Document:

<PAGE>

             REVISED ASSUMPTION AGREEMENT BY AND BETWEEN CALIFORNIA
               COMMUNITY BANCSHARES, INC. AND PLACER CAPITAL CO.

WHEREAS, California Community Bancshares, Inc. ("CCBI") desires to grant options
to directors, officers and employees of CCBI and of its subsidiaries Placer
Capital Co. ("PCC") and Placer Sierra Bank ("PSB") and of other affiliated
companies of CCBI and PCC; and

WHEREAS, CCBI has filed a registration statement on Form S-8 (the "Registration
Statement") with the Securities and Exchange Commission registering the grant of
options and the issuance of shares of CCBI common stock upon exercise of options
with the Securities and Exchange Commission which registration statement became
effective on December 9, 1999; and

WHEREAS, in addition to the Registration Statement it was also necessary for
CCBI to obtain a stock permit from the California Department of Corporations
(the "DOC"); and

WHEREAS, as it is presently the policy of the DOC that stock option plans cannot
contain a provision which allows for the acceleration of unvested options in the
event of a merger, acquisition or other change of control of the issuer as
defined by this agreement (a "Change of Control") to obtain a stock permit, it
is necessary to amend the CCBI stock option plan to eliminate the acceleration
of options upon a Change of Control;

WHEREAS, the DOC has indicated that they are in the process of re-evaluating
this policy; and

WHEREAS, CCBI has determined that in order to attract and retain qualified
directors, officers, and employees for CCBI and for its affiliates, it is in the
best interest of CCBI and its shareholders that the vesting of stock options
accelerate in the event of a Change of Control; and

WHEREAS, the stock option plan of PCC allows the grant of options to its
directors, officers and employees, as well as to the directors, officers and
employees of its affiliates; and

WHEREAS, the grant of stock options by PCC qualifies for the exemption from the
registration requirements of the SECURITIES EXCHANGE ACT OF 1933 and from the
qualification requirements of the DOC pursuant to SEC Rule 701 and Section
25102(o) of the CALIFORNIA CORPORATIONS CODE, respectively; and

WHEREAS, the PCC stock option plan allows for the acceleration of options in the
event of a Change of Control; and

WHEREAS, PCC has previously granted options to the directors, officers and
employees of PCC, PSB, and of other affiliates of CCBI; and

WHEREAS, CCBI and PCC have determined that it is in their respective best
interests and in the best interests and to the advantage of their respective
shareholders, for PCC to grant options to the directors, officers and employees
of CCBI and of PCC, PSB, of other affiliates of CCBI and PCC in consideration of
CCBI agreeing to assume such options upon the occurrence of such certain events
as set forth in this agreement.

<PAGE>

NOW THEREFORE, in consideration of the mutual promises contained in this
agreement, CCBI and PCC hereby agree as follows:

     1. PCC hereby agrees to grant options to directors, officers and employees
of CCBI and of PCC, PSB and other affiliates of PCC and CCBI and to take such
steps as are necessary to qualify such grants for the exemptions provided by SEC
Rule 701 and Section 25102(o) of the CALIFORNIA CORPORATIONS CODE;

     2. CCBI hereby agrees as follows:

           a) CCBI will, in the event the CCBI stock option plan does not at
that time contain such a provision, amend its stock option plan to provide for
the acceleration of stock options upon the Change of Control on the earlier of:

                   i)  The reversal by the DOC of its nonacceleration policy; or

                   ii) CCBI becoming exempt from the qualification requirements
of the CALIFORNIA CORPORATIONS CODE by having registered its common stock on
NASDAQ's national market system.

           b) Immediately after the occurrence of the earliest of the events
described in Section 2 (a) to this Agreement, CCBI will assume the stock options
previously granted by PCC as well as the options granted by PCC pursuant to this
agreement and provide new option agreements to the PCC optionees to purchase
shares of CCBI common stock pursuant to an appropriate conversion ratio.

           c) In the event a proposed transaction constituting a Change of
Control of CCBI is presented to CCBI prior to the occurrence of the events
described Section 2 (a) and (b) of this Agreement, CCBI shall assure that such
transaction shall be expressly conditioned upon the acquiring party assuming all
of PCC'S outstanding options, including the acceleration of vesting.

