Property Trustee (the amount of any such payment being a "Payment
Amount"), the Property Trustee shall and is directed, to the extent funds are
available for that purpose, to make a 

                                       35

 
distribution (a "Distribution") of the Payment Amount to Holders in accordance
with the terms of the Securities.

                                  ARTICLE VII
                             ISSUANCE OF SECURITIES

SECTION 7.1   General Provisions Regarding Securities.
              --------------------------------------- 

              (a) The Administrative Trustees shall, on behalf of the Trust,
issue one class of capital securities representing undivided preferred
beneficial interests in the assets of the Trust having such terms as are set
forth in Annex I (the "Series A Capital Securities") and one class of common
securities representing common undivided beneficial interests in the assets of
the Trust having such terms as are set forth in Annex I (the "Common
Securities"). The Administrative Trustees shall, on behalf of the Trust, issue
one class of capital securities representing undivided preferred beneficial
interests in the Trust having such terms as set forth in Annex I (the "Series B
Capital Securities") in exchange for the Series A Capital Securities accepted
for exchange in the Exchange Offer, which Series B Capital Securities shall not
bear the legends required by Section 9.2(i) unless the Holder of such Series A
Capital Securities is either (A) a broker-dealer who purchased such Series A
Capital Securities directly from the Trust for resale pursuant to Rule 144A or
any other available exemption under the Securities Act, (B) a Person
participating in the distribution of the Series A Capital Securities or (C) a
Person who is an Affiliate of the Sponsor or the Trust. The Trust shall issue no
securities or other interests in the assets of the Trust other than the Capital
Securities and the Common Securities.

              (b) The consideration received by the Trust for the issuance of
the Securities shall constitute a contribution to the capital of the Trust and
shall not constitute a loan to the Trust.

              (c) Upon issuance of the Securities as provided in this Trust
Agreement, the Securities so issued shall be deemed to be validly issued, fully
paid and nonassessable.

              (d) Every Person, by virtue of having become a Holder or a Capital
Security Beneficial Owner in accordance with the terms of this Trust Agreement,
shall be deemed to have expressly assented and agreed to the terms of, and shall
be bound by, this Trust Agreement.

SECTION 7.2   Execution and Authentication.
              ---------------------------- 

              (a) The Securities shall be signed on behalf of the Trust by an
Administrative Trustee. In case any Administrative Trustee of the Trust who
shall have signed any of the Securities shall cease to be such Administrative
Trustee before the Securities so signed shall be delivered by the Trust, such
Securities nevertheless may be delivered as though the Person who signed such
Securities had not ceased to be such Administrative Trustee; and any Securities
may be signed on behalf of the Trust by such persons who, at the actual date of
execution of such Security, shall be the Administrative Trustees of the Trust,
although at the date of the execution and delivery of this Trust Agreement any
such person was not an Administrative Trustee.

                                       36

 
              (b) One Administrative Trustee shall sign the Capital Securities
for the Trust by manual or facsimile signature. Unless otherwise determined by
an Administrative Trustee on behalf of the Trust, such signature shall, in the
case of Common Securities, be a manual signature.

               A Capital Security shall not be valid until authenticated by the
manual signature of an authorized signatory of the Property Trustee. The
signature shall be conclusive evidence that the Capital Security has been
authenticated under this Trust Agreement. A Common Security shall be valid upon
execution by an Administrative Trustee without any act of the Property Trustee.

               Upon a written order of the Trust signed by one Administrative
Trustee, the Property Trustee shall authenticate the Capital Securities for
original issue. The aggregate number of Capital Securities outstanding at any
time shall not exceed the number set forth in Annex I hereto except as provided
in Section 7.6.

               The Property Trustee may appoint an authenticating agent
acceptable to the Trust to authenticate Capital Securities. An authenticating
agent may authenticate Capital Securities whenever the Property Trustee may do
so. Each reference in this Trust Agreement to authentication by the Property
Trustee includes authentication by such agent. An authenticating agent has the
same rights as the Property Trustee hereunder with respect to the Sponsor or an
Affiliate.

SECTION 7.3   Form and Dating.
              --------------- 

              The Capital Securities shall be evidenced by one or more
certificates substantially in the form of Exhibit A-1, and the Common Securities
shall be evidenced by one or more certificates substantially in the form of
Exhibit A-2. The Property Trustee's certificate of authentication shall be
substantially in the form set forth in Exhibit A-1. Certificates representing
the Securities may be printed, lithographed or engraved or may be produced in
any other manner as is reasonably acceptable to an Administrative Trustee, as
evidenced by the execution thereof. The Securities may have letters, "CUSIP" or
other numbers, notations or other marks of identification or designation and
such legends or endorsements required by law, stock exchange rule, agreements to
which the Trust is subject, if any, or usage, provided that, any such notation,
                                              -------- ---- 
legend or endorsement is in a form acceptable to the Administrative Trustees, as
evidenced by their execution thereof. The Trust at the direction of the Sponsor,
shall furnish any such legend not contained in Exhibit A-1 to the Property
Trustee in writing. Each Capital Security shall be dated the date of its
authentication. The terms and provisions of the Securities set forth in Annex I
and the forms of Securities set forth in Exhibits A-1 and A-2 are part of the
terms of this Trust Agreement and, to the extent applicable, the Property
Trustee and the Sponsor, by their execution and delivery of this Trust
Agreement, expressly agree to such terms and provisions and to be bound thereby.

              (a) Global Capital Security. Capital Securities offered and sold
                  -----------------------  
to QIBs in reliance on Rule 144A, as provided in the Purchase Agreement, shall
be issued in the form of a single permanent global Capital Security in
definitive, fully registered form without distribution coupons with the
appropriate global legends and Restricted Securities Legend set forth in Exhibit
A-1 hereto (the "Global Capital Security"), which shall be deposited on behalf
of the purchasers of the Capital Securities represented thereby with the
Property Trustee, at its Corporate Trust Office, 

                                       37

 
as custodian for the Clearing Agency, and registered in the name of the Clearing
Agency or a nominee of the Clearing Agency, duly executed by the Trust and
authenticated by the Property Trustee as hereinafter provided. The number of
Capital Securities represented by the Global Capital Security may from time to
time be increased or decreased by adjustments made on the records of the
Property Trustee and the Clearing Agency or its nominee as hereinafter provided.

              (b) Book-Entry Provisions. This Section 7.3(b) shall apply only 
                  ---------------------       
to the Global Capital Security and such other Capital Securities in global form
as may be authorized by the Trust to be deposited with or on behalf of the
Clearing Agency.

              An Administrative Trustee shall execute and the Property Trustee
shall, in accordance with this Section 7.3, authenticate and make available for
delivery initially a single Global Capital Security that (i) shall be registered
in the name of Cede & Co. or other nominee of such Clearing Agency, and (ii)
shall be delivered by the Property Trustee to such Clearing Agency or pursuant
to such Clearing Agency's written instructions or, if no such written
instructions are received by the Property Trustee, held by the Property Trustee
as custodian for the Clearing Agency.

              Members of, or participants in, the Clearing Agency
("Participants") shall have no rights under this Trust Agreement with respect to
the Global Capital Security held on their behalf by the Clearing Agency or by
the Property Trustee as the custodian of the Clearing Agency or under such
Global Capital Security, and the Clearing Agency may be treated by the Trust,
the Property Trustee and any agent of the Trust or the Property Trustee as the
absolute owner of such Global Capital Security for all purposes whatsoever.
Notwithstanding the foregoing, nothing herein shall prevent the Trust, the
Property Trustee or any agent of the Trust or the Property Trustee from giving
effect to any written certification, proxy or other authorization furnished by
the Clearing Agency or impair, as between the Clearing Agency and its
Participants, the operation of customary practices of such Clearing Agency
governing the exercise of the rights of a holder of a beneficial interest in the
Global Capital Security.

              (c) Definitive Capital Securities. Except as provided in Section
                  -----------------------------  
7.9 or 9.2(f)(i), owners of beneficial interests in the Global Capital Security
will not be entitled to receive physical delivery of certificated Capital
Securities ("Definitive Capital Securities"). Purchasers of Securities who are
"accredited investors" (as defined in Rule 501(a)(1), (2), (3) or (7) under the
Securities Act) and who are not QIBs will receive Capital Securities in the form
of individual certificates in definitive, fully registered form without
distribution coupons and with the Restricted Securities Legend set forth in
Exhibit A-1 hereto ("Restricted Definitive Capital Securities"); provided,
                                                                 -------- 
however, that upon registration of transfer of such Restricted Definitive
- -------                                                                  
Capital Securities to a QIB, such Restricted Definitive Capital Securities will,
unless the Global Capital Security has previously been exchanged, be exchanged
for an interest in the Global Capital Security pursuant to the provisions of
Section 9.2. Restricted Definitive Capital Securities will bear the Restricted
Securities Legend set forth on Exhibit A-1 unless removed in accordance with
this Section 7.3 or Section 9.2.

                                       38

 
SECTION 7.4  Registrar, Paying Agent and Exchange Agent.
             ------------------------------------------ 

             The Trust shall maintain in Wilmington, Delaware (i) an office or
agency where Capital Securities may be presented for registration of transfer
("Registrar"), (ii) an office or agency where Capital Securities may be
presented for payment ("Paying Agent") and (iii) an office or agency where
Securities may be presented for exchange ("Exchange Agent"). The Registrar shall
keep a register of the Capital Securities and of their transfer. The Trust may
appoint the Registrar, the Paying Agent and the Exchange Agent and may appoint
one or more co-registrars, one or more additional paying agents and one or more
additional Exchange Agents in such other locations as it shall determine. The
term "Registrar" includes any additional registrar, the term "Paying Agent"
includes any additional paying agent and the term "Exchange Agent" includes any
additional Exchange Agent. The Trust may change any Paying Agent, Registrar, co-
registrar or Exchange Agent without prior notice to any Holder. The Paying Agent
shall be permitted to resign as Paying Agent upon 30 days' written notice to the
Property Trustee, the Administrative Trustees and the Sponsor. The Trust shall
notify the Property Trustee of the name and address of any Agent not a party to
this Trust Agreement. If the Trust fails to appoint or maintain another entity
as Registrar, Paying Agent or Exchange Agent, the Property Trustee shall act as
such. The Trust or any of its Affiliates may act as Paying Agent, Registrar, or
Exchange Agent. The Trust shall act as Paying Agent, Registrar and Exchange
Agent for the Common Securities.

              The Trust initially appoints the Property Trustee as Registrar,
Paying Agent, Exchange Agent and Calculation Agent for the Capital Securities.

              The Calculation Agent shall determine the Coupon Rate (as defined
in Annex I hereto) in accordance with the terms of the Securities.

SECTION 7.5   Paying Agent to Hold Money in Trust.
              ----------------------------------- 

              The Trust shall require each Paying Agent other than the Property
Trustee to agree in writing that the Paying Agent will hold in trust for the
benefit of Holders or the Property Trustee all money held by the Paying Agent
for the payment of liquidation amounts or Distributions, and will notify the
Property Trustee if there are insufficient funds for such purpose. While any
such insufficiency continues, the Property Trustee may require a Paying Agent to
pay all money held by it to the Property Trustee. The Trust at any time may
require a Paying Agent to pay all money held by it to the Property Trustee and
to account for any money disbursed by it. Upon payment over to the Property
Trustee, the Paying Agent (if other than the Trust or an Affiliate of the Trust)
shall have no further liability for the money. If the Trust or the Sponsor or an
Affiliate of the Trust or the Sponsor acts as Paying Agent, it shall segregate
and hold in a separate trust fund for the benefit of the Holders all money held
by it as Paying Agent.

SECTION 7.6   Replacement Securities.
              ---------------------- 

              If a Holder claims that a Security owned by it has been lost,
destroyed or wrongfully taken or if such Security is mutilated and is
surrendered to the Trust or in the case of the Capital Securities to the
Property 

                                       39

 
Trustee, an Administrative Trustee shall execute and the Property Trustee shall
authenticate and make available for delivery a replacement Security if the
Property Trustee's requirements are met. An indemnity bond must be provided by
the Holder which, in the judgment of the Property Trustee, is sufficient to
protect the Trustees, the Sponsor, the Trust or any authenticating agent from
any loss which any of them may suffer if a Security is replaced. The Trust may
charge such Holder for its expenses in replacing a Security.

SECTION 7.7   Outstanding Capital Securities.
              ------------------------------ 

              The Capital Securities outstanding at any time are all the Capital
Securities authenticated by the Property Trustee except for those cancelled by
it, those delivered to it for cancellation, and those described in this Section
as not outstanding.

              If a Capital Security is replaced, paid or purchased pursuant to
Section 7.6 hereof, it ceases to be outstanding unless the Property Trustee
receives proof satisfactory to it that the replaced, paid or purchased Capital
Security is held by a bona fide purchaser.

              If Capital Securities are considered paid in accordance with the
terms of this Trust Agreement, they cease to be outstanding and Distributions on
them shall cease to accumulate.

              A Capital Security does not cease to be outstanding because one of
the Trust, the Sponsor or an Affiliate of the Sponsor holds the Security.

SECTION 7.8   Capital Securities in Treasury.
              ------------------------------ 

              In determining whether the Holders of the required amount of
Securities have concurred in any direction, waiver or consent, Capital
Securities owned by the Trust, the Sponsor or an Affiliate of the Sponsor, as
the case may be, shall be disregarded and deemed not to be outstanding, except
that for the purposes of determining whether the Property Trustee shall be fully
protected in relying on any such direction, waiver or consent, only Securities
which the Property Trustee actually knows are so owned shall be so disregarded.

SECTION 7.9   Temporary Securities.
              -------------------- 

              (a) Until Definitive Capital Securities are ready for delivery,
the Trust may prepare and, in the case of the Capital Securities, the Property
Trustee shall authenticate temporary Securities. Temporary Securities shall be
substantially in the form of Definitive Capital Securities but may have
variations that the Trust considers appropriate for temporary Securities.
Without unreasonable delay, the Trust shall prepare and, in the case of the
Capital Securities, the Property Trustee shall authenticate Definitive Capital
Securities in exchange for temporary Securities.

              (b) The Global Capital Security deposited with the Clearing Agency
or with the Property Trustee as custodian for the Clearing Agency pursuant to
Section 7.3 shall be transferred to the beneficial owners thereof in the form of
Definitive Capital Securities only if such transfer complies with Section 9.2
and (i) the Clearing Agency notifies the Sponsor that it is unwilling or unable
to continue as Clearing Agency for such Global Capital Security or if at any
time such 

                                       40

 
Clearing Agency ceases to be a "clearing agency" registered under the Exchange
Act, and, in each case, a clearing agency is not appointed by the Sponsor within
90 days of receipt of such notice or of becoming aware of such condition, (ii) a
Default or an Event of Default has occurred and is continuing, or (iii) the
Trust at its sole discretion elects to cause the issuance of Definitive Capital
Securities.

              (c) Any Global Capital Security that is transferable to the
beneficial owners thereof in the form of Definitive Capital Securities pursuant
to this Section 7.9 shall be surrendered by the Clearing Agency to the Property
Trustee to be so transferred, in whole or from time to time in part, without
charge, and the Property Trustee shall authenticate and make available for
delivery, upon such transfer of each portion of such Global Capital Security, an
equal aggregate liquidation amount of Capital Securities of authorized
denominations in the form of Definitive Capital Securities. Any portion of the
Global Capital Security transferred pursuant to this Section shall be registered
in such names as the Clearing Agency shall direct. Any Definitive Capital
Security delivered in exchange for an interest in the Restricted Global Capital
Security shall, except as otherwise provided by Sections 7.3 and 9.1, bear the
Restricted Securities Legend set forth in Exhibit A-l hereto.

              (d) Subject to the provisions of Section 7.9(c), the Holder of the
Global Capital Security may grant proxies and otherwise authorize any Person,
including Participants and Persons that may hold interests through Participants,
to take any action which such Holder is entitled to take under this Trust
Agreement or the Securities.

              (e) In the event of the occurrence of any of the events specified
in Section 7.9(b), the Trust will promptly make available to the Property
Trustee a reasonable supply of certificated Capital Securities in fully
registered form without distribution coupons.

SECTION 7.10  Cancellation.
              ------------ 

              The Trust at any time may deliver Capital Securities to the
Property Trustee for cancellation. The Registrar, Paying Agent and Exchange
Agent shall forward to the Property Trustee any Capital Securities surrendered
to them for registration of transfer, redemption, exchange or payment. The
Property Trustee shall promptly cancel all Capital Securities surrendered for
registration of transfer, redemption, exchange, payment, replacement or
cancellation and shall dispose of cancelled Capital Securities in accordance
with its customary procedures unless the Trust otherwise directs. The Trust may
not issue new Capital Securities to replace Capital Securities that it has paid
or that have been delivered to the Property Trustee for cancellation or that any
Holder has exchanged.

SECTION 7.11  CUSIP Numbers.
              ------------- 

              The Trust in issuing the Capital Securities may use "CUSIP"
numbers (if then generally in use), and, if so, the Property Trustee shall use
"CUSIP" numbers in notices of redemption as a convenience to Holders of Capital
Securities; provided that, any such notice may state that no representation is
            -------- ----                                                     
made as to the correctness of such numbers either as printed on the 

                                       41

Capital 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
Capital Securities, and any such redemption shall not be affected by any defect
in or omission of such numbers. The Sponsor will promptly notify the Property
Trustee of any change in the CUSIP numbers.

                                 ARTICLE VIII
                             DISSOLUTION OF TRUST

SECTION 8.1   Dissolution of Trust.
              -------------------- 

              (a) The Trust shall dissolve:

                  (i)    upon the bankruptcy of the Sponsor;

                  (ii)   upon the filing of a certificate of dissolution or
          liquidation or its equivalent with respect to the Sponsor; or the
          revocation of the Sponsor's charter and the expiration of 90 days
          after the date of revocation without a reinstatement thereof;

                  (iii)  following the distribution of a Like Amount of the
          Debentures to the Holders, provided that, the Property Trustee has
                                     -------------  
          received written notice from the Sponsor directing the Property
          Trustee to dissolve the Trust (which direction is optional, and except
          as otherwise expressly provided below, within the discretion of the
          Sponsor), and provided, further, that such direction and such
                        --------  -------                              
          distribution is conditioned on (a) the receipt by the Sponsor of any
          and all required regulatory approvals, and (b) the Sponsor's receipt
          and delivery to the Administrative Trustees of an opinion of
          independent tax counsel experienced in such matters, which opinion may
          rely on public or private rulings of the Internal Revenue Service, to
          the effect that the Holders of the Capital Securities will not
          recognize any gain or loss for United States federal income tax
          purposes as a result of the dissolution of the Trust and the
          distribution of Debentures;

                  (iv)   upon the entry of a decree of judicial dissolution of
          the Trust by a court of competent jurisdiction;

                  (v)    when all of the Securities shall have been called for
          redemption and the amounts necessary for redemption thereof shall have
          been paid to the Holders in accordance with the terms of the
          Securities;

                  (vi)   upon the redemption or repayment of the Debentures or
          at such time as no Debentures are outstanding; or

                  (vii)  the expiration of the term of the Trust provided in
          Section 3.14.

                                       42

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

              (c) The provisions of Section 3.9 and Article X shall survive the
dissolution of the Trust.



                                  ARTICLE IX
                             TRANSFER OF INTERESTS

SECTION 9.1   Transfer of Securities.
              ---------------------- 

              (a) Securities may only be transferred, in whole or in part, in
accordance with the terms and conditions set forth in this Trust Agreement and
in the terms of the Securities.  To the fullest extent permitted by law, any
transfer or purported transfer of any Security not made in accordance with this
Trust Agreement shall be null and void.

              (b) Subject to this Article IX, Capital Securities may only be
transferred, in whole or in part, in accordance with the terms and conditions
set forth in this Trust Agreement. To the fullest extent permitted by law, any
transfer or purported transfer of any Security not made in accordance with this
Trust Agreement shall be null and void.

              (c) For so long as the Securities remain outstanding, the Sponsor
agrees (i) not to transfer ownership of the Common Securities of the Trust,
provided that any permitted successor of the Sponsor under the Indenture may
succeed to the Sponsor's ownership of the Common Securities, (ii) not to cause,
as Sponsor of the Trust, or to permit, as Holder of the Common Securities, the
dissolution, winding-up or liquidation of the Trust, except as provided in this
Trust Agreement and (iii) to use its best efforts to cause the Trust (a) to
remain a business trust, except in connection with the distribution of
Debentures to the Holders in liquidation of the Trust, the redemption of all of
the Securities, or certain mergers, consolidations or amalgamations, each as
permitted by this Trust Agreement, and (b) to otherwise continue to be
classified as a grantor trust for United States federal income tax purposes.

              (d) The Registrar shall provide for the registration of Capital
Securities and of the transfer of Capital Securities, which will be effected
without charge but only upon payment (with such indemnity as the Registrar may
require) in respect of any tax or other governmental charges that may be imposed
in relation to it. Upon surrender for registration of transfer of any Capital
Securities, an Administrative Trustee shall cause one or more new Capital
Securities to be issued in the name of the designated transferee or transferees.
Every Capital Security surrendered for registration of transfer shall be
accompanied by a written instrument of transfer in form satisfactory to the
Registrar duly executed by the Holder or such Holder's attorney duly authorized
in writing. Each Capital Security surrendered for registration of transfer shall
be delivered to the Registrar and canceled in 

                                       43

 
accordance with Section 7.10. A transferee of a Capital Security shall be
entitled to the rights and subject to the obligations of a Holder hereunder upon
the receipt by such transferee of a Capital Security. By acceptance of a Capital
Security or any interest therein, each transferee shall be deemed to have agreed
to be bound by this Trust Agreement.

SECTION 9.2   Transfer Procedures and Restrictions.
              ------------------------------------ 

              (a) General. Except as otherwise provided in Section 9.2(b), if
                  -------                                                    
Capital Securities are issued upon the transfer, exchange or replacement of
Capital Securities bearing the Restricted Securities Legend set forth in Exhibit
A-1 hereto, or if a request is made to remove such Restricted Securities Legend
on Capital Securities, the Capital Securities so issued shall bear the
Restricted Securities Legend, or the Restricted Securities Legend shall not be
removed, as the case may be, unless there is delivered to the Trust and the
Property Trustee such satisfactory evidence, which shall include an Opinion of
Counsel, as may be reasonably required by the Trust and the Property Trustee,
that neither the Restricted Securities Legend nor the restrictions on transfer
set forth therein are required to ensure that transfers thereof are made
pursuant to an exception from the registration requirements of the Securities
Act or, with respect to Restricted Capital Securities, that such Securities are
not "restricted" within the meaning of Rule 144. Upon provision of such
satisfactory evidence, the Property Trustee, at the written direction of an
Administrative Trustee on behalf of the Trust, shall authenticate and deliver
Capital Securities that do not bear the legend.

              (b) Transfers After Effectiveness of a Registration Statement. 
                  --------------------------------------------------------- 
After the effectiveness of a Registration Statement with respect to any Capital
Securities, all requirements pertaining to legends on such Capital Securities
will cease to apply (other than the legend requiring that transfers of Capital
Securities be made in blocks having an aggregate liquidation amount of not less
than $100,000 (100 Capital Securities) and multiples of $1,000 in excess
thereof), and beneficial interests in the Global Capital Security without
legends will be available to transferees of such Capital Securities, upon
exchange of the transferring Holder's Restricted Definitive Capital Security or
directions to transfer such Holder's beneficial interest in the Global Capital
Security, as the case may be. No such transfer or exchange of a Restricted
Definitive Capital Security or of an interest in the Global Capital Security
shall be effective unless the transferor delivers to the Property Trustee a
certificate in a form substantially similar to that attached hereto as the form
of "Assignment" in Exhibit A-1. Except as otherwise provided in Section 9.2(m),
after the effectiveness of a Registration Statement, an Administrative Trustee
on behalf of the Trust shall issue and the Property Trustee, upon a written
order of the Trust signed by one Administrative Trustee, shall authenticate a
Global Capital Security without the Restricted Securities Legend (the
"Unrestricted Global Capital Security") to deposit with the Clearing Agency to
evidence transfers of beneficial interests from the (i) Global Capital Security
and (ii) Restricted Definitive Capital Securities.

              (c) Transfer and Exchange of Definitive Capital Securities. When
                  ------------------------------------------------------      
Definitive Capital Securities are presented to the Registrar or co-registrar:

              (x) to register the transfer of such Definitive Capital
Securities; or

                                       44

 
              (y) to exchange such Definitive Capital Securities which became
     mutilated, destroyed, defaced, stolen or lost, for an equal number of
     Definitive Capital Securities, the Registrar or co-registrar shall register
     the transfer or make the exchange as requested if its reasonable
     requirements for such transaction are met;

     provided, however, that the Definitive Capital Securities surrendered for
     --------  -------                                                        
     registration of transfer or exchange:

                  (i)    shall be duly endorsed or accompanied by a written
          instrument of transfer in form reasonably satisfactory to the Trust
          and the Registrar or co-registrar, duly executed by the Holder thereof
          or his attorney duly authorized in writing; and

                  (ii)   in the case of Definitive Capital Securities that are
          Restricted Definitive Capital Securities:

                  (A) if such Restricted Capital Securities are being delivered
                  to the Registrar by a Holder for registration in the name of
                  such Holder, without transfer, certification(s) from such
                  Holder to that effect; or

                  (B) if such Restricted Capital Securities are being
                  transferred: (i) certification(s) in a form substantially
                  similar to that attached hereto as the form of "Assignment" in
                  Exhibit A-1, and (ii) if the Trust or Registrar so requests,
                  evidence reasonably satisfactory to them as to the compliance
                  with the restrictions set forth in the Restricted Securities
                  Legend.

              (d) Restrictions on Transfer of a Definitive Capital Security 
                  ---------------------------------------------------------
for a Beneficial Interest in the Global Capital Security. A Definitive Capital
- --------------------------------------------------------                      
Security may not be exchanged for a beneficial interest in the Global Capital
Security except upon satisfaction of the requirements set forth below. Upon
receipt by the Property Trustee of a Definitive Capital Security, duly endorsed
or accompanied by appropriate instruments of transfer, in form satisfactory to
the Property Trustee, together with:

                  (i)    if such Definitive Capital Security is a Restricted
          Capital Security, certification(s) in a form substantially similar to
          that attached hereto as the form of "Assignment" in Exhibit A-1; and

                  (ii)   whether or not such Definitive Capital Security is a
          Restricted Capital Security, written instructions directing the
          Property Trustee to make, or to direct the Clearing Agency to make, an
          adjustment on its books and records with respect to the Global Capital
          Security to reflect an increase in the number of the Capital
          Securities represented by such Global Capital Security,

then the Property Trustee shall cancel such Definitive Capital Security and
cause, or direct the Clearing Agency to cause, the aggregate number of Capital
Securities represented by the Global 

                                       45

 
Capital Security to be increased accordingly. If the Global Capital Security is
not then outstanding, an Administrative Trustee on behalf of the Trust shall
issue and the Property Trustee shall authenticate, upon written order of any
Administrative Trustee, a new Global Capital Security representing an
appropriate number of Capital Securities.

              (e) Transfer and Exchange of the Global Capital Security. 
                  ----------------------------------------------------  
Subject to Section 9.2(f), the transfer and exchange of Global Capital Security
or beneficial interests therein shall be effected through the Clearing Agency in
accordance with this Trust Agreement (including applicable restrictions on
transfer set forth herein, if any) and the procedures of the Clearing Agency
therefor.

              (f) Transfer of a Beneficial Interest in the Global Capital 
                  -------------------------------------------------------
Security for a Definitive Capital Security.
- ------------------------------------------ 

                  (i)    Any Person having a beneficial interest in the Global
          Capital Security may upon request, but only upon 20 days prior notice
          to the Property Trustee, and if accompanied by the information
          specified below, exchange such beneficial interest for a Definitive
          Capital Security representing the same number of Capital Securities.
          Upon receipt by the Property Trustee from the Clearing Agency or its
          nominee on behalf of any Person having a beneficial interest in the
          Global Capital Security of written instructions or such other form of
          instructions as is customary for the Clearing Agency or the Person
          designated by the Clearing Agency as having such a beneficial interest
          in a Restricted Capital Security and certification(s) from the
          transferor in a form substantially similar to that attached hereto as
          the form of "Assignment" in Exhibit A-1, which may be submitted by
          facsimile, then the Property Trustee will cause the aggregate number
          of Capital Securities represented by the Global Capital Security to be
          reduced on its books and records and, following such reduction, the
          Trust will execute and the Property Trustee will authenticate and make
          available for delivery to the transferee a Definitive Capital
          Security.

                  (ii)   Definitive Capital Securities issued in exchange for a
          beneficial interest in the Global Capital Security pursuant to this
          Section 9.2(f) shall be registered in such names and in such
          authorized denominations as the Clearing Agency, pursuant to
          instructions from its Clearing Agency Participants or indirect
          participants or otherwise, shall instruct the Property Trustee in
          writing. The Property Trustee shall deliver such Capital Securities to
          the Persons in whose names such Capital Securities are so registered
          in accordance with such instructions of the Clearing Agency.

              (g) Restrictions on Transfer and Exchange of the Global Capital
                  -----------------------------------------------------------
Security. Notwithstanding any other provisions of this Trust Agreement (other
- --------                                                                     
than the provisions set forth in subsection (h) of this Section 9.2), the Global
Capital Security may not be transferred as a whole except by the Clearing Agency
to a nominee of the Clearing Agency or another nominee of the Clearing Agency or
by the Clearing Agency or any such nominee to a successor Clearing Agency or a
nominee of such successor Clearing Agency.

                                       46

 
              (h) Authentication of Definitive Capital Securities. If at any 
                  -----------------------------------------------  
time:

                  (i)    a Default or an Event of Default has occurred and is
continuing,

                  (ii)   the Trust, in its sole discretion, notifies the
          Property Trustee in writing that it elects to cause the issuance of
          Definitive Capital Securities under this Trust Agreement, or

                  (iii)  the Clearing Agency notifies the Sponsor that it is
          unwilling or unable to continue as Clearing Agency for such Global
          Capital Security or if at any time such Clearing Agency ceases to be a
          "clearing agency" registered under the Exchange Act, and, in each
          case, a clearing agency is not appointed by the Sponsor within 90 days
          of receipt of such notice or of becoming aware of such condition,

then an Administrative Trustee on behalf of the Trust will execute, and the
Property Trustee, upon receipt of a written order of the Trust signed by one
Administrative Trustee requesting the authentication and delivery of Definitive
Capital Securities to the Persons designated by the Trust, will authenticate and
make available for delivery Definitive Capital Securities, equal in number to
the number of Capital Securities represented by the Global Capital Security, in
exchange for such Global Capital Security.

              (i) Legend.
                  ------ 

                  (i)    Except as permitted by the following paragraph (ii),
              each Capital Security Certificate evidencing the Global Capital
              Security and each Definitive Capital Security (and all Capital
              Securities issued in exchange therefor or substitution thereof)
              shall bear a legend (the "Restricted Securities Legend") in
              substantially the following form:

              THIS CAPITAL SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES
              ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
              SECURITIES LAWS OR ANY OTHER APPLICABLE SECURITIES LAW. NEITHER
              THIS CAPITAL 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,
              REGISTRATION.

                                       47

 
              THE HOLDER OF THIS CAPITAL SECURITY BY ITS ACCEPTANCE HEREOF
              AGREES TO OFFER, SELL OR OTHERWISE TRANSFER THIS CAPITAL SECURITY,
              PRIOR TO THE DATE (THE "RESALE RESTRICTION TERMINATION DATE")
              WHICH IS TWO YEARS AFTER THE LATER OF THE ORIGINAL ISSUANCE DATE
              HEREOF AND THE LAST DATE ON WHICH GREATER BAY BANCORP (THE
              "CORPORATION") OR ANY "AFFILIATE" OF THE CORPORATION WAS THE OWNER
              OF THIS CAPITAL SECURITY (OR ANY PREDECESSOR OF THIS CAPITAL
              SECURITY) ONLY (A) TO THE CORPORATION, (B) PURSUANT TO A
              REGISTRATION STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE UNDER THE
              SECURITIES ACT, (C) SO LONG AS THIS CAPITAL SECURITY IS ELIGIBLE
              FOR RESALE 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, (D) TO AN INSTITUTIONAL "ACCREDITED
              INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH (A)(1), (2), (3) OR
              (7) OF RULE 501 UNDER THE SECURITIES ACT THAT IS ACQUIRING THIS
              CAPITAL SECURITY FOR ITS OWN ACCOUNT, OR FOR THE ACCOUNT OF SUCH
              AN INSTITUTIONAL 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 (E) PURSUANT TO
              ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS
              UNDER THE SECURITIES ACT, SUBJECT TO THE RIGHT OF GBB CAPITAL II
              (THE "TRUST") AND THE CORPORATION PRIOR TO ANY SUCH OFFER, SALE OR
              TRANSFER (i) PURSUANT TO CLAUSE (D) OR (E) TO REQUIRE THE DELIVERY
              OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR OTHER INFORMATION
              SATISFACTORY TO EACH OF THEM, AND (ii) PURSUANT TO CLAUSE (D) TO
              REQUIRE THAT THE TRANSFEROR DELIVER TO THE TRUST A LETTER FROM THE
              TRANSFEREE 

                                       48

 
              SUBSTANTIALLY IN THE FORM OF ANNEX A TO THE OFFERING MEMORANDUM
              DATED AUGUST 7, 1998. SUCH HOLDER FURTHER AGREES THAT IT WILL
              DELIVER TO EACH PERSON TO WHOM THIS CAPITAL SECURITY IS
              TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.