     3. For purposes of this agreement, a "Change of Control" shall mean:

           a) the consummation of a plan of dissolution or liquidation of CCBI;

           b) the consummation of a plan of reorganization, merger or
consolidation involving CCBI, except for a reorganization, merger or
consolidation where (A) the shareholders of CCBI immediately prior to such
reorganization, merger or consolidation own directly or indirectly at least 50%
of the combined voting power of the outstanding voting securities of the
corporation resulting from such reorganization, merger or consolidation (the
"Surviving Corporation") in substantially the same proportion as their ownership
of voting securities of CCBI immediately prior to such reorganization, merger or
consolidation and the individuals who were members of the Incumbent Board
immediately prior to the execution of the agreement providing for such
reorganization, merger or consolidation constitute at least 50% of the members
of the board of directors of the Surviving Corporation, or a corporation
beneficially directly or indirectly owning a majority of the voting securities
of the Surviving Corporation, or (C) CCBI is reorganized, merged or consolidated
with a corporation in which any shareholder

                                      -2-
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owning at least 50% of the combined voting power of the outstanding voting
securities of CCBI immediately prior to such reorganization, merger or
consolidation, owns at least 50% of the combined voting power of the outstanding
voting securities of the corporation resulting from such reorganization, merger
or consolidation;

           c) the sale of all or substantially all of the assets of CCBI to
another Person;

           d) the acquisition of beneficial ownership of stock representing more
than fifty percent (50%) of the voting power of CCBI then outstanding by another
Person.

     4. Further Actions. Each party agrees to perform any further acts and
execute and deliver any further documents reasonably necessary to carry out the
provisions of this Agreement.

     5. Successors and Assigns. Except as explicitly provided herein to the
contrary, this Agreement shall be binding upon and inure to the benefit of the
parties, their respective successors and permitted assigns.

     6. Severability. If any portion of this Agreement shall be held by a court
of competent jurisdiction to be invalid, void or otherwise unenforceable, the
remaining provisions shall remain enforceable to the fullest extent permitted by
law if enforcement would not frustrate the overall intent of the parties (as
such intent is manifested by all provisions of the Agreement, including such
invalid, void or otherwise unenforceable portion).

     7. Time of Essence. Time is of the essence of each and every term,
condition, obligation and provision hereof.

     8. Attorneys' Fees. If any legal action or any arbitration upon mutual
agreement is brought for the enforcement of this Agreement or because of an
alleged dispute, breach or default in connection with this Agreement, the
prevailing party shall be entitled to recover reasonable attorney's fees and
other costs and expenses incurred in that action or proceeding, in addition to
any other relief to which it may be entitled.

     9. Headings. The headings in this Agreement are inserted only as a matter
of convenience, and in no way define, limit, extend or interpret the scope of
this Agreement or of any particular provision hereof.

     10. References. A reference to a particular Section of this Agreement shall
be deemed to include references to all subordinate sections, if any.

     11. Counterparts. This Agreement may be signed in multiple counterparts
with the same force and effect as if all original signatures appeared on one
copy; and in the event this Agreement is signed in counterparts, each
counterpart shall be deemed an original and all of the counterparts shall be
deemed to be one agreement.

                                      -3-
<PAGE>

     12. Applicable Law. This Agreement shall be construed in accordance with,
and governed by, the laws of the State of California, except to the extent
preempted by the laws of the United States.

     IN WITNESS WHEREOF, the parties hereto have caused this Revised Agreement
of Merger to be executed by their duly authorized officers this 4th day of
April, 2000.

                                    CALIFORNIA COMMUNITY BANCSHARES, INC.

                                    By: /s/ Ronald W. Bachli
                                        ----------------------------------
                                           Ronald W. Bachli, President

                                    By: /s/ J. Thomas Byrom
                                        ----------------------------------
                                           J. Thomas Byrom, Secretary

                                    PLACER CAPITAL CO.