              THE HOLDER OF THIS CAPITAL SECURITY BY ITS ACCEPTANCE HEREOF ALSO
              AGREES, REPRESENTS AND WARRANTS THAT IT IS NOT AN EMPLOYEE
              BENEFIT, INDIVIDUAL RETIREMENT ACCOUNT OR OTHER PLAN OR
              ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME
              SECURITY ACT OF 1974, AS AMENDED ("ERISA"), OR SECTION 4975 OF THE
              INTERNAL REVENUE CODE OF 1986, AS AMENDED, (THE "CODE") (EACH A
              "PLAN"), OR AN ENTITY WHOSE UNDERLYING ASSETS INCLUDE "PLAN
              ASSETS" BY REASON OF ANY PLAN'S INVESTMENT IN THE ENTITY AND NO
              PERSON INVESTING "PLAN ASSETS" OF ANY PLAN MAY ACQUIRE OR HOLD THE
              CAPITAL SECURITIES OR ANY INTEREST THEREIN, UNLESS SUCH PURCHASER
              OR HOLDER IS ELIGIBLE FOR THE EXEMPTIVE RELIEF AVAILABLE UNDER
              U.S. DEPARTMENT OF LABOR PROHIBITED TRANSACTION CLASS EXEMPTION 
              96-23, 95-60, 91-38, 90-1 OR 84-14 OR ANOTHER APPLICABLE EXEMPTION
              OR ITS PURCHASE AND HOLDING OF CAPITAL SECURITIES IS NOT
              PROHIBITED BY SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE
              WITH RESPECT TO SUCH PURCHASE OR HOLDING. ANY PURCHASER OR HOLDER
              OF THE CAPITAL SECURITIES OR ANY INTEREST THEREIN WILL BE DEEMED
              TO HAVE REPRESENTED BY ITS PURCHASE AND HOLDING THEREOF THAT
              EITHER (i) IT IS NOT AN EMPLOYEE BENEFIT PLAN WITHIN THE MEANING
              OF SECTION 3(3) OF ERISA, OR A PLAN TO WHICH SECTION 4975 OF THE
              CODE IS APPLICABLE, A TRUSTEE OR OTHER PERSON ACTING ON BEHALF OF
              AN EMPLOYEE BENEFIT PLAN OR PLAN, OR ANY OTHER PERSON OR ENTITY
              USING THE ASSETS OF ANY EMPLOYEE BENEFIT PLAN OR PLAN TO FINANCE
              SUCH PURCHASE, OR (ii) SUCH PURCHASE WILL NOT RESULT IN A
              PROHIBITED TRANSACTION UNDER SECTION 406 OF

                                       49

 
              ERISA OR SECTION 4975 OF THE CODE FOR WHICH THERE IS NO APPLICABLE
              STATUTORY OR ADMINISTRATIVE EXEMPTION.

In all circumstances, each Capital Security Certificate shall bear the following
legend:

              THE CAPITAL SECURITIES WILL BE ISSUED AND MAY BE TRANSFERRED ONLY
              IN BLOCKS HAVING A LIQUIDATION AMOUNT OF NOT LESS THAN $100,000
              (100 CAPITAL SECURITIES) AND MULTIPLES OF $1,000 IN EXCESS
              THEREOF. ANY ATTEMPTED TRANSFER OF CAPITAL SECURITIES IN A BLOCK
              HAVING A LIQUIDATION AMOUNT OF LESS THAN $100,000 (100 CAPITAL
              SECURITIES) SHALL BE DEEMED TO BE VOID AND OF NO LEGAL EFFECT
              WHATSOEVER. ANY SUCH PURPORTED TRANSFEREE SHALL BE DEEMED NOT TO
              BE THE HOLDER OF SUCH CAPITAL SECURITIES FOR ANY PURPOSE,
              INCLUDING, BUT NOT LIMITED TO, THE RECEIPT OF DISTRIBUTIONS ON
              SUCH CAPITAL SECURITIES, AND SUCH PURPORTED TRANSFEREE SHALL BE
              DEEMED TO HAVE NO INTEREST WHATSOEVER IN SUCH CAPITAL SECURITIES.

                  (ii)   Upon any sale or transfer of a Restricted Capital
          Security (including any Restricted Capital Security represented by the
          Global Capital Security) pursuant to an effective registration
          statement under the Securities Act or pursuant to Rule 144:

                  (A) in the case of any Restricted Capital Security that is a
                  Definitive Capital Security, the Registrar shall permit the
                  Holder thereof to exchange such Restricted Capital Security
                  for a Definitive Capital Security that does not bear the
                  Restricted Securities Legend and rescind any restriction on
                  the transfer of such Restricted Capital Security; and

                  (B) in the case of any Restricted Capital Security that is
                  represented by the Global Capital Security, the Registrar
                  shall permit the Holder of such Global Capital Security to
                  exchange such Global Capital Security for another Global
                  Capital Security that does not bear the Restricted Securities
                  Legend.

              (j) Cancellation or Adjustment of Global Capital Security. At such
                  -----------------------------------------------------         
time as all beneficial interests in the Global Capital Security have either been
exchanged for Definitive Capital Securities to the extent permitted by this
Trust Agreement or redeemed, repurchased or canceled in accordance with the
terms of this Trust Agreement, such Global Capital Security shall be returned 

                                       50

 
to the Clearing Agency for cancellation or retained and canceled by the Property
Trustee. At any time prior to such cancellation, if any beneficial interest in
the Global Capital Security is exchanged for Definitive Capital Securities,
Capital Securities represented by such Global Capital Security shall be reduced
and an adjustment shall be made on the books and records of the Property Trustee
and the Clearing Agency or its nominee to reflect such reduction.

              (k) Obligations with Respect to Transfers and Exchanges of Capital
                  --------------------------------------------------------------
Securities.
- ---------- 

                  (i)    To permit registrations of transfers and exchanges, the
          Trust shall execute and the Property Trustee shall authenticate
          Definitive Capital Securities and the Global Capital Security at the
          Registrar's or co-registrar's request in accordance with the terms of
          this Trust Agreement.

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

                  (iii)  The Registrar or co-registrar shall not be required to
          register the transfer of or exchange of (a) Capital Securities during
          a period beginning at the opening of business 15 days before the day
          of mailing of a notice of redemption or any notice of selection of
          Capital Securities for redemption and ending at the close of business
          on the day of such mailing or (b) any Capital Security so selected for
          redemption in whole or in part, except the unredeemed portion of any
          Capital Security being redeemed in part.

                  (iv)   Prior to the due presentation for registration of
          transfer of any Capital Security, the Trust, the Property Trustee, the
          Paying Agent, the Registrar or any co-registrar may deem and treat the
          Person in whose name a Capital Security is registered as the absolute
          owner of such Capital Security for the purpose of receiving
          Distributions on such Capital Security and for all other purposes
          whatsoever, and none of the Trust, the Property Trustee, the Paying
          Agent, the Registrar or any co-registrar shall be affected by notice
          to the contrary.

                  (v)    All Capital Securities issued upon any registration of
          transfer or exchange pursuant to the terms of this Trust Agreement
          shall evidence the same security and shall be entitled to the same
          benefits under this Trust Agreement as the Capital Securities
          surrendered upon such registration of transfer or exchange.

              (l) No Obligation of the Property Trustee.
                  ------------------------------------- 

                  (i)    The Property Trustee shall have no responsibility or
          obligation to any Capital Security Beneficial Owner, a Participant in
          the Clearing Agency or other Person with respect to the accuracy of
          the records of the Clearing Agency or its nominee or of any
          Participant thereof, with respect to any ownership interest in 

                                       51

 
          the Capital Securities or with respect to the delivery to any
          Participant, beneficial owner or other Person (other than the Clearing
          Agency) of any notice (including any notice of redemption) or the
          payment of any amount, under or with respect to such Capital
          Securities. All notices and communications to be given to the Holders
          and all payments to be made to Holders under the Capital Securities
          shall be given or made only to or upon the order of the registered
          Holders (which shall be the Clearing Agency or its nominee in the case
          of the Global Capital Security). The rights of Capital Security
          Beneficial Owners shall be exercised only through the Clearing Agency
          subject to the applicable rules and procedures of the Clearing Agency.
          The Property Trustee may conclusively rely and shall be fully
          protected in relying upon information furnished by the Clearing Agency
          or any agent thereof with respect to its Participants and any Capital
          Security Beneficial Owners.

                  (ii)   The Property Trustee and the Registrar shall have no
          obligation or duty to monitor, determine or inquire as to compliance
          with any restrictions on transfer imposed under this Trust Agreement
          or under applicable law with respect to any transfer of any interest
          in any Capital Security (including any transfers between or among
          Clearing Agency Participants or Capital Security Beneficial Owners)
          other than to require delivery of such certificates and other
          documentation or evidence as are expressly required by, and to do so
          if and when expressly required by, the terms of this Trust Agreement,
          and to examine the same to determine substantial compliance as to form
          with the express requirements hereof.

              (m) Exchange of Series A Capital Securities for Series B Capital
                  ------------------------------------------------------------
Securities. The Series A Capital Securities shall be exchanged for Series B
- ----------                                                                 
Capital Securities pursuant to the terms of the Exchange Offer if the following
conditions are satisfied:

              The Sponsor shall present the Property Trustee with an Officers'
Certificate certifying the following:

              (A) upon issuance of the Series B Capital Securities, the
              transactions contemplated by the Exchange Offer have been
              consummated; and

              (B) the number of Series A Capital Securities properly tendered in
              the Exchange Offer that are represented by the Global Capital
              Security and the number of Series A Capital Securities properly
              tendered in the Exchange Offer that are represented by Definitive
              Capital Securities, the name of each Holder of such Definitive
              Capital Securities, the liquidation amount of Capital Securities
              properly tendered in the Exchange Offer by each such Holder and
              the name and address to which Definitive Capital Securities for
              Series B Capital Securities shall be registered and sent for each
              such Holder.

                                       52

 
              The Property Trustee, upon receipt of (i) such Officers'
Certificate, (ii) an Opinion of Counsel (x) to the effect that the Series B
Capital Securities and the Series B Capital Securities Guarantee have been
registered under Section 5 of the Securities Act and that this Trust Agreement
and the Series B Capital Securities Guarantee have been qualified under the
Trust Indenture Act and (y) with respect to the matters set forth in Section
3(q) of the Registration Rights Agreement, shall authenticate (A) the Global
Capital Security, executed and delivered by the Trust to the Property Trustee,
for Series B Capital Securities in aggregate liquidation amount equal to the
aggregate liquidation amount of Series A Capital Securities represented by the
Global Capital Security indicated in such Officers' Certificate as having been
properly tendered and (B) Definitive Capital Securities, executed and delivered
by the Trust to the Property Trustee, representing Series B Capital Securities
registered in the names and in the liquidation amounts indicated in such
Officers' Certificate.

              If, upon consummation of the Exchange Offer, less than all the
outstanding Series A Capital Securities shall have been properly tendered and
not withdrawn, the Property Trustee shall make an endorsement on the Global
Capital Security for Series A Capital Securities indicating the reduction in the
number and aggregate liquidation amount represented thereby as a result of the
Exchange Offer.

              The Trust shall deliver such authenticated Definitive Capital
Securities for Series B Capital Securities to the Holders thereof as indicated
in such Officers' Certificate.

              (n) Minimum Transfers. Series A Capital Securities and, if and 
                  -----------------  
when issued, Series B Capital Securities may only be transferred in minimum
blocks of $100,000 aggregate liquidation amount (100 Capital Securities) and
multiples of $1,000 in excess thereof. Any attempted transfer of Series A
Capital Securities or Series B Capital Securities in a block having an aggregate
liquidation amount of less than $100,000 shall be deemed to be voided and of no
legal effect whatsoever. Any such purported transferee shall be deemed not to be
a Holder of such Series A Capital Securities or Series B Capital Securities for
any purpose, including, but not limited to, the receipt of Distributions on such
Capital Securities, and such purported transferee shall be deemed to have no
interest whatsoever in such Capital Securities.

SECTION 9.3   Deemed Security Holders.
              ----------------------- 

              The Trustees may treat the Person in whose name any Security shall
be registered on the books and records of the Trust as the sole owner and Holder
of such Security for purposes of receiving Distributions and for all other
purposes whatsoever and, accordingly, shall not be bound to recognize any
equitable or other claim to or interest in such Security on the part of any
Person, whether or not the Trust shall have actual or other notice thereof.

SECTION 9.4   Book-Entry Interests.
              -------------------- 

              The Global Capital Security shall initially be registered on the
books and records of the Trust in the name of Cede & Co., the nominee of the
Clearing Agency and no Capital Security Beneficial Owner will receive physical
delivery of a definitive Capital Security certificate (a "Capital

                                       53

 
Security Certificate") representing such Capital Security Beneficial Owner's
interests in such Global Capital Security, except as provided in Section 9.2 and
Section 7.9. Unless and until Definitive Capital Securities have been issued to
the Capital Security Beneficial Owners pursuant to Section 9.2 or Section 7.9:

              (a) the provisions of this Section 9.4 shall be in full force and
effect;

              (b) the Trust and the Trustees shall be entitled to deal with the
Clearing Agency for all purposes of this Trust Agreement (including the payment
of Distributions on the Global Capital Security and receiving approvals, votes
or consents hereunder) as the sole Holder of the Global Capital Security and
shall have no obligation to the Capital Security Beneficial Owners;

              (c) to the extent that the provisions of this Section 9.4 conflict
with any other provisions of this Trust Agreement, the provisions of this
Section 9.4 shall control; and

              (d) the rights of the Capital Security Beneficial Owners shall be
exercised only through the Clearing Agency and shall be limited to those
established by law and agreements between such Capital Security Beneficial
Owners and the Clearing Agency and/or the Clearing Agency Participants, and the
Clearing Agency shall receive and transmit payments of Distributions on the
Global Capital Security to such Clearing Agency Participants; provided, however,
                                                              --------  ------- 
that solely for the purposes of determining whether the Holders of the requisite
amount of Capital Securities have voted on any matter provided for in this Trust
Agreement, the Trustees, with respect to the Global Capital Security, may
conclusively rely on, and shall be protected in relying on, any written
instrument (including a proxy) delivered to the Trustees by the Clearing Agency
setting forth the Capital Security Beneficial Owners' votes or assigning the
right to vote on any matter to any other Persons either in whole or in part; and
the Clearing Agency will also make book-entry transfers among the Clearing
Agency Participants.

SECTION 9.5   Notices to Clearing Agency.
              -------------------------- 

              Whenever a notice or other communication to the Capital Security
Holders is required to be given by a Trustee under this Trust Agreement, such
Trustee shall give all such notices and communications specified herein to be
given to the Holder of the Global Capital Security to the Clearing Agency and
shall have no notice obligations to the Capital Security Beneficial Owners.

SECTION 9.6   Appointment of Successor Clearing Agency.
              ---------------------------------------- 

              If any Clearing Agency elects to discontinue its services as
securities depositary with respect to the Capital Securities, the Administrative
Trustees may, in their sole discretion, appoint a successor Clearing Agency with
respect to such Capital Securities.

                                   ARTICLE X
                           LIMITATION OF LIABILITY OF
                   HOLDERS OF SECURITIES, TRUSTEES OR OTHERS

                                       54

 
SECTION 10.1  Liability.
              --------- 

              (a) Except as expressly set forth in this Trust Agreement, the
Securities Guarantees and the terms of the Securities, the Sponsor shall not be:

                  (i)    personally liable for the return of any portion of the
          capital contributions (or any return thereon) of the Holders which
          shall be made solely from assets of the Trust; and

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

              (b) The Sponsor shall be liable for all of the debts and
obligations of the Trust (other than in respect of the Securities) to the extent
not satisfied out of the Trust's assets.

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

SECTION 10.2  Exculpation.
              ----------- 

              (a) No Indemnified Person shall be liable, responsible or
accountable in damages or otherwise to the Trust 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 on behalf of the Trust and in a
manner such Indemnified Person reasonably believed to be within the scope of the
authority conferred on such Indemnified Person by this Trust Agreement 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 gross negligence (or in
the case of the Property Trustee or the Delaware Trustee, 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 Trust and upon such information, opinions,
reports or statements presented to the Trust by any Person as to matters the
Indemnified Person reasonably believes are within such other Person's
professional or expert competence and who has been selected with reasonable care
by or on behalf of the Trust, including information, opinions, reports or
statements as to the value and amount of the assets, liabilities, profits,
losses, or any other facts pertinent to the existence and amount of assets from
which Distributions to Holders might properly be paid.

SECTION 10.3  Fiduciary Duty.
              -------------- 

              (a) To the extent that, at law or in equity, an Indemnified Person
has duties (including fiduciary duties) and liabilities relating thereto to the
Trust or to any other Covered Person, an Indemnified Person acting under this
Trust Agreement shall not be liable to the Trust or to any other Covered Person
for its good faith reliance on the provisions of this Trust Agreement. The
provisions of this Trust Agreement, to the extent that they restrict the duties
and liabilities of 

                                       55

 
an Indemnified Person otherwise existing at law or in equity (other than the
duties imposed on the Property Trustee under the Trust Indenture Act), are
agreed by the parties hereto to replace such other duties and liabilities of
such Indemnified Person.

              (b) Unless otherwise expressly provided herein:

                  (i)    whenever a conflict of interest exists or arises
          between any Covered Person and any Indemnified Person, or

                  (ii)   whenever this Trust Agreement or any other agreement
          contemplated herein or therein provides that an Indemnified Person
          shall act in a manner that is, or provides terms that are, fair and
          reasonable to the Trust or any Holder of Securities,

the Indemnified Person shall resolve such conflict of interest, take such action
or provide such terms, considering in each case the relative interest of each
party (including its own interest) to such conflict, agreement, transaction or
situation and the benefits and burdens relating to such interests, any customary
or accepted industry practices, and any applicable generally accepted accounting
practices or principles. In the absence of bad faith by the Indemnified Person,
the resolution, action or term so made, taken or provided by the Indemnified
Person shall not constitute a breach of this Trust Agreement or any other
agreement contemplated herein or of any duty or obligation of the Indemnified
Person at law or in equity or otherwise.

              (c) Whenever in this Trust Agreement an Indemnified Person is
permitted or required to make a decision:

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

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

SECTION 10.4  Indemnification.
              --------------- 

              (a)   (i) The Sponsor shall indemnify, to the full extent
permitted by law, any Company Indemnified Person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(other than an action by or in the right of the Trust) by reason of the fact
that he is or was a Company Indemnified Person, against expenses (including
attorneys' fees and expenses), judgments, fines and amounts paid in settlement
actually and reasonably incurred by him in connection with such action, suit or
proceeding if he acted in good faith and in a manner he 

                                       56

 
reasonably believed to be in or not opposed to the best interests of the Trust,
and, with respect to any criminal action or proceeding, had no reasonable cause
to believe his conduct was unlawful. The termination of any action, suit or
proceeding by judgment, order, settlement, conviction, or upon a plea of nolo
contendere or its equivalent, shall not, of itself, create a presumption that
the Company Indemnified Person did not act in good faith and in a manner which
he reasonably believed to be in or not opposed to the best interests of the
Trust, and, with respect to any criminal action or proceeding, had reasonable
cause to believe that his conduct was unlawful.

                  (ii)   The Sponsor shall indemnify, to the full extent
permitted by law, any Company Indemnified Person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action or
suit by or in the right of the Trust to procure a judgment in its favor by
reason of the fact that he is or was a Company Indemnified Person against
expenses (including attorneys' fees and expenses) actually and reasonably
incurred by him in connection with the defense or settlement of such action or
suit if he acted in good faith and in a manner he reasonably believed to be in
or not opposed to the best interests of the Trust and except that no such
indemnification shall be made in respect of any claim, issue or matter as to
which such Company Indemnified Person shall have been adjudged to be liable to
the Trust unless and only to the extent that the Court of Chancery of Delaware
or the court in which such action or suit was brought shall determine upon
application that, despite the adjudication of liability but in view of all the
circumstances of the case, such Person is fairly and reasonably entitled to
indemnity for such expenses which such Court of Chancery or such other court
shall deem proper.

                  (iii)  To the extent that a Company Indemnified Person shall
be successful on the merits or otherwise (including dismissal of an action
without prejudice or the settlement of an action without admission of liability)
in defense of any action, suit or proceeding referred to in paragraphs (i) and
(ii) of this Section 10.4(a), or in defense of any claim, issue or matter
therein, he shall be indemnified, to the full extent permitted by law, against
expenses (including attorneys' fees) actually and reasonably incurred by him in
connection therewith.

                  (iv)   Any indemnification under paragraphs (i) and (ii) of
this Section 10.4(a) (unless ordered by a court) shall be made by the Sponsor
only as authorized in the specific case upon a determination that
indemnification of the Company Indemnified Person is proper in the circumstances
because he has met the applicable standard of conduct set forth in paragraphs
(i) and (ii). Such determination shall be made (1) by the Administrative
Trustees by a majority vote of a Quorum consisting of such Administrative
Trustees who were not parties to such action, suit or proceeding, (2) if such a
Quorum is not obtainable, or, even if obtainable, if a Quorum of disinterested
Administrative Trustees so directs, by independent legal counsel in a written
opinion, or (3) by the Common Security Holder of the Trust.

                  (v)    Expenses (including attorneys' fees and expenses)
incurred by a Company Indemnified Person in defending a civil, criminal,
administrative or investigative action, suit or proceeding referred to in
paragraphs (i) and (ii) of this Section 10.4(a) shall be paid by the Sponsor in
advance of the final disposition of such action, suit or proceeding upon receipt
of an undertaking by or on behalf of such Company Indemnified Person to repay
such amount if it shall ultimately be determined that he is not entitled to be
indemnified by the Sponsor as authorized in this 

                                       57

 
Section 10.4(a). Notwithstanding the foregoing, no advance shall be made by the
Sponsor if a determination is reasonably and promptly made (i) by the
Administrative Trustees by a majority vote of a Quorum of disinterested
Administrative Trustees, (ii) if such a Quorum is not obtainable, or, even if
obtainable, if a Quorum of disinterested Administrative Trustees so directs, by
independent legal counsel in a written opinion or (iii) by the Common Security
Holder of the Trust, that, based upon the facts known to the Administrative
Trustees, counsel or the Common Security Holder at the time such determination
is made, such Company Indemnified Person acted in bad faith or in a manner that
the Common Security Holder did not believe to be in or not opposed to the best
interests of the Trust, or, with respect to any criminal proceeding, that such
Company Indemnified Person believed or had reasonable cause to believe his
conduct was unlawful. In no event shall any advance be made in instances where
the Administrative Trustees, independent legal counsel or Common Security Holder
reasonably determine that a Company Indemnified Person deliberately breached his
duty to the Trust or its Common or Capital Security Holders.

                  (vi)   The indemnification and advancement of expenses
provided by, or granted pursuant to, the other paragraphs of this Section
10.4(a) shall not be deemed exclusive of any other rights to which those seeking
indemnification and advancement of expenses may be entitled under any agreement,
vote of stockholders or disinterested directors of the Sponsor or Capital
Security Holders of the Trust or otherwise, both as to action in his official
capacity and as to action in another capacity while holding such office. All
rights to indemnification under this Section 10.4(a) shall be deemed to be
provided by a contract between the Sponsor and each Company Indemnified Person
who serves in such capacity at any time while this Section 10.4(a) is in effect.
Any repeal or modification of this Section 10.4(a) shall not affect any rights
or obligations then existing.

                  (vii)  The Sponsor or the Trust may purchase and maintain
insurance on behalf of any person who is or was a Company Indemnified Person
against any liability asserted against him and incurred by him in any such
capacity, or arising out of his status as such, whether or not the Debenture
Issuer would have the power to indemnify him against such liability under the
provisions of this Section 10.4(a).

                  (viii) For purposes of this Section 10.4(a), references to
"the Trust" shall include, in addition to the resulting or surviving entity, any
constituent entity (including any constituent of a constituent) absorbed in a
consolidation or merger, so that any person who is or was a director, trustee,
officer or employee of such constituent entity, or is or was serving at the
request of such constituent entity as a director, trustee, officer, employee or
agent of another entity, shall stand in the same position under the provisions
of this Section 10.4(a) with respect to the resulting or surviving entity as he
would have with respect to such constituent entity if its separate existence had
continued.

                  (ix)   The indemnification and advancement of expenses
provided by, or granted pursuant to, this Section 10.4(a) shall, unless
otherwise provided when authorized or ratified, continue as to a Person who has
ceased to be a Company Indemnified Person and shall inure to the benefit of the
heirs, executors and administrators of such a Person.

                                       58

 
              (b) The Sponsor agrees to indemnify the (i) Property Trustee, (ii)
the Delaware Trustee, (iii) any Affiliate of the Property Trustee or the
Delaware Trustee, and (iv) any officers, directors, shareholders, members,
partners, employees, representatives, custodians, nominees or agents of the
Property Trustee or the Delaware Trustee (each of the Persons in (i) through
(iv), including the Property Trustee and the Delaware Trustee in their
respective individual capacities, being referred to as a "Fiduciary Indemnified
Person") for, and to hold each Fiduciary Indemnified Person harmless against,
any and all loss, liability, damage, action, suit, claim or expense including
taxes (other than taxes based on the income of such Fiduciary Indemnified
Person) of any kind and nature whatsoever incurred without negligence (or gross
negligence on the part of the Delaware Trustee) or bad faith on the part of such
Fiduciary 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 defending
against or investigating any claim or liability in connection with the exercise
or performance of any of the powers or duties of such Fiduciary Indemnified
Person hereunder. The obligation to indemnify as set forth in this Section
10.4(b) shall survive the resignation or removal of the Property Trustee or the
Delaware Trustee and the satisfaction and discharge of this Trust Agreement.

              (c) The Sponsor agrees to pay the Property Trustee and the
Delaware Trustee, from time to time, such compensation for all services rendered
by the Property Trustee and the Delaware Trustee hereunder as may be mutually
agreed upon in writing by the Sponsor and the Property Trustee or the Delaware
Trustee, as the case may be, and, except as otherwise expressly provided herein,
to reimburse the Property Trustee and the Delaware Trustee upon its or their
request for all reasonable expenses (including counsel fees and expenses),
disbursements and advances incurred or made by the Property Trustee or the
Delaware Trustee, as the case may be, in accordance with the provisions of this
Trust Agreement, except any such expense, disbursement or advance as may be
attributable to its or their negligence or bad faith.

SECTION 10.5  Outside Businesses.
              ------------------ 

              Any Covered Person, the Sponsor, the Delaware Trustee and the
Property Trustee (subject to Section 5.3(c)) may engage in or possess an
interest in other business ventures of any nature or description, independently
or with others, similar or dissimilar to the business of the Trust, and the
Trust and the Holders shall have no rights by virtue of this Trust Agreement in
and to such independent ventures or the income or profits derived therefrom, and
the pursuit of any such venture, even if competitive with the business of the
Trust, shall not be deemed wrongful or improper. No Covered Person, the Sponsor,
the Delaware Trustee, or the Property Trustee shall be obligated to present any
particular investment or other opportunity to the Trust even if such opportunity
is of a character that, if presented to the Trust, could be taken by the Trust,
and any Covered Person, the Sponsor, the Delaware Trustee and the Property
Trustee shall have the right to take for its own account (individually or as a
partner or fiduciary) or to recommend to others any such particular investment
or other opportunity. Any Covered Person, the Delaware Trustee and the Property
Trustee may engage or be interested in any financial or other transaction with
the Sponsor or any Affiliate of the Sponsor, or may act as depositary for,
trustee or agent for, or act on any committee or body of holders of, securities
or other obligations of the Sponsor or its Affiliates.

                                       59

 
                                  ARTICLE XI
                                  ACCOUNTING

SECTION 11.1  Fiscal Year.
              ----------- 

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

SECTION 11.2  Certain Accounting Matters.
              -------------------------- 

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

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

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

SECTION 11.3  Banking.
              ------- 

              The Trust may maintain one or more bank accounts in the name and
for the sole benefit of the Trust; provided, however, that all payments of funds
                                   --------  -------   
in respect of the Debentures held by the Property Trustee shall be made directly
to the Property Trustee Account and no other funds of the Trust shall be
deposited in the Property Trustee Account. The sole signatories for such
accounts shall be designated by Administrative Trustees; provided, however, that
                                                         --------  -------   
the Property Trustee shall designate the signatories for the Property Trustee
Account.

SECTION 11.4  Withholding.
              ----------- 

              The Trust and the Administrative Trustees shall comply with all
withholding requirements under United States federal, state and local law. The
Trust shall request, and the 

                                       60

 
Holders shall provide to the Trust, such forms or certificates as are necessary
to establish an exemption from withholding with respect to each Holder, and any
representations and forms as shall reasonably be requested by the Trust to
assist it in determining the extent of, and in fulfilling, its withholding
obligations. The Administrative Trustees shall cause to be filed required forms
with applicable jurisdictions and, unless an exemption from withholding is
properly established by a Holder, shall remit amounts withheld with respect to
the Holder to applicable jurisdictions. To the extent that the Trust is required
to withhold and pay over any amounts to any authority with respect to
Distributions or allocations to any Holder, the amount withheld shall be deemed
to be a Distribution in the amount of the withholding to the Holder. In the
event of any claim of excess withholding, Holders shall be limited to an action
against the applicable jurisdiction. If the amount required to be withheld was
not withheld from actual Distributions made, the Trust may reduce subsequent
Distributions by the amount of such withholding.

                                  ARTICLE XII
                            AMENDMENTS AND MEETINGS

SECTION 12.1  Amendments.
              ---------- 

              (a) Except as otherwise provided in this Trust Agreement
(including Section 7 of Annex I hereto) or by any applicable terms of the
Securities, this Trust Agreement may only be amended by a written instrument
approved and executed by:

                  (i)    the Sponsor and the Administrative Trustees (or, if
          there are more than two Administrative Trustees, a majority of the
          Administrative Trustees);

                  (ii)   if the amendment affects the rights, powers, duties,
          obligations or immunities of the Property Trustee, the Property
          Trustee; and

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

              (b) No amendment shall be made, and any such purported amendment
shall be void and ineffective:

                  (i)    unless, in the case of any proposed amendment, the
          Property Trustee shall have first received an Officers' Certificate
          from each of the Trust and the Sponsor that such amendment is
          permitted by, and conforms to, the terms of this Trust Agreement
          (including the terms of the Securities);

                  (ii)   unless, in the case of any proposed amendment which
          affects the rights, powers, duties, obligations or immunities of the
          Property Trustee, the Property Trustee shall have first received:

                                       61

 
                  (A) an Officers' Certificate from each of the Trust and the
                  Sponsor that such amendment is permitted by, and conforms to,
                  the terms of this Trust Agreement (including the terms of the
                  Securities); and

                  (B) an Opinion of Counsel (who may be counsel to the Sponsor
                  or the Trust) that such amendment is permitted by, and
                  conforms to, the terms of this Trust Agreement (including the
                  terms of the Securities) and that all conditions precedent to
                  the execution and delivery of such amendment have been
                  satisfied;

provided, however, that the Property Trustee shall not be required to sign any
- --------  -------                                                             
such amendment; and

                  (iii)  to the extent the result of such amendment would be to:

                  (A) cause the Trust to fail to continue to be classified for
                  purposes of United States federal income taxation as a grantor
                  trust;

                  (B) reduce or otherwise adversely affect the powers of the
                  Property Trustee in contravention of the Trust Indenture Act;
                  or

                  (C) cause the Trust to be deemed to be an Investment Company
                  required to be registered under the Investment Company Act.

              (c) At such time after the Trust has issued any Securities that
remain outstanding, any amendment that would adversely affect the rights,
privileges or preferences of any Holder (other than an amendment pursuant to
(g)(ii) below) may be effected only with such additional requirements as may be
set forth in the terms of such Securities;

              (d) Section 10.1(c) and this Section 12.1 shall not be amended
without the consent of all of the Holders;

              (e) Article Four shall not be amended without the consent of the
Holders of a Majority in Liquidation Amount of the Common Securities;

              (f) The rights of the Holders of the Common Securities under
Article V to increase or decrease the number of, and appoint and remove Trustees
shall not be amended without the consent of the Holders of a Majority in
Liquidation Amount of the Common Securities; and

              (g) Notwithstanding Section 12.1(c), this Trust Agreement may be
amended without the consent of the Holders to:

                  (i)    cure any ambiguity, correct or supplement any provision
          in this Trust Agreement that may be inconsistent with any other
          provision of this Trust Agreement or to make any other provisions with
          respect to matters or questions 

                                       62

 
          arising under this Trust Agreement which shall not be inconsistent
          with the other provisions of the Trust Agreement;

                  (ii)   to modify, eliminate or add to any provisions of the
          Trust Agreement to such extent as shall be necessary to ensure that
          the Trust will be classified for United States federal income tax
          purposes as a grantor trust at all times that any Securities are
          outstanding or to ensure that the Trust will not be required to
          register as an Investment Company under the Investment Company Act;
          and

                  (iii)  to modify, eliminate or add any provisions of the Trust
          Agreement to such extent as shall be necessary to enable the Trust or
          the Sponsor to conduct an Exchange Offer in the manner contemplated by
          the Registration Rights Agreement;

provided, however, that in the case of clauses (i) and (iii) above, such action
- --------  -------                                                              
shall not adversely affect in any material respect the interests of the Holders,
and any such amendments of this Trust Agreement shall become effective when
notice thereof is given to the Holders.

SECTION 12.2  Meetings of the Holders; Action by Written Consent.
              -------------------------------------------------- 

              (a) Meetings of the Holders of any class of Securities may be
called at any time by the Administrative Trustees (or as provided in the terms
of the Securities) to consider and act on any matter on which Holders of such
class of Securities are entitled to act under the terms of this Trust Agreement,
the terms of the Securities or the rules of any stock exchange on which the
Capital Securities are listed or admitted for trading. The Administrative
Trustees shall call a meeting of the Holders of such class if directed to do so
by the Holders of at least 10% in Liquidation Amount of such class of
Securities. Such direction shall be given by delivering to the Administrative
Trustees one or more notices in writing stating that the signing Holders wish to
call a meeting and indicating the general or specific purpose for which the
meeting is to be called. Any Holders calling a meeting shall specify in writing
the Capital Security Certificates held by the Holders exercising the right to
call a meeting and only those Securities specified shall be counted for purposes
of determining whether the required percentage set forth in the second sentence
of this paragraph has been met.