                                    By: /s/ Richard W. Decker, Jr.
                                        ----------------------------------
                                           Richard W. Decker, Jr.,
                                           Chairman of the Board

                                    By: /s/ J. Thomas Byrom
                                        ----------------------------------
                                         J. Thomas Byrom,  Assistant Secretary

                                      -4-<PAGE>

                                                                   EXHIBIT 10.21

                                STATE OF HAWAII
                         BUSINESS REGISTRATION DIVISION
                  DEPARTMENT OF COMMERCE AND CONSUMER AFFAIRS
                          SECURITIES ENFORCEMENT UNIT

<TABLE>
<S>                                            <C>  <C>
In the Matter of MTE/Triad, Inc.               )    CASE NOS. SEU-98-044 and
TrueVision Laser Centers of                    )    SEU-98-057
Honolulu, Inc., TrueVision                     )
Laser Centers, Inc., and                       )    SETTLEMENT AND CONSENT
John C. Homan                                  )    AGREEMENT
</TABLE>

                        SETTLEMENT AND CONSENT AGREEMENT

    This Settlement and Consent Agreement ("Agreement") is hereby entered into
as of this 14 day of February, 2000, by and among the parties named in the above
caption, as the respondents (collectively "Respondents") and the Commissioner of
Securities of the State of Hawaii ("Commissioner"), by and through the
Securities Enforcement Unit thereof.

    WHEREAS, the Commissioner previously initiated a preliminary inquiry with
respect to an offering and sale of certain promissory notes ("Notes") issued by
MTE/Triad, Inc. ("MTE") to residents of the State of Hawaii; and

    WHEREAS, the Respondents have received informal requests from the
Commissioner, from time to time, for information and documents with respect to
the details of the Notes offering in Hawaii; and

    WHEREAS, the Respondents have provided information and documents to the
Commission, have met personally with the Commissioner and the Securities
Enforcement Unit; and

    WHEREAS, the Respondents and the Commissioner have reached an agreement in
order to fully and finally resolve any and all issues presented by the
Commissioner's preliminary inquiry referenced above, and by this Agreement, now
enter into the following Agreement, as a bindings settlement and consent
agreement between the Respondents and the Commissioner.

    1. That John C. Homan, in his capacities as an officer and director of MTE,
TrueVision Laser Centers of Honolulu, Inc. and TrueVision Laser Centers, Inc.,
has the authority to enter into this Agreement for and on behalf of the
corporate Respondents.

    2. That the Commissioner's preliminary inquiry contained in the
above-referenced SEU case numbers, include allegations by the Commissioner with
respect to MTE's offering of Notes conducted in the State of Hawaii in 1996 and
1997; allegations concerning the activities of TrueVision Laser Centers, Inc.,
TrueVision Laser Center of Honolulu, Inc., and John C. Homan, in violation of
certain provisions of the Hawaii Uniform Securities Act, as amended ("Hawaii
Act").

    3. That the Respondents have jointly and severally denied that the manner in
which MTE offered and sold the Notes in the State of Hawaii, and TrueVision
Laser Centers, Inc., TrueVision Laser Center of Honolulu, Inc., and
John C. Homan conducted their activities, in any manner, violated the Hawaii Act
or any administrative rules promulgated thereunder.

    4. That by consenting to the terms and conditions of this Agreement, and by
performing the conditions of this Agreement as described herein, the Respondents
jointly and severally, neither admit nor deny the alleged claims or violations
of the Hawaii Act that are contained in the Commissioner's inquiry as set forth
in the above-referenced SEU case numbers, or any other inquiry initiated by the
Commissioner prior to or after the date of this Agreement and which related to
MTE's offer and sale of the Notes in Hawaii.