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

                  (i)    notice of any such meeting shall be given to all the
          Holders having a right to vote thereat at least seven days and not
          more than 60 days before the date of such meeting. Whenever a vote,
          consent or approval of the Holders is permitted or required under this
          Trust Agreement or the rules of any stock exchange on which the
          Capital Securities are listed or admitted for trading, such vote,
          consent or approval may be given at a meeting of the Holders; any
          action that may be taken at a meeting of the Holders may be taken
          without a meeting if a consent in writing setting forth the action so
          taken is signed by the Holders owning not less than the minimum amount
          of Securities in liquidation amount 

                                       63

 
          that would be necessary to authorize or take such action at a meeting
          at which all Holders having a right to vote thereon were present and
          voting; prompt notice of the taking of action without a meeting shall
          be given to the Holders entitled to vote who have not consented in
          writing; and the Administrative Trustees may specify that any written
          ballot submitted to the Security Holder for the purpose of taking any
          action without a meeting shall be returned to the Trust within the
          time specified by the Administrative Trustees;

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

                  (iii)  each meeting of the Holders shall be conducted by the
          Administrative Trustees or by such other Person that the
          Administrative Trustees may designate; and

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

                                 ARTICLE XIII
                      REPRESENTATIONS OF PROPERTY TRUSTEE
                              AND DELAWARE TRUSTEE

SECTION 13.1  Representations and Warranties of Property Trustee.
              -------------------------------------------------- 

              The Trustee that acts as initial Property Trustee represents and
warrants to the Trust and to the Sponsor at the date of this Trust Agreement,
and each Successor Property Trustee represents and warrants to the Trust and the
Sponsor at the time of the Successor Property Trustee's acceptance of its
appointment as Property Trustee that:

                                       64

 
              (a) the Property Trustee is a banking corporation, a national
banking association or a bank or trust company, duly organized, validly existing
and in good standing under the laws of the United States or the State of
Delaware as the case may be, with corporate power and authority to execute and
deliver, and to carry out and perform its obligations under the terms of, this
Trust Agreement;

              (b) the execution, delivery and performance by the Property
Trustee of this Trust Agreement has been duly authorized by all necessary
corporate action on the part of the Property Trustee; and this Trust Agreement
has been duly executed and delivered by the Property Trustee and under Delaware
law (excluding any securities laws) constitutes a legal, valid and binding
obligation of the Property Trustee, enforceable against it in accordance with
its terms, subject to applicable bankruptcy, reorganization, moratorium,
insolvency, and other similar laws affecting creditors' rights generally and to
general principles of equity and the discretion of the court (regardless of
whether the enforcement of such remedies is considered in a proceeding in equity
or at law);

              (c) the execution, delivery and performance of this Trust
Agreement by the Property Trustee does not conflict with or constitute a breach
of the charter or by-laws of the Property Trustee; and

              (d) no consent, approval or authorization of, or registration with
or notice to, any federal or state banking authority governing the trust powers
of the Property Trustee is required for the execution, delivery or performance
by the Property Trustee of this Trust Agreement.

SECTION 13.2  Representations and Warranties of Delaware Trustee.
              -------------------------------------------------- 

              The Trustee that acts as initial Delaware Trustee represents and
warrants to the Trust and to the Sponsor at the date of this Trust Agreement,
and each Successor Delaware Trustee represents and warrants to the Trust and the
Sponsor at the time of the Successor Delaware Trustee's acceptance of its
appointment as Delaware Trustee that:

              (a) the Delaware Trustee is a banking corporation, a national
banking association or a bank or trust company, duly organized, validly existing
and in good standing under the laws of the United States or the State of
Delaware, as the case may be, with corporate power and authority to execute and
deliver, and to carry out and perform its obligations under the terms of, this
Trust Agreement;

              (b) the execution, delivery and performance by the Delaware
Trustee of this Trust Agreement has been duly authorized by all necessary
corporate action on the part of the Delaware Trustee; and this Trust Agreement
has been duly executed and delivered by the Delaware Trustee and under Delaware
law (excluding any securities laws) constitutes a legal, valid and binding
obligation of the Delaware Trustee, enforceable against it in accordance with
its terms, subject to applicable bankruptcy, reorganization, moratorium,
insolvency, and other similar laws affecting creditors' rights generally and to
general principles of equity and the discretion of the court 

                                       65

 
(regardless of whether the enforcement of such remedies is considered in a
proceeding in equity or at law);

              (c) the execution, delivery and performance of this Trust
Agreement by the Delaware Trustee does not conflict with or constitute a breach
of the charter or by-laws of the Delaware Trustee; and

              (d) no consent, approval or authorization of, or registration with
or notice to, any federal or Delaware banking authority governing the trust
powers of the Delaware Trustee is required for the execution, delivery or
performance by the Delaware Trustee of this Trust Agreement; and

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

                                  ARTICLE XIV
                              REGISTRATION RIGHTS

SECTION 14.1  Registration Rights Agreement; Liquidated Damages.
              ------------------------------------------------- 

              The Holders of the Series A Capital Securities, the Series A
Debentures and the Series A Capital Securities Guarantee are entitled to the
benefits of the Registration Rights Agreement and the Liquidated Damages
Agreement. In certain limited circumstances set forth in the Registration Rights
Agreement and the Liquidated Damages Agreement, the Debenture Issuer shall be
required to pay liquidated damages with respect to the Debentures. Unless
otherwise stated, the term "Distribution," as used in this Trust Agreement,
includes any and all liquidated damages.

                                  ARTICLE XV
                                 MISCELLANEOUS

SECTION 15.1  Notices.
              ------- 

              All notices provided for in this Trust Agreement shall be in
writing, duly signed by the party giving such notice, and shall be delivered,
telecopied or mailed by first class mail, overnight courier service or confirmed
telecopy, as follows:

              (a) if given to the Trust, in care of the Administrative Trustees
at the Trust's mailing address set forth below (or such other address as the
Trust may give notice of to the Property Trustee, the Delaware Trustee and the
Holders):

              GBB Capital II
              c/o Greater Bay Bancorp
              2860 West Bayshore Road
              Palo Alto, California 94303

                                       66

 
              Attn.: Steven C. Smith
              Telephone: (650) 813-8200
              Telecopier: (650) 494-9193

              (b) if given to the Delaware Trustee, at the mailing address set
forth below (or such other address as Delaware Trustee may give notice of to the
Holders):

              Wilmington Trust Company
              Rodney Square North
              1100 North Market Street
              Wilmington, Delaware 19890-0001
              Attn.: Corporate Trust Administration
              Telephone: (302) 651-1000
              Telecopier: (302) 651-8882

              (c) if given to the Property Trustee, at the Property Trustee's
mailing address set forth below (or such other address as the Property Trustee
may give notice of to the Holders):

              Wilmington Trust Company
              Rodney Square North
              1100 North Market Street
              Wilmington, Delaware 19890-0001
              Attn.: Corporate Trust Administration
              Telephone: (302) 651-1000
              Telecopier: (302) 651-8882

              (d) if given to the Holder of the Common Securities, at the
mailing address of the Sponsor set forth below (or such other address as the
Holder of the Common Securities may give notice to the Trust):

              Greater Bay Bancorp
              2860 West Bayshore Road
              Palo Alto, California 94303
              Attn.: Steven C. Smith
              Telephone: (650) 813-8200
              Telecopier: (650) 494-9193

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

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

                                       67

 
SECTION 15.2  Governing Law.
              ------------- 

              This Trust Agreement and the rights of the parties hereunder shall
be governed by and construed in accordance with the laws of the State of
Delaware without regard to conflict of laws principles thereof.

SECTION 15.3  Intention of the Parties.
              ------------------------ 

              It is the intention of the parties hereto that the Trust be
classified for United States federal income tax purposes as a grantor trust. The
provisions of this Trust Agreement shall be interpreted to further this
intention of the parties.

SECTION 15.4  Headings.
              -------- 

              Headings contained in this Trust Agreement are inserted for
convenience of reference only and do not affect the interpretation of this Trust
Agreement or any provision hereof.

SECTION 15.5  Successors and Assigns.
              ---------------------- 

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

SECTION 15.6  Partial Enforceability.
              ---------------------- 

              If any provision of this Trust Agreement, or the application of
such provision to any Person or circumstance, shall be held invalid, the
remainder of this Trust Agreement, or the application of such provision to
Persons or circumstances other than those to which it is held invalid, shall not
be affected thereby.

SECTION 15.7  Counterparts.
              ------------ 

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

                                       68

 
            IN WITNESS WHEREOF, the undersigned has caused these presents to be
executed as of the day and year first above written.


                              /s/ Steven C. Smith
                              --------------------------------------------------
                              Steven C. Smith,
                              as Administrative Trustee


                              /s/ Shawn E. Saunders
                              --------------------------------------------------
                              Shawn E. Saunders,
                              as Administrative Trustee


                              /s/ Mark Eschen
                              --------------------------------------------------
                              Mark Eschen,
                              as Administrative Trustee

                              WILMINGTON TRUST COMPANY,
                              as Delaware Trustee


                              By:   /s/ Patricia A. Evans
                                    --------------------------------------------
                              Name:      Patricia A. Evans
                              Title:     Financial Services Officer


                              WILMINGTON TRUST COMPANY,
                              as Property Trustee


                              By:   /s/ Patricia A. Evans
                                    --------------------------------------------
                              Name:      Patricia A. Evans
                              Title:     Financial Services Officer


                              GREATER BAY BANCORP,
                              as Sponsor and Debenture Issuer


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

                                       69

 
                                    ANNEX I

                                    TERMS OF
              FLOATING RATE CAPITAL SECURITIES, SERIES A/SERIES B
                        FLOATING RATE COMMON SECURITIES


          Pursuant to Section 7.1 of the Amended and Restated Trust Agreement,
dated as of August 12, 1998 (as amended from time to time, the "Trust
Agreement"), the designation, rights, privileges, restrictions, preferences and
other terms and provisions of the Securities are set out below (each capitalized
term used but not defined herein has the meaning set forth in the Trust
Agreement or, if not defined in such Trust Agreement, as defined in the Offering
Memorandum referred to below in Section 2(g) of this Annex I):

     1.   Designation and Number.
          ---------------------- 

          (a) Capital Securities. 30,000 Series A Capital Securities of the
              ------------------                                           
Trust and 30,000 Series B Capital Securities of the Trust, each series with an
aggregate liquidation amount with respect to the assets of the Trust Thirty
Million Dollars ($30,000,000) and with a liquidation amount with respect to the
assets of the Trust of One Thousand Dollars ($1,000) (the "Liquidation Amount")
per security, are hereby designated for the purposes of identification only as
"Floating Rate Capital Securities, Series A" and "Floating Rate Capital
Securities, Series B," respectively (collectively, the "Capital Securities").
The certificates evidencing the Capital Securities shall be substantially in the
form of Exhibit A-1 to the Trust Agreement, with such changes and additions
thereto or deletions therefrom as may be required by ordinary usage, custom or
practice or to conform to the rules of any exchange or quotation system on or in
which the Capital Securities are listed, traded or quoted.

          (b) Common Securities. 928 Common Securities of the Trust with an
              -----------------                                            
aggregate liquidation amount with respect to the assets of the Trust of Nine
Hundred and Twenty Eight Thousand Dollars ($928,000) and a liquidation amount
with respect to the assets of the Trust of $1,000 per security, are hereby
designated for the purposes of identification only as "Floating Rate Common
Securities" (the "Common Securities"). The certificates evidencing the Common
Securities shall be substantially in the form of Exhibit A-2 to the Trust
Agreement, with such changes and additions thereto or deletions therefrom as may
be required by ordinary usage, custom or practice.

     2.   Distributions.
          ------------- 

          (a) Distributions on each Security will be payable at a rate per
annum, reset quarterly, equal to 3-month LIBOR (as defined below) plus 150 basis
points  (the "Coupon Rate"), such rate being the rate of interest payable on the
Debentures to be held by the Property Trustee. Distributions in arrears for more
than one quarterly period will bear additional Distributions thereon compounded
quarterly at the Coupon Rate (to the extent permitted by applicable law).
Pursuant to the Registration Rights Agreement, in certain limited circumstances
the Debenture Issuer will be required to pay Liquidated Damages (as defined in
the Registration Rights Agreement) with respect to the Debentures. The term
"Distributions," as used herein, includes distributions of any and all 

                                      I-1

 
such interest and Liquidated Damages, if any, payable unless otherwise stated. A
Distribution is payable only to the extent that payments are made with respect
to the Debentures held by the Property Trustee and to the extent the Property
Trustee has funds legally available therefor.

          (b) The Coupon Rate on the Securities for each quarter (or other
period for which interest is payable) will be determined on the Determination
Date (as defined below) for such quarter (or other period for which interest is
payable) and will be a per annum rate reset quarterly equal to 3-month LIBOR
(determined as set forth below) plus 150 basis points, and will be effective as
of the first day of such quarter (or other period for which interest is
payable).

          (c) On each Determination Date, the Calculation Agent will calculate
the interest rate, based on 3-month LIBOR, for each interest period commencing
on the second London Banking Day immediately following such Determination Date.
"3-month LIBOR" means, with respect to an interest period relating to a
Distribution Date, the London interbank offered rate for three-month, Eurodollar
deposits determined in the following order of priority:

     (i)    the rate (expressed as a percentage per annum) for Eurodollar
deposits having a three-month maturity that appears on Telerate Page 3750 as of
11:00 a.m. (London time) on the related Determination Date);

     (ii)   if such rate does not appear on Telerate Page 3750 as of 11:00 a.m.
(London time) on the related Determination Date, 3-month LIBOR will be the
arithmetic mean of the rates (expressed as percentages per annum) for Eurodollar
deposits having a three-month maturity that appear on Reuters Monitor Money
Rates Page LIBO ("Reuters Page LIBO") as of 11:00 a.m. (London time) on such
Determination Date;

     (iii)  if such rate does not appear on Reuters Page LIBO as of 11:00
a.m. (London time) on the related Determination Date, the Calculation Agent will
request the principal London offices of four leading banks in the London
interbank market to provide such banks' offered quotations (expressed as
percentages per annum) to prime banks in the London interbank market for
Eurodollar deposits having a three-month maturity as of 11:00 a.m. (London time)
on such Determination Date. If at least two quotations are provided, 3-month
LIBOR will be the arithmetic mean of such quotations;

     (iv)   if fewer than two such quotations are provided as requested in
clause (iii) above, the Calculation Agent will request four major New York City
banks to provide such banks' offered quotations (expressed as percentages per
annum) to leading European banks for loans in Eurodollars as of 11:00 a.m.
(London time) on such Determination Date. If at least two such quotations are
provided, 3-month LIBOR will be the arithmetic mean of such quotations; and

     (v)    if fewer than two such quotations are provided as requested in
clause (iv) above, 3-month LIBOR will be 3-month LIBOR determined with respect
to the interest period immediately preceding such current interest period.

                                      I-2

 
     If the rate for Eurodollar deposits having a three-month maturity that
initially appears on Telerate Page 3750 or Reuters Page LIBO, as the case may
be, as of 11:00 a.m. (London time) on the related Determination Date is
superceded on Telerate Page 3750 or Reuters Page LIBO, as the case may be, by a
corrected rate before 12:00 noon (London time) on such Determination Date, the
corrected rate as so substituted on the applicable page will be the applicable
3-month LIBOR for such Determination Date.

     As used herein:

     "Calculation Agent" means Wilmington Trust Company, Wilmington, Delaware.

     "Determination Date" means the date that is two London Banking Days
preceding the first day of any quarter or other period for which a Distribution
will be payable.

     "London Banking Day" means a day on which dealings in deposits in U.S.
dollars are transacted in the London interbank market.

     "Telerate Page 3750" means the display designated as "Page 3750" on the Dow
Jones Telerate Service (or such other page as may replace Page 3750 on that
service or such other service or services as may be nominated by the British
Bankers' Association as the information vendor for the purpose of displaying
London interbank offered rates for U.S. dollar deposits).

          (d) All percentages resulting from any calculations on the Securities
will be rounded, if necessary, to the nearest one hundred-thousandth of a
percentage point, with five one-millionths of a percentage point rounded upward
(e.g., 9.876545% (or .09876545) being rounded to 9.87655% (or .0987655)), and
all dollar amounts used in or resulting from such calculation will be rounded to
the nearest cent (with one-half cent being rounded upward).

          (e) On the Determination Date, the Calculation Agent shall notify the
Debenture Issuer and the Paying Agent of the applicable Coupon Rate in effect
for the related Distribution period.  The Calculation Agent shall, upon the
request of the holder of any Securities, provide the Coupon Rate then in effect.
All calculations made by the Calculation Agent in the absence of manifest error
shall be conclusive for all purposes and binding on the Sponsor and the Holders
of the Securities.  The Paying Agent shall be entitled to rely on information
received from the Calculation Agent or the Debenture Issuer as to the Coupon
Rate.

          (f) Distributions on the Securities will be cumulative, will
accumulate from the most recent date to which Distributions have been paid or,
if no Distributions have been paid, from August 12, 1998 and will be payable
quarterly in arrears on March 15, June 15, September 15 and December 15 of each
year, commencing December 15, 1998 (each, a "Distribution Date"), except as
otherwise described below.  Distributions will be computed on the basis of the
actual number of days elapsed in such period and a 360-day year. As long as no
Event of Default has occurred and is continuing under the Indenture, the
Debenture Issuer has the right under the Indenture to defer payments of interest
by extending the interest payment period at any time and from time to time on
the Debentures for a period not exceeding 20 consecutive quarterly periods,
including the first such 

                                      I-3

 
quarterly period during such period (each an "Extension Period"), during which
Extension Period no interest shall be due and payable on the Debentures,
provided that no Extension Period shall end on a date other than an Interest 
- -------- ----                                                   
Payment Date for the Debentures or extend beyond the Maturity Date of the
Debentures. As a consequence of such deferral, Distributions (other than
Liquidated Damages, if any) will also be deferred. Notwithstanding such
deferral, Distributions will continue to accumulate with additional
Distributions thereon (to the extent permitted by applicable law but not at a
rate greater than the rate at which interest is then accruing on the Debentures)
at the applicable periodic Coupon Rate compounded quarterly during any such
Extension Period. Prior to the termination of any such Extension Period, the
Debenture Issuer may further defer payments of interest by further extending
such Extension Period, provided that such extension does not cause such
                       -------- ----                                   
Extension Period, together with all such previous and further extensions within
such Extension Period, to exceed 20 consecutive quarterly periods, including the
first quarterly period during such Extension Period, end on a date other than an
Interest Payment Date for the Debentures or extend beyond the Maturity Date of
the Debentures. Upon the termination of any Extension Period and the payment of
all amounts then due, the Debenture Issuer may commence a new Extension Period,
subject to the above requirements.