<PAGE>

    5. That by entering into this Agreement, the Commissioner agrees that no
finding, order, or determination has been reached or will be reached, as to any
alleged violations by any of the Respondents of the Hawaii Act or any
administrative rules promulgated thereunder which related to MTE's offer and
sale of the Notes in Hawaii and the activities of TrueVision Laser
Centers, Inc., TrueVision Laser Center of Honolulu, Inc., and John C. Homan
which is the subject of the Commissioner's preliminary inquiry.

    6. That by entering into this Agreement, the Respondents hereby agree to and
do hereby immediately rescind all agreements, contracts, and Notes entered into
as part of the MTE offer and sale of the Notes in Hawaii. As part of MTE's
rescission, MTE shall pay all investors, as identified in Schedule A that is
attached to and made a part of this Agreement, the amounts identified as "Total
Amount Due" and payable to each investor. All payments shall be in the form of
cashier's checks and shall be delivered concurrently with the execution of this
Agreement to the Securities Enforcement Unit, Business Registration Division,
Department of Commerce and Consumer Affairs, State of Hawaii, 250 South King
Street, Suite 400, Honolulu, Hawaii, on or before Wednesday, February 16, 2000.

    7. That MTE hereby agrees to pay to the Commissioner the costs of the
investigation of the MTE Notes offering undertaken by the Commissioner. Such
payment is to be made by MTE contemporaneously with the execution of this
Agreement, by cashier's check payable to the "Department of Commerce and
Consumer Affairs Compliance Resolution Fund" in the amount of THIRTY THOUSAND
DOLLARS ($30,000.00), and is to be made no later than Wednesday, February 16,
2000.

    8. That by execution of this Agreement, the Commissioner does hereby
acknowledge receipt from MTE of the rescission payments and the costs of the
Commissioner's investigation as provided in paragraphs 6 and 7 of this
Agreement.

    9. That by entering into this Agreement, all claims, allegations,
violations, causes of action, administrative actions or sanctions, fines,
penalties, costs and reimbursements of any nature, arising under the Hawaii Act
and which relate to MTE's offer and sale of the Notes in Hawaii and the
activities of TrueVision Laser Centers, Inc., TrueVision Laser Center of
Honolulu, Inc., and John C. Homan which is the subject of the Commissioner's
preliminary inquiry, are hereby forever released and forever barred, by the
Commissioner as against all Respondents named above that are signatories to this
Agreement. This Agreement shall not preclude or prevent in any way the
imposition of other sanctions or actions against the Respondents for violations
of the Hawaii Act that do NOT relate to MTE's offer and sale of the Notes in
Hawaii and the activities of TrueVision Laser Centers, Inc., TrueVision Laser
Center of Honolulu, Inc., and John C. Homan which is the subject of the
Commissioner's preliminary inquiry. Entering into this Agreement shall not
preclude or prevent in any way the imposition of sanctions or actions against
other parties not named in this Agreement for violations of the Hawaii Act.

                                       2
<PAGE>

    IN WITNESS WHEREOF, the Commissioner and each of the Respondents, hereby
enter into this Agreement as of the date first above written.

<TABLE>
<S>                                                <C>
Office of the Commissioner,                        MTE/TRIAD, INC.
Department of Commerce and
Consumer Affairs
State of Hawaii

/s/ MICHAEL S. MORIYAMA                            /s/ JOHN C. HOMAN
-------------------------------------------        -------------------------------------------
Michael S. Moriyama                                By: John C. Homan, President
Securities Enforcement Attorney
Department of Commerce and
Consumer Affairs, State of Hawaii

                                                   TRUEVISION LASER CENTERS OF
                                                   HONOLULU, INC.
                                                   /s/ JOHN C. HOMAN
                                                   -------------------------------------------
                                                   By: John C. Homan, President

                                                   TRUEVISION LASER CENTERS, INC.
                                                   /s/ JOHN C. HOMAN
                                                   -------------------------------------------
                                                   By: John C. Homan, President

                                                   /s/ JOHN C. HOMAN
                                                   -------------------------------------------
                                                   John C. Homan, individually
</TABLE>