          (g) Distributions on the Securities will be payable to the Holders
thereof as they appear on the books and records of the Trust on the close of
business on the first day of the month in which the relevant Distribution Date
occurs, which Distribution Dates correspond to the Interest Payment Dates for
the Debentures. Subject to any applicable laws and regulations and the
provisions of the Declaration, each such payment with respect to the Capital
Securities will be made as described under the heading "Description of Capital
Securities -- Form, Denomination, Book-Entry Procedures and Transfer" in the
Offering Memorandum dated August 7, 1998 of the Debenture Issuer and the Trust
relating to the Securities and the Debentures. The relevant record dates for the
Common Securities shall be the same as the record dates for the Capital
Securities. Distributions payable on any Securities that are not punctually paid
on any Distribution Date, as a result of the Debenture Issuer having failed to
make a payment under the Debentures, will cease to be payable to the Holder on
the relevant record date, and such defaulted Distribution will instead be
payable to the Person in whose name such Securities are registered on the
special record date or other specified date determined in accordance with the
Indenture. If any date on which Distributions are payable on the Securities is
not a Business Day, then payment of the Distributions payable on such date will
be made on the next succeeding day that is a Business Day (and without any
interest or other payment in respect of any such delay), except that if such
next succeeding Business Day falls in the next succeeding calendar month, such
payment shall be made on the immediately preceding Business Day with the same
force and effect as if made on such date.

          (h) In the event that there is any money or other property held by or
for the Trust that is not accounted for hereunder, such property shall be
distributed Pro Rata (as defined herein) among the Holders.

     3.   Liquidation Distribution Upon Dissolution.
          ----------------------------------------- 

          In the event of any dissolution of the Trust, the Trust shall be
liquidated by the Trustees as expeditiously as the Trustees determine to be
possible by distributing to the Holders, 

                                      I-4

 
after satisfaction of liabilities to creditors of the Trust as provided by
applicable law, a Like Amount (as defined below) of the Debentures, unless such
distribution is determined by the Property Trustee not to be practicable, in
which event such Holders will be entitled to receive out of the assets of the
Trust legally available for distribution to Holders, after satisfaction of
liabilities to creditors of the Trust as provided by applicable law, an amount
equal to the aggregate of the liquidation amount of $1,000 per Security plus
accumulated and unpaid Distributions thereon to the date of payment (such amount
being the "Liquidation Distribution").

          "Like Amount" means (i) with respect to a redemption of the
Securities, Securities having a Liquidation Amount equal to the principal amount
of Debentures to be paid in accordance with their terms and (ii) with respect to
a distribution of Debentures upon the liquidation of the Trust, Debentures
having a principal amount equal to the Liquidation Amount of the Securities of
the Holder to whom such Debentures are distributed.

          If, upon any such liquidation, the Liquidation Distribution can be
paid only in part because the Trust has insufficient assets legally available to
pay in full the aggregate Liquidation Distribution, then the amounts payable
directly by the Trust with respect to the Securities shall be paid on a Pro Rata
basis.

     4.   Redemption and Distribution.
          --------------------------- 

          (a) Upon the repayment of the Debentures in whole or in part, at
maturity or otherwise (either at the option of the Debenture Issuer or pursuant
to a Special Event, as described below), the proceeds from such repayment shall
be simultaneously applied by the Property Trustee (subject to the Property
Trustee having received written notice no later than 45 days prior to such
repayment) to redeem a Like Amount of the Securities at a redemption price equal
to 100% of the principal of, plus accrued and unpaid interest on, the Debentures
being redeemed (the "Redemption Price"). Holders will be given not less than 30
nor more than 60 days' prior written notice of such redemption.

          (b) In the case of an optional redemption, if fewer than all the
outstanding Securities are to be so redeemed, the Common Securities and the
Capital Securities shall be redeemed Pro Rata and the Capital Securities to be
redeemed will be determined as described in Section 4(f)(ii) below. Upon the
entry of an order for the dissolution of the Trust by a court of competent
jurisdiction, the Debentures thereafter will be subject to optional redemption,
in whole, but not in part, on or after the Initial Optional Redemption Date.

          The Debenture Issuer shall have the right (subject to the conditions
in the Indenture) to elect to redeem the Debentures, in whole or in part, at any
time on or after September 15, 2008 (the "Initial Optional Redemption Date"),
and, simultaneous with such redemption, to cause a Like Amount of the Securities
to be redeemed by the Trust at the Redemption Price on a Pro Rata basis.

          (c) If at any time an Investment Company Event, a Regulatory Capital
Event or a Tax Event (each as defined below, and each a "Special Event") occurs,
the Debenture Issuer shall have the right (subject to the conditions set forth
in the Indenture) at any time prior to the Initial 


                                      I-5

 
Optional Redemption Date, to redeem the Debentures in whole, but not in part,
within the 90 days following the occurrence of such Special Event (the ''90 Day
Period"), and, simultaneous with such redemption, to cause a Like Amount of the
Securities to be redeemed by the Trust at the Redemption Price on a Pro Rata
basis.

          "Investment Company Event" shall mean the receipt by the Debenture
Issuer and the Trust of an opinion of independent securities counsel experienced
in such matters to the effect that as a result of (a) any amendment to, or
change (including any announced prospective change) in, the laws or any
regulations thereunder of the United States or any rules, guidelines or policies
of any applicable regulatory authority for the Debenture Issuer or (b) any
official administrative pronouncement or judicial decision interpreting or
applying such laws or regulations, which amendment or change is effective or
which pronouncement or decision is announced on or after the date of original
issuance of the Securities, the Trust is, or within 90 days of the date of such
opinion will be, considered an Investment Company that is required to be
registered under the Investment Company Act.

          "Regulatory Capital Event" shall mean the receipt by the Debenture
Issuer and the Trust of an opinion of independent bank regulatory counsel
experienced in such matters to the effect that as a result of (a) any amendment
to, or change (including any announced prospective change) in, the laws or any
regulations thereunder of the United States or any rules, guidelines or policies
of an applicable regulatory authority for the Debenture Issuer or (b) any
official administrative pronouncement or judicial decision interpreting or
applying such laws or regulations, which amendment or change is effective or
which pronouncement or decision is announced on or after  the date of original
issuance of the Securities, the Capital Securities do not constitute, or within
90 days of the date of such opinion will not constitute, Tier 1 Capital (or its
then equivalent if the Sponsor were subject to such capital requirement);
                                                                         
provided, however, that the distribution of the Debentures in connection with
- --------  -------                                                            
the liquidation of the Trust by the Debenture Issuer shall not in and of itself
constitute a Regulatory Capital Event.

          A "Tax Event" shall occur upon receipt by the Debenture Issuer and the
Trust of an opinion of independent tax counsel experienced in such matters to
the effect that, as a result of (a) 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 (b) any official administrative pronouncement or judicial decision
interpreting or applying such laws or regulations, which amendment or change is
effective or which pronouncement or decision is announced on or after  the date
of original issuance of the Securities, there is more than an insubstantial risk
that (i) the Trust 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 Debentures, (ii) the interest payable by the Debenture Issuer on
the Debentures is not, or within 90 days of the date of such opinion will not
be, deductible by the Debenture Issuer, in whole or in part, for United States
federal income tax purposes, or (iii) the Trust 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.


                                      I-6

 
          (d) On and from the date fixed by the Trustees for any distribution of
Debentures and liquidation of the Trust: (i) the Securities will no longer be
deemed to be outstanding, (ii) the Clearing Agency or its nominee (or any
successor Clearing Agency or its nominee), as the Holder of the Capital
Securities, will receive a registered global certificate or certificates
representing the Debentures to be delivered upon such distribution, and (iii)
any certificates representing Securities not held by the Clearing Agency or its
nominee (or any successor Clearing Agency or its nominee) will be deemed to
represent beneficial interests in a Like Amount of Debentures until such
certificates are presented to the Debenture Issuer or its agent for transfer or
reissue.

          (e) The Trust may not redeem fewer than all the outstanding Securities
unless all accumulated and unpaid Distributions have been paid on all Securities
for all quarterly Distribution periods terminating on or before the date of
redemption.

          (f) The procedure with respect to redemptions or distributions of
Securities shall be as follows:

          (i)    Notice of any redemption of, or notice of distribution of
     Debentures in exchange for, the Securities (a "Redemption/Distribution
     Notice") will be given by the Trust by mail to each Holder to be redeemed
     or exchanged not fewer than 30 nor more than 60 days before the date fixed
     for redemption or exchange thereof which, in the case of a redemption, will
     be the date fixed for redemption of the Debentures. For purposes of the
     calculation of the date of redemption or exchange and the dates on which
     notices are given pursuant to this Section 4(f)(i), a
     Redemption/Distribution Notice shall be deemed to be given on the day such
     notice is first mailed by first-class mail, postage prepaid, to Holders.
     Each Redemption/Distribution Notice shall be addressed to the Holders at
     the address of each such Holder appearing in the books and records of the
     Trust. No defect in the Redemption/Distribution Notice or in the mailing of
     either thereof with respect to any Holder shall affect the validity of the
     redemption or exchange proceedings with respect to any other Holder.

          (ii)   In the event that fewer than all the outstanding Securities are
     to be redeemed, the particular Securities to be redeemed shall be selected
     on a Pro Rata basis (based upon Liquidation Amounts) not more than 60 nor
     less than 30 days prior to the date fixed for redemption from the
     outstanding Securities not previously called for redemption; provided,
                                                                  -------- 
     however, that with respect to Holders that would be required to hold less
     -------                                                                  
     than 100 but more than zero Securities as a result of such redemption, the
     Trust shall redeem Securities of each such Holder so that after such
     redemption such Holder shall hold either 100 Securities or such Holder no
     longer holds any Securities, and shall use such method (including, without
     limitation, by lot) as the Trust shall deem fair and appropriate; provided,
                                                                       -------- 
     further, that any such redemption may be made on the basis of the aggregate
     -------                                                                    
     Liquidation Amount of Securities held by each Holder thereof and may be
     made by making such adjustments as the Trust deems fair and appropriate in
     order that fractional Securities shall not thereafter remain outstanding.
     With respect to Capital Securities registered in the name of and held of
     record by the Clearing Agency or its nominee (or any successor Clearing
     Agency or its nominee) or any nominee, the distribution of the proceeds of
     such redemption will be made to the 

                                      I-7

 
     Clearing Agency and disbursed by such Clearing Agency in accordance with
     the procedures applied by such agency or nominee.

          (iii)  If Securities are to be redeemed and the Trust gives a
     Redemption/Distribution Notice (which notice will be irrevocable), then (A)
     with respect to Capital Securities issued in book-entry form, by 12:00
     noon, Eastern time, on the redemption date, provided that the Debenture
                                                 -------- ----              
     Issuer has paid the Property Trustee a sufficient amount of cash in
     connection with the related redemption or maturity of the Debentures by
     10:00 a.m., Eastern time, on the Maturity Date or the date of redemption,
     as the case requires, the Property Trustee will deposit irrevocably with
     the Clearing Agency or its nominee (or successor Clearing Agency or its
     nominee) immediately available funds sufficient to pay the applicable
     Redemption Price with respect to such Capital Securities and will give the
     Clearing Agency irrevocable instructions and authority to pay the
     Redemption Price to the relevant Clearing Agency Participants, and (B) with
     respect to Capital Securities issued in certificated form and Common
     Securities, provided that the Debenture Issuer has paid the Property
                 -------------                                           
     Trustee a sufficient amount of cash in connection with the related
     redemption or maturity of the Debentures, the Property Trustee will
     irrevocably deposit with the paying agent for the Capital Securities (if
     other than the Property Trustee) funds sufficient to pay the applicable
     Redemption Price to the Holders by check mailed to the address of the
     relevant Holder appearing on the books and records of the Trust on the
     redemption date, and provided further, that any such payment shall become
                          ----------------                                    
     due only upon surrender by the Holder of the related certificated Capital
     Securities. If a Redemption/ Distribution Notice shall have been given and
     funds deposited as required, if applicable, then immediately prior to the
     close of business on the date of such deposit, or on the redemption date,
     as applicable, Distributions will cease to accumulate on the Securities so
     called for redemption and all rights of Holders so called for redemption
     will cease, except the right of the Holders of such Securities to receive
     the Redemption Price, but without interest on such Redemption Price, and
     such Securities shall cease to be outstanding.

          (iv)   Payment of accumulated and unpaid Distributions on the
     Redemption Date of the Securities will be subject to the rights of Holders
     at the close of business on a regular record date in respect of a
     Distribution Date occurring on or prior to such Redemption Date.

          Neither the Administrative Trustees nor the Trust shall be required to
register or cause to be registered the transfer of (i) any Securities beginning
at the opening of business 15 days before the day of mailing of a notice of
redemption or any notice of selection of Securities for redemption or (ii) any
Securities selected for redemption, except the unredeemed portion of any
Security being redeemed. If any date fixed for redemption of Securities is not a
Business Day, then payment of the Redemption Price payable on such date will be
made on the next succeeding day that is a Business Day (and without any interest
or other payment in respect of any such delay). If payment of the Redemption
Price with respect to any Securities is improperly withheld or refused and not
paid either by the Property Trustee or by the Sponsor as guarantor pursuant to
the relevant Securities Guarantee, Distributions on such Securities will
continue to accumulate from the original redemption date to the actual date of
payment, in which case the actual payment date will be considered the date fixed
for redemption for purposes of calculating the Redemption Price.


                                      I-8

 
          (v)    Redemption/Distribution Notices shall be sent by the Property
     Trustee on behalf of the Trust to (A) with respect to Capital Securities
     issued in book-entry form, the Clearing Agency or its nominee (or any
     successor Clearing Agency or its nominee), (B) with respect to Capital
     Securities issued in certificated form, to the Holders thereof, and (C)
     with respect to the Common Securities, to the Holders thereof.

          (vi)   Subject to the foregoing and applicable law (including, without
     limitation, United States federal securities laws and banking laws), the
     Sponsor or any of its subsidiaries may at any time and from time to time
     purchase outstanding Capital Securities by tender, in the open market or by
     private agreement.

     5.   Voting Rights - Capital Securities.
          ---------------------------------- 

          (a) Except as provided under Sections 5(b), 6(b) and 7 and as
otherwise required by law and the Trust Agreement, the Holders of the Capital
Securities will have no voting rights.

          (b) So long as any Debentures are held by the Property Trustee, the
Trustees shall not (i) direct the time, method and place of conducting any
proceeding for any remedy available to the Debenture Trustee or executing any
trust or power conferred on such Debenture Trustee with respect to the
Debentures, (ii) waive any past default that is waivable under Section 5.07 of
the Indenture, (iii) exercise any right to rescind or annul a declaration of
acceleration of the maturity of the principal of the Debentures or (iv) consent
to any amendment, modification or termination of the Indenture or the
Debentures, where such consent shall be required, without, in each case,
obtaining the prior approval of the Holders of a Majority in Liquidation Amount
of all outstanding Capital Securities; provided, however, that where a consent
                                       --------  -------                      
under the Indenture would require the consent of each holder of Debentures
affected thereby, no such consent shall be given by the Property Trustee without
the prior approval of each Holder of the Capital Securities. The Trustees shall
not revoke any action previously authorized or approved by a vote of the Holders
of the Capital Securities except by subsequent vote of such Holders. The
Property Trustee shall notify each Holder of Capital Securities of any notice of
default with respect to the Debentures. In addition to obtaining the foregoing
approvals of such Holders of the Capital Securities, prior to taking any of the
foregoing actions, the Trustees shall obtain an opinion of counsel experienced
in such matters to the effect that the Trust will continue to be classified as a
grantor trust for United States federal income tax purposes after taking any
such action into account.

          If an Event of Default under the Trust Agreement has occurred and is
continuing and such event is attributable to the failure of the Debenture Issuer
to pay principal of or interest on the Debentures on the due date (or, in the
case of redemption, on the redemption date), then a Holder of Capital Securities
may institute a proceeding directly against the Debenture Issuer for enforcement
of payment to such Holder of the principal of or interest on a Like Amount of
Debentures (a "Direct Action") on or after the respective due date specified in
the Debentures. In connection with such Direct Action, the Common Securities
Holder will be subordinated to the rights of such Holder of Capital Securities
to the extent of any payment made by the Debenture Issuer to such Holder of
Capital Securities in such Direct Action. Except as provided in the second
preceding sentence, or except as set forth in the first sentence of Section
3.8(e) of the Trust Agreement, the Holders of 

                                      I-9

 
Capital Securities will not be able to exercise directly any other remedy
available to the holders of the Debentures.

          Any approval or direction of Holders of Capital Securities may be
given at a separate meeting of Holders of Capital Securities convened for such
purpose, at a meeting of all of the Holders of Securities in the Trust or
pursuant to written consent. The Property Trustee will cause a notice of any
meeting at which Holders of Capital Securities are entitled to vote to be mailed
to each Holder of record of Capital Securities. Each such notice will include a
statement setting forth (i) the date of such meeting or the date by which such
action is to be taken, (ii) a description of any resolution proposed for
adoption at such meeting on which such Holders are entitled to vote or of such
matter upon which written consent is sought and (iii) instructions for the
delivery of proxies or consent.