                                       3
<PAGE>

                                   SCHEDULE A

                                In The Matter Of
 MTE/Triad, Inc.; TrueVision Laser Centers of Honolulu, Inc.; TrueVision Laser
                        Centers, Inc.; and John C. Homan
                     Case Numbers SEU-98-044 and SEU-98-057

            PRINCIPAL AND INTEREST CALCULATION FOR DEBENTURE HOLDERS

<TABLE>
<CAPTION>
                                                                                      11.5% INTEREST
                                                     DATE OF    AMOUNT OF    ---------------------------------
                       INVESTORS                     DEP/INVT   INVESTMENT     1996        1997        1998
     ---------------------------------------------   --------   ----------   ---------   ---------   ---------
<S>  <C>                                             <C>        <C>          <C>         <C>         <C>
1.   Dr. George Plechaty..........................   11/27/96   $ 5,000.00   $   53.42   $  575.00   $  575.00
2.   Dr.Candace Furubayashi.......................   12/12/96   $ 5,000.00   $   29.85   $  575.00   $  575.00
3.   Dr. Peggy Liao...............................   12/12/96   $ 5,000.00   $   29.85   $  575.00   $  575.00
4.   Honolulu Medical Group, Inc..................    9/27/96   $ 5,000.00   $  149.25   $  575.00   $  575.00
5.   Honolulu Medical Group, Inc..................   12/12/96   $ 5,000.00   $   29.85   $  575.00   $  575.00
6.   Thomas H. Maeda, Jr..........................    9/27/96   $ 5,000.00   $  149.25   $  575.00   $  575.00
7.   Jon Portis MD Inc............................    9/27/96   $ 5,000.00   $  149.25   $  575.00   $  575.00
     Shigemi Sugiki MD
8.   Dr. Calvin M. Mura...........................    9/27/96   $ 5,000.00   $  149.25   $  575.00   $  575.00
9.   Dr. Workister Lee............................   11/27/96   $ 5,000.00   $   53.42   $  575.00   $  575.00
10.  Dr. Stephen Clason...........................   10/31/96   $ 5,000.00   $  127.25   $  575.00   $  575.00
11.  Maui Medical Group...........................   10/11/96   $ 5,000.00   $  127.25   $  575.00   $  575.00
     (Dr. Clifford Rhodes)
12.  Dr. Malcolm Ing..............................   10/10/96   $ 5,000.00   $  128.83   $  575.00   $  575.00
13.  Dr. Gilbert Yamamoto.........................     3/2/97   $ 5,000.00   $    0.00   $  124.45   $  575.00
14.  Dr. Tyrle Lee Jenkins........................    9/27/96   $ 5,000.00   $  149.25   $  575.00   $  575.00
                                                                ----------   ---------   ---------   ---------
     TOTALS.......................................              $70,000.00   $1,325.97   $7,589.45   $8,050.00
                                                                ==========   =========   =========   =========

<CAPTION>
        11.5% INTEREST
     --------------------     TOTAL
       1999       2000*     AMOUNT DUE
     ---------   --------   ----------
<S>  <C>         <C>        <C>
1.   $  575.00   $ 70.70    $ 6,849.12
2.   $  575.00   $ 70.70    $ 6,825.55
3.   $  575.00   $ 70.70    $ 6,825.55
4.   $  575.00   $ 70.70    $ 6,944.95
5.   $  575.00   $ 70.70    $ 6,825.55
6.   $  575.00   $ 70.70    $ 6,944.95
7.   $  575.00   $ 70.70    $ 6,944.95

8.   $  575.00   $ 70.70    $ 6,944.95
9.   $  575.00   $ 70.70    $ 6,849.12
10.  $  575.00   $ 70.70    $ 6,922.95
11.  $  575.00   $ 70.70    $ 6,922.95

12.  $  575.00   $ 70.70    $ 6,924.53
13.  $  575.00   $ 70.70    $ 6,345.15
14.  $  575.00   $ 70.70    $ 6,944.95
     ---------   -------    ----------
     $8,050.00   $989.80    $96,015.22
     =========   =======    ==========
</TABLE>

    * Calculated to February 14, 2000

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