          No vote or consent of the Holders of the Capital Securities will be
required for the Trust to redeem and cancel Capital Securities or to distribute
the Debentures in accordance with the Trust Agreement and the terms of the
Securities.

          Notwithstanding that Holders of Capital Securities are entitled to
vote or consent under any of the circumstances described above, any of the
Capital Securities that are owned by the Sponsor or any Affiliate of the Sponsor
shall not be entitled to vote or consent and shall, for purposes of such vote or
consent, be treated as if they were not outstanding.

     6.   Voting Rights - Common Securities.
          --------------------------------- 

          (a) Except as provided under Sections 6(b), 6(c), and 7 or as
otherwise required by law and the Trust Agreement, the Holders of the Common
Securities will have no voting rights.

          (b) Unless a Debenture Event of Default shall have occurred and be
continuing, any Trustee may be removed at any time by the Holder of the Common
Securities. If a Debenture Event of Default has occurred and is continuing, the
Property Trustee and the Delaware Trustee may be removed at such time by the
Holders of a Majority in Liquidation Amount of the outstanding Capital
Securities. In no event will the Holders of the Capital Securities have the
right to vote to appoint, remove or replace the Administrative Trustees, which
voting rights are vested exclusively in the Sponsor as the Holder of the Common
Securities. No resignation or removal of a Trustee and no appointment of a
successor trustee shall be effective until the acceptance of appointment by the
successor trustee in accordance with the provisions of the Trust Agreement.

          (c) So long as any Debentures are held by the Property Trustee, the
Trustees shall not (i) direct the time, method and place of conducting any
proceeding for any remedy available to the Debenture Trustee, or executing any
trust or power conferred on such Debenture Trustee with respect to the
Debentures, (ii) waive any past default that is waivable under Section 5.07 of
the Indenture, (iii) exercise any right to rescind or annul a declaration of
acceleration of the maturity of the principal of the Debentures or (iv) consent
to any amendment, modification or termination of the Indenture or the
Debentures, where such consent shall be required, without, in each case,
obtaining the prior approval of the Holders of a Majority in Liquidation Amount
of all outstanding Common 

                                     I-10

 
Securities; provided, however, that where a consent under the Indenture would 
            --------  -------                      
require the consent of each holder of Debentures affected thereby, no such
consent shall be given by the Property Trustee without the prior approval of
each Holder of the Common Securities. The Trustees shall not revoke any action
previously authorized or approved by a vote of the Holders of the Common
Securities except by subsequent vote of such Holders. The Property Trustee shall
notify each Holder of Common Securities of any notice of default with respect to
the Debentures. In addition to obtaining the foregoing approvals of such Holders
of the Common Securities, prior to taking any of the foregoing actions, the
Trustees shall obtain an opinion of counsel experienced in such matters to the
effect that the Trust will continue to be classified as a grantor trust for
United States federal income tax purposes after taking any such action into
account.

          If an Event of Default under the Trust Agreement has occurred and is
continuing and such event is attributable to the failure of the Debenture Issuer
to pay principal of or interest on the Debentures on the due date (or in the
case of redemption, on the redemption date), then a Holder of Common Securities
may institute a Direct Action directly against the Debenture Issuer for
enforcement of payment to such Holder of the principal of or interest on a Like
Amount of Debentures on or after the respective due date specified in the
Debentures. In connection with such Direct Action, the rights of the Common
Securities Holder will be subordinated to the rights of Holders of Capital
Securities in respect of any payment from the Debenture Issuer in such Direct
Action. Except as provided in the second preceding sentence, the Holders of
Common Securities will not be able to exercise directly any other remedy
available to the holders of the Debentures.

          Any approval or direction of Holders of Common Securities may be given
at a separate meeting of Holders of Common Securities convened for such purpose,
at a meeting of all of the Holders of Securities in the Trust or pursuant to
written consent. The Administrative Trustees will cause a notice of any meeting
at which Holders of Common Securities are entitled to vote, or of any matter
upon which action by written consent of such Holders is to be taken, to be
mailed to each Holder of record of Common Securities. Each such notice will
include a statement setting forth (i) the date of such meeting or the date by
which such action is to be taken, (ii) a description of any resolution proposed
for adoption at such meeting on which such Holders are entitled to vote or of
such matter upon which written consent is sought, and (iii) instructions for the
delivery of proxies or consents.

          No vote or consent of the Holders of the Common Securities will be
required for the Trust to redeem and cancel Common Securities or to distribute
the Debentures in accordance with the Trust Agreement  and the terms of the
Securities.

     7.   Amendments to Trust Agreement.
          ----------------------------- 

          In addition to the requirements set out in Section 12.1 of the Trust
Agreement, the Trust Agreement may be amended from time to time by the Sponsor,
the Property Trustee and the Administrative Trustees without the consent of the
Holders to (i) cure any ambiguity, correct or supplement any provisions in the
Trust Agreement that may be inconsistent with any other provisions, or make any
other provisions with respect to matters or questions arising under the Trust
Agreement which shall not be inconsistent with the other provisions of the Trust
Agreement, (ii) 

                                     I-11

 
modify, eliminate or add to any provisions of the Trust Agreement to such extent
as shall be necessary to ensure that the Trust will be classified for United
States federal income tax purposes as a grantor trust at all times that any
Securities are outstanding or to ensure that the Trust will not be required to
register as an Investment Company under the Investment Company Act or (iii)
modify, eliminate or add any provisions of the Trust Agreement to such extent as
shall be necessary to enable the Trust or the Sponsor to conduct an Exchange
Offer in the manner contemplated by the Registration Rights Agreement; provided,
                                                                       --------
however, that in each case (other than an amendment pursuant to clause (ii)
- -------                               
above), such action shall not adversely affect in any material respect the
interests of any Holder, and any such amendments of the Trust Agreement shall
become effective when notice thereof is given to the Holders. The Trust
Agreement may also be amended by the Trustees and the Sponsor with (i) the
consent of Holders representing a Majority in Liquidation Amount of all
outstanding Securities, and (ii) receipt by the Trustees of an Opinion of
Counsel to the effect that such amendment or the exercise of any power granted
to the Trustees in accordance with such amendment will not affect the Trust's
status as a grantor trust for United States federal income tax purposes or the
Trust's exemption from status as an Investment Company under the Investment
Company Act; provided, however, that, without the consent of each Holder of
             --------  -------                   
Trust Securities, the Trust Agreement may not be amended to (i) change the
amount or timing of any Distribution on, or the payment required to be made in
respect of, the Trust Securities as of a specified date or (ii) restrict the
right of a Holder of Trust Securities to institute suit for the enforcement of
any such payment on or after such date.

     8.   Pro Rata.
          -------- 

          A reference in these terms of the Securities to any payment,
distribution or treatment as being "Pro Rata" shall mean pro rata to each Holder
                                                         --------               
according to the aggregate liquidation amount of the Securities held by such
Holder in relation to the aggregate liquidation amount of all Securities
outstanding unless, in relation to a payment, an Event of Default under the
Trust Agreement has occurred and is continuing, in which case any funds
available to make such payment shall be paid first to each Holder of the Capital
Securities pro rata according to the aggregate liquidation amount of Capital
           --------                                                         
Securities held by such Holder relative to the aggregate liquidation amount of
all Capital Securities outstanding and then, only after satisfaction of all
amounts owed to the Holders of the Capital Securities, to each Holder of Common
Securities pro rata according to the aggregate liquidation amount of Common
Securities held by such Holder relative to the aggregate liquidation amount of
all Common Securities outstanding.

     9.   Ranking.
          ------- 

          The Capital Securities rank pari passu with the Common Securities and
                                      ---- -----                               
payment thereon shall be made Pro Rata with the Common Securities, except that,
if an Event of Default under the Trust Agreement occurs and is continuing, no
payments in respect of Distributions on, or payments upon liquidation,
redemption or otherwise with respect to, the Common Securities shall be made
until the Holders of the Capital Securities shall be paid in full, all Allocable
Amounts due on or in respect of, the Distributions, Redemption Price,
Liquidation Distribution and any other payments to which they are entitled at
such time.


                                     I-12

 
     10.  Acceptance of Capital Securities Guarantee, Common Securities
          -------------------------------------------------------------
          Guarantee. Indenture and Debentures.
          ----------------------------------- 

          Each Holder of Capital Securities and Common Securities, by the
acceptance thereof, agrees to the provisions of the Capital Securities
Guarantee, the Common Securities Guarantee, the Indenture and the Debentures, as
applicable, including the subordination provisions therein.


     11.  No Preemptive Rights.
          -------------------- 

          Neither the issuance of Capital Securities, nor the issuance of Common
Securities is subject to preemptive or other similar rights. The Holders shall
have no preemptive or similar rights to subscribe for any additional securities.

     12.  Miscellaneous.
          ------------- 

          These terms constitute a part of the Trust Agreement.

          The Sponsor will provide a copy of the Trust Agreement, the Capital
Securities Guarantee or the Common Securities Guarantee, as applicable, and the
Indenture (including any supplemental indenture) to a Holder without charge upon
written request to the Trust at its principal place of business.


                                     I-13

 
                                  EXHIBIT A-1

                      FORM OF CAPITAL SECURITY CERTIFICATE

                           [FORM OF FACE OF SECURITY]

          [IF THIS CAPITAL SECURITY IS A GLOBAL CAPITAL SECURITY, INSERT: THIS
CAPITAL SECURITY IS A GLOBAL CAPITAL SECURITY WITHIN THE MEANING OF THE TRUST
AGREEMENT HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE
DEPOSITORY TRUST COMPANY (THE "CLEARING AGENCY") OR A NOMINEE OF THE CLEARING
AGENCY. THIS CAPITAL SECURITY IS EXCHANGEABLE FOR CAPITAL SECURITIES REGISTERED
IN THE NAME OF A PERSON OTHER THAN THE CLEARING AGENCY OR ITS NOMINEE ONLY IN
THE LIMITED CIRCUMSTANCES DESCRIBED IN THE TRUST AGREEMENT AND NO TRANSFER OF
THIS CAPITAL SECURITY (OTHER THAN A TRANSFER OF THIS CAPITAL SECURITY AS A WHOLE
BY THE CLEARING AGENCY TO A NOMINEE OF THE CLEARING AGENCY OR BY A NOMINEE OF
THE CLEARING AGENCY TO THE CLEARING AGENCY OR ANOTHER NOMINEE OF THE CLEARING
AGENCY) MAY BE REGISTERED EXCEPT IN LIMITED CIRCUMSTANCES.

          UNLESS THIS CAPITAL SECURITY IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE CLEARING AGENCY TO THE TRUST OR ITS AGENT FOR REGISTRATION
OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CAPITAL SECURITY ISSUED IS REGISTERED
IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED
REPRESENTATIVE OF THE CLEARING AGENCY AND ANY PAYMENT HEREON IS MADE TO CEDE &
CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO
ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
INTEREST HEREIN.]

          THIS CAPITAL SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS OR ANY
OTHER APPLICABLE SECURITIES LAW. NEITHER THIS CAPITAL 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, REGISTRATION.

          THE HOLDER OF THIS CAPITAL SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO
OFFER, SELL OR OTHERWISE TRANSFER THIS CAPITAL SECURITY, PRIOR TO THE DATE (THE
"RESALE RESTRICTION TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF THE
ORIGINAL ISSUANCE DATE HEREOF AND THE LAST DATE ON WHICH GREATER BAY BANCORP
(THE "CORPORATION") OR ANY "AFFILIATE" OF THE CORPORATION WAS THE OWNER OF THIS
CAPITAL SECURITY (OR ANY PREDECESSOR OF THIS CAPITAL SECURITY) ONLY (A) TO THE

                                     A1-1

 
CORPORATION, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) SO LONG AS THIS CAPITAL SECURITY IS
ELIGIBLE FOR RESALE 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, (D) TO AN INSTITUTIONAL "ACCREDITED
INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH (A)(1), (2), (3) OR (7) OF RULE 501
UNDER THE SECURITIES ACT THAT IS ACQUIRING THIS CAPITAL SECURITY FOR ITS OWN
ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL 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 (E) PURSUANT TO ANY
OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS UNDER THE
SECURITIES ACT, SUBJECT TO THE RIGHT OF GBB CAPITAL II (THE "TRUST") AND THE
CORPORATION PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER (i) PURSUANT TO CLAUSE (D)
OR (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR
OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND (ii) PURSUANT TO CLAUSE (D)
TO REQUIRE THAT THE TRANSFEROR DELIVER TO THE TRUST A LETTER FROM THE TRANSFEREE
SUBSTANTIALLY IN THE FORM OF ANNEX A TO THE OFFERING MEMORANDUM DATED AUGUST 7,
1998. SUCH HOLDER FURTHER AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM
THIS CAPITAL SECURITY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF
THIS LEGEND.

          THE HOLDER OF THIS CAPITAL SECURITY BY ITS ACCEPTANCE HEREOF ALSO
AGREES, REPRESENTS AND WARRANTS THAT IT IS NOT AN EMPLOYEE BENEFIT, INDIVIDUAL
RETIREMENT ACCOUNT OR OTHER PLAN OR ARRANGEMENT SUBJECT TO TITLE I OF THE
EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED ("ERISA"), OR
SECTION 4975 OF THE INTERNAL REVENUE CODE OF 1986, AS AMENDED (THE "CODE") (EACH
A "PLAN"), OR AN ENTITY WHOSE UNDERLYING ASSETS INCLUDE "PLAN ASSETS" BY REASON
OF ANY PLAN'S INVESTMENT IN THE ENTITY AND NO PERSON INVESTING "PLAN ASSETS" OF
ANY PLAN MAY ACQUIRE OR HOLD THE CAPITAL SECURITIES OR ANY INTEREST THEREIN,
UNLESS SUCH PURCHASER OR HOLDER IS ELIGIBLE FOR THE EXEMPTIVE RELIEF AVAILABLE
UNDER U.S. DEPARTMENT OF LABOR PROHIBITED TRANSACTION CLASS EXEMPTION 96-23, 95-
60, 91-38, 90-1 OR 84-14 OR ANOTHER APPLICABLE EXEMPTION OR ITS PURCHASE AND
HOLDING OF CAPITAL SECURITIES IS NOT PROHIBITED BY SECTION 406 OF ERISA OR
SECTION 4975 OF THE CODE WITH RESPECT TO SUCH PURCHASE OR HOLDING. ANY PURCHASER
OR HOLDER OF THE CAPITAL SECURITIES OR ANY INTEREST THEREIN WILL BE DEEMED TO
HAVE REPRESENTED BY ITS PURCHASE AND HOLDING THEREOF THAT EITHER (i) IT IS
NOT AN EMPLOYEE BENEFIT PLAN WITHIN THE MEANING OF SECTION 3(3) OF ERISA, OR A
PLAN TO WHICH SECTION 4975 OF THE CODE IS APPLICABLE, A TRUSTEE OR OTHER PERSON
ACTING ON BEHALF OF AN EMPLOYEE BENEFIT PLAN OR PLAN, OR 

                                     A1-2

 
ANY OTHER PERSON OR ENTITY USING THE ASSETS OF ANY EMPLOYEE BENEFIT PLAN OR PLAN
TO FINANCE SUCH PURCHASE, OR (ii) SUCH PURCHASE WILL NOT RESULT IN A PROHIBITED
TRANSACTION UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE FOR WHICH
THERE IS NO APPLICABLE STATUTORY OR ADMINISTRATIVE EXEMPTION.

     THE CAPITAL SECURITIES WILL BE ISSUED AND MAY BE TRANSFERRED ONLY IN BLOCKS
HAVING A LIQUIDATION AMOUNT OF NOT LESS THAN $100,000 (100 CAPITAL SECURITIES)
AND MULTIPLES OF $1,000 IN EXCESS THEREOF. ANY ATTEMPTED TRANSFER OF CAPITAL
SECURITIES IN A BLOCK HAVING A LIQUIDATION AMOUNT OF LESS THAN $100,000 (100
CAPITAL SECURITIES) SHALL BE DEEMED TO BE VOID AND OF NO LEGAL EFFECT
WHATSOEVER. ANY SUCH PURPORTED TRANSFEREE SHALL BE DEEMED NOT TO BE THE HOLDER
OF SUCH CAPITAL SECURITIES FOR ANY PURPOSE, INCLUDING, BUT NOT LIMITED TO, THE
RECEIPT OF DISTRIBUTIONS ON SUCH CAPITAL SECURITIES, AND SUCH PURPORTED
TRANSFEREE SHALL BE DEEMED TO HAVE NO INTEREST WHATSOEVER IN SUCH CAPITAL
SECURITIES.

     THE HOLDER OF THIS CAPITAL SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO BE
BOUND BY THE REGISTRATION RIGHTS AGREEMENT DATED AS OF AUGUST 7, 1998, BY AND
AMONG THE TRUST, THE SPONSOR AND THE INITIAL PURCHASER NAMED THEREIN, AS AMENDED
FROM TIME TO TIME.

                                     A1-3

 
Certificate Number: [                    ]         Aggregate Liquidation
                     --------------------
                                                   Amount: $[               ]
                                                             ---------------

CUSIP Number:[           ]
              -----------

                   Certificate Evidencing Capital Securities

                                       of

                                 GBB CAPITAL II

                   Floating Rate Capital Securities, Series A
                (liquidation amount $1,000 per Capital Security)

          GBB Capital II, a statutory business trust created under the laws of
the State of Delaware (the "Trust"), hereby certifies that [      ] (the
"Holder") is the registered owner of $[_________]  in aggregate liquidation
amount of Capital Securities of the Trust]/1/ [the aggregate liquidation amount
of Capital Securities of the Trust specified in Schedule A hereto]/2/
representing undivided preferred beneficial interests in the assets of the Trust
designated the Floating Rate Capital Securities, Series A (liquidation amount
$1,000 per Capital Security) (the "Capital Securities"). The Capital Securities
are transferable on the books and records of the Trust, in person or by a duly
authorized attorney, upon surrender of this certificate duly endorsed and in
proper form for transfer. The designation, rights, privileges, restrictions,
preferences and other terms and provisions of the Capital Securities represented
hereby are issued and shall in all respects be subject to the provisions of the
Amended and Restated Trust Agreement of the Trust, dated as of August 12, 1998,
as the same may be amended from time to time (the "Trust Agreement"), including
the designation of the terms of the Capital Securities as set forth in Annex I
to the Trust Agreement. Capitalized terms used but not defined herein shall have
the meaning given them in the Trust Agreement. The Sponsor will provide a copy
of the Trust Agreement, the Capital Securities Guarantee and the Indenture
(including any supplemental indenture) to a Holder without charge upon written
request to the Trust at its principal place of business.

          Upon receipt of this Certificate, the Holder is bound by the Trust
Agreement and is entitled to the benefits thereunder and to the benefits of the
Capital Securities Guarantee to the extent provided therein.

          By acceptance hereof, the Holder agrees, for United States federal
income tax purposes, to treat the Debentures as indebtedness and the Capital
Securities as evidence of indirect beneficial ownership in the Debentures.

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

         1/  Insert in Definitive Capital Securities only.
         -

         2/  Insert in Global Capital Securities only.
         -

                                     A1-4

 
          IN WITNESS WHEREOF, the Trust has executed this certificate this
[       ] day of [           ,1998].
 -------          -----------                  
                              GBB CAPITAL II


                             By:
                                ------------------------------------
                                 Steven C. Smith
                                 Administrative Trustee



                PROPERTY TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     This is one of the Floating Rate Capital Securities, Series A of GBB
CAPITAL II referred to in the within-mentioned Trust Agreement.

Dated: [            ,    ]
        ------------  --- 

                              WILMINGTON TRUST COMPANY,
                              not in its individual capacity but solely
                              as Property Trustee

                             By:
                                ------------------------------------
                                Authorized Signatory


                                     A1-5

 
                         [FORM OF REVERSE OF SECURITY]


          Distributions on each Capital Security will be payable at a rate per
annum, reset quarterly, equal to 3-month LIBOR (as defined in the Trust
Agreement) plus 150 basis points (the "Coupon Rate"), such rate being the rate
of interest payable on the Debentures to be held by the Property Trustee.
Distributions in arrears for more than one quarterly period will bear interest
thereon compounded quarterly at the Coupon Rate (to the extent permitted by
applicable law). Pursuant to the Registration Rights Agreement, in certain
limited circumstances the Debenture Issuer will be required to pay Liquidated
Damages (as defined in the Registration Rights Agreement) with respect to the
Debentures. The term "Distributions," as used herein, includes such cash
distributions and any and all such interest and Liquidated Damages, if any,
payable unless otherwise stated. A Distribution is payable only to the extent
that payments are made in respect of the Debentures held by the Property Trustee
and to the extent the Property Trustee has funds legally available therefor.

          Distributions on the Capital Securities will be cumulative, will
accumulate from the most recent date to which Distributions have been paid or,
if no Distributions have been paid, from August 12, 1998 and will be payable
quarterly in arrears, on March 15, June 15, September 15 and December 15 of each
year, commencing December 15, 1998, except as otherwise described below.
Distributions will be computed on the basis of the actual number of days elapsed
in such period and a 360-day year. As long as no Event of Default has occurred
and is continuing under the Indenture, the Debenture Issuer has the right under
the Indenture to defer payments of interest by extending the interest payment
period at any time and from time to time on the Debentures for a period not
exceeding 20 consecutive calendar quarterly periods, including the first such
quarterly period during such extension period (each an "Extension Period"),
provided that no Extension Period shall end on a date other than an Interest
- -------- ----                                                               
Payment Date for the Debentures or extend beyond the Maturity Date of the
Debentures. As a consequence of such deferral, Distributions (other than
Liquidated Damages, if any) will also be deferred. Notwithstanding such
deferral, quarterly Distributions will continue to accumulate with interest
thereon (to the extent permitted by applicable law, but not at a rate exceeding
the rate of interest then accruing on the Debentures) at the applicable periodic
Coupon Rate compounded quarterly during any such Extension Period. Prior to the
termination of any Extension Period, the Debenture Issuer may further defer
payments of interest by further extending such Extension Period; provided that
                                                                 -------- ----
such Extension Period, together with all such previous and further extensions
within such Extension Period, may not (i) exceed 20 consecutive quarterly
periods, including the first quarterly period during such Extension Period, (ii)
end on a date other than an Interest Payment Date for the Debentures or (iii)
extend beyond the Maturity Date of the Debentures. Payments of accumulated
Distributions will be payable to Holders as they appear on the books and records
of the Trust on the record date immediately preceding the end of the Extension
Period. Upon the termination of any Extension Period and the payment of all
amounts then due, the Debenture Issuer may commence a new Extension Period,
subject to the above requirements.

          Subject to receipt by the Sponsor of any and all required regulatory
approvals and to certain other conditions set forth in the Trust Agreement and
the Indenture, the Property Trustee may, at the direction of the Sponsor, at any
time dissolve the Trust and after satisfaction of liabilities to creditors of
the Trust as provided by applicable law, cause the Debentures to be distributed
to the 

                                     A1-6

 
Holders of the Securities in liquidation of the Trust or, simultaneously with
any redemption of the Debentures, cause a Like Amount of the Securities to be
redeemed by the Trust.

          The Capital Securities shall be redeemable as provided in the Trust
Agreement.


                                     A1-7

 
                               -----------------
                                   ASSIGNMENT
                               -----------------


FOR VALUE RECEIVED, the undersigned hereby assigns and transfers this Capital
Security Certificate to:


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

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

- --------------------------------------------------------------------------------
           (Assignee's social security or tax identification number)


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

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

- --------------------------------------------------------------------------------
                       (Address and zip code of assignee)

and irrevocably appoints

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

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

- ---------------------------------------------------------------------------agent
to transfer this Capital Security Certificate on the books of the Trust. The
agent may substitute another to act for him or her.

Date:
      ----------------

Signature:
          --------------------------------------------------------------------
(Sign exactly as your name appears on the other side of this Capital Security
Certificate)

Signature Guarantee:
                    ----------------------------------------------------------


 
- ----------------
     Signature must be guaranteed by an ''eligible guarantor institution" that
     is a bank, stockbroker, savings and loan association or credit union
     meeting the requirements of the Registrar, which requirements include
     membership or participation in the Securities Transfer Agents Medallion
     Program ("STAMP") or such other "signature guarantee program" as may be
     determined by the Registrar in addition to, or in substitution for, STAMP,
     all in accordance with the Securities Exchange Act of 1934, as amended.


                                     A1-8

 
[INCLUDE THE FOLLOWING IF THE CAPITAL SECURITY BEARS A RESTRICTED SECURITIES
 LEGEND]

In connection with any transfer of any of the Capital Securities evidenced by
this Certificate, the undersigned confirms that such Capital Securities are
being:

CHECK ONE BOX BELOW

     (1) [_]   exchanged for the undersigned's own account without transfer; or

     (2) [_]   transferred pursuant to and in compliance with Rule 144A under
               the Securities Act of 1933, as amended; or

     (3) [_]   transferred to an institutional "accredited investor" within the
               meaning of subparagraph (a)(1), (2), (3) or (7) of Rule 501 under
               the Securities Act of 1933 that is acquiring the Capital
               Securities for its own account, or for the account of such an
               institutional "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 of 1933, as
               amended; or

     (4) [_]   transferred pursuant to another available exemption from the
               registration requirements of the Securities Act of 1933, as
               amended; or

     (5) [_]   transferred pursuant to an effective registration statement.

Unless one of the boxes is checked, the Registrar will refuse to register any of
the Capital Securities evidenced by this Certificate in the name of any Person
other than the Holder hereof; provided, however, that if box (3) or (4) is
                              --------  -------                           
checked, the Registrar may require, prior to registering any such transfer of
the Capital Securities, such legal opinions, certifications and other
information as the Trust has reasonably requested to confirm that such transfer
is being made pursuant to an exemption from, or in a transaction not subject to,
the registration requirements of the Securities Act of 1933, as amended, such as
the exemption provided by Rule 144 under such Act; provided, further, that (i)
                                                   --------  -------          
if box (2) is checked, by acceptance of this Certificate, the transferee shall
be deemed to have certified that it is a "qualified institutional buyer" (as
defined in Rule 144A) ("QIB") acquiring the Capital Securities for its own
account or for the account of another QIB over which it exercises sole
investment discretion and that it is aware that the Holder is relying upon the
exemption from registration afforded by Rule 144A in respect of the Holder's
transfer of Capital Securities to it or (ii) if box (3) is checked, the
transferee must also provide to the Registrar a Transferee Letter of
Representation in the form attached to the Offering Memorandum of the Trust
dated August 7, 1998; provided, further, that after the date that a registration
                      --------  -------                                         
statement has been filed and so long as such Registration Statement continues to
be effective, only then may the Registrar permit transfers for which box (5) has
been checked.


                                   ----------------------------------- 
                                         Signature

                                     A1-9

 
                                  EXHIBIT A-2

                      FORM OF COMMON SECURITY CERTIFICATE

     THIS COMMON SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE SECURITIES LAWS OR ANY
OTHER APPLICABLE SECURITIES LAW. NEITHER THIS COMMON 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, REGISTRATION.

          THE HOLDER OF THIS COMMON SECURITY BY ITS ACCEPTANCE HEREOF AGREES TO
OFFER, SELL OR OTHERWISE TRANSFER THIS COMMON SECURITY, PRIOR TO THE DATE (THE
"RESALE RESTRICTION TERMINATION DATE") WHICH IS TWO YEARS AFTER THE LATER OF THE
ORIGINAL ISSUANCE DATE HEREOF AND THE LAST DATE ON WHICH GREATER BAY BANCORP
(THE "CORPORATION") OR ANY "AFFILIATE" OF THE CORPORATION WAS THE OWNER OF THIS
COMMON SECURITY (OR ANY PREDECESSOR OF THIS COMMON SECURITY) ONLY (A) TO THE
CORPORATION, (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BEEN DECLARED
EFFECTIVE UNDER THE SECURITIES ACT, (C) SO LONG AS  THIS COMMON SECURITY IS
ELIGIBLE FOR RESALE 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, (D) TO AN INSTITUTIONAL "ACCREDITED
INVESTOR" WITHIN THE MEANING OF SUBPARAGRAPH (A)(1), (2), (3) OR (7) OF RULE 501
UNDER THE SECURITIES ACT THAT IS ACQUIRING THIS COMMON SECURITY FOR ITS OWN
ACCOUNT, OR FOR THE ACCOUNT OF SUCH AN INSTITUTIONAL 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 (E) PURSUANT TO
ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS UNDER THE
SECURITIES ACT, SUBJECT TO THE RIGHT OF GBB CAPITAL II (THE "TRUST") AND THE
CORPORATION PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER (i) PURSUANT TO CLAUSE (D)
OR (E) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATIONS AND/OR
OTHER INFORMATION SATISFACTORY TO EACH OF THEM, AND (ii) PURSUANT TO CLAUSE (D)
TO REQUIRE THAT TRANSFEROR DELIVER TO THE TRUST A LETTER FROM THE TRANSFEREE
SUBSTANTIALLY IN THE FORM OF ANNEX A TO THE OFFERING MEMORANDUM DATED AUGUST 7,
1998. SUCH HOLDER FURTHER AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM
THIS COMMON SECURITY IS TRANSFERRED A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS
LEGEND.

                                     A2-1

 
                    Certificate Evidencing Common Securities

                                       of

                                 GBB CAPITAL II

                        Floating Rate Common Securities
                (liquidation amount $1,000 per Common Security)

          GBB CAPITAL II, a statutory business trust created under the laws of
the State of Delaware (the "Trust"), hereby certifies that Greater Bay Bancorp
(the "Holder") is the registered owner of [__________] common securities of the
Trust representing undivided beneficial interests in the assets of the Trust
designated the Floating Rate Common Securities (liquidation amount $1,000 per
Common Security) (the "Common Securities").  Subject to the terms of the Trust
Agreement (as defined below), the Common Securities are transferable on the
books and records of the Trust, in person or by a duly authorized attorney, upon
surrender of this Certificate duly endorsed and in proper form for transfer. The
designation, rights, privileges, restrictions, preferences and other terms and
provisions of the Common Securities represented hereby are issued and shall in
all respects be subject to the provisions of the Amended and Restated Trust
Agreement of the Trust dated as of August 12, 1998, as the same may be amended
from time to time (the "Trust Agreement"), including the designation of the
terms of the Common Securities as set forth in Annex I to the Trust Agreement.
Capitalized terms used but not defined herein shall have the meaning given them
in the Trust Agreement. The Sponsor will provide a copy of the Trust Agreement,
the Common Securities Guarantee and the Indenture (including any supplemental
indenture) to a Holder without charge upon written request to the Trust at its
principal place of business.

          Upon receipt of this Certificate, the Holder is bound by the Trust
Agreement and is entitled to the benefits thereunder and to the benefits of the
Common Securities Guarantee to the extent provided therein.

          By acceptance hereof, the Holder agrees to treat, for United States
federal income tax purposes, the Debentures as indebtedness and the Common
Securities as evidence of indirect beneficial ownership in the Debentures.

          IN WITNESS WHEREOF, the Trust has executed this certificate this
[__________] day of [    , 1998].

                              GBB CAPITAL II


                              By:
                                 -------------------------------------
                                 Steven C. Smith
                                 Administrative Trustee


                                     A2-2

 
                         [FORM OF REVERSE OF SECURITY]

          Distributions on each Common Security will be payable at a rate per
annum, reset quarterly, equal to 3-month LIBOR (as defined in the Trust
Agreement) plus 150 basis points (the "Coupon Rate"), such rate being the rate
of interest payable on the Debentures to be held by the Property Trustee.
Distributions in arrears for more than one quarterly period will bear interest
thereon compounded quarterly at the Coupon Rate (to the extent permitted by
applicable law). Pursuant to the Registration Rights Agreement, in certain
limited circumstances the Debenture Issuer will be required to pay Liquidated
Damages (as defined in the Registration Rights Agreement) with respect to the
Debentures. The term "Distributions", as used herein, includes such cash
distributions and any and all such interest and Liquidated Damages, if any,
payable unless otherwise stated. A Distribution is payable only to the extent
that payments are made in respect of the Debentures held by the Property Trustee
and to the extent the Property Trustee has funds legally available therefor.

          Distributions on the Common Securities will be cumulative, will accrue
from the most recent date to which Distributions have been paid or, if no
Distributions have been paid, from August 12, 1998 and will be payable quarterly
in arrears, on March 15, June 15, September 15 and December 15, of each year,
commencing December 15, 1998, except as otherwise described below. Distributions
will be computed on the basis of the actual number of days elapsed in such
period and a 360-day year. As long as no Event of Default has occurred and is
continuing under the Indenture, the Debenture Issuer has the right under the
Indenture to defer payments of interest by extending the interest payment period
at any time and from time to time on the Debentures for a period not exceeding
20 consecutive calendar quarterly periods, including the first such quarterly
period during such extension period (each an "Extension Period"), provided that
                                                                  -------- ----
no Extension Period shall end on a date other than an Interest Payment Date for
the Debentures or extend beyond the Maturity Date of the Debentures. As a
consequence of such deferral, Distributions will also be deferred.
Notwithstanding such deferral, quarterly Distributions will continue to
accumulate with interest thereon (to the extent permitted by applicable law, but
not at a rate exceeding the rate of interest then accruing on the Debentures) at
the applicable periodic Coupon Rate compounded quarterly during any such
Extension Period. Prior to the termination of any Extension Period, the
Debenture Issuer may further defer payments of interest by further extending
such Extension Period; provided that such Extension Period, together with all
                       -------- ----                                         
such previous and further extensions within such Extension Period, may not (i)
exceed 20 consecutive quarterly periods, including the first quarterly period
during such Extension Period, (ii) end on a date other than an Interest Payment
Date for the Debentures or (iii) extend beyond the Maturity Date of the
Debentures. Payments of accrued Distributions will be payable to Holders as they
appear on the books and records of the Trust on the record date immediately
preceding the end of the Extension Period. Upon the termination of any Extension
Period and the payment of all amounts then due, the Debenture Issuer may
commence a new Extension Period, subject to the above requirements.

          Subject to the receipt by the Sponsor of any and all required
regulatory approvals and to certain other conditions set forth in the Trust
Agreement and the Indenture, the Property Trustee may, at the direction of the
Sponsor, at any time dissolve the Trust and cause the Debentures to be
distributed to the Holders of the Securities in liquidation of the Trust or,
simultaneously with any redemption of the Debentures, cause a Like Amount of the
Securities to be redeemed by the Trust.


                                     A2-3

 
          The Common Securities shall be redeemable as provided in the Trust
Agreement.

          Under certain circumstances, the rights of the holders of the Common
Securities shall be subordinate to the rights of the holders of the Capital
Securities, as provided in the Trust Agreement.

                                     A2-4