HUMBOLDT BANCORP
S-4, EX-10, 2000-11-14
SAVINGS INSTITUTION, FEDERALLY CHARTERED
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                     HUMBOLDT BANCORP STOCK OPTION AGREEMENT


This Humboldt  Bancorp Stock Option  Agreement  (the  "Agreement"),  dated as of
September  20,  2000,  between  Humboldt  Bancorp,   a  California   corporation
("Humboldt"),  and Tehama Bancorp, a California  corporation  ("Tehama") is made
with reference to the following:

                                    RECITALS

A.   Humboldt  and  Tehama  have   entered   into  an  Agreement   and  Plan  of
     Reorganization  and Merger dated  September  20, 2000 (the  "Reorganization
     Agreement"), whereby Tehama would be merged with Humboldt (the "Merger").

B.   As partial  consideration  to Tehama for entering  into the  Reorganization
     Agreement,  Humboldt has agreed to issue to Tehama an option  entitling the
     holder  thereof  to  purchase  up to 19.9%  (or  1,470,000  shares)  of the
     outstanding  common  stock  of  Humboldt  ("Common  Stock"),  assuming  the
     exercise of this Option, subject to such restrictions and conditions as may
     be imposed by bank regulatory  authorities having  jurisdiction over Tehama
     and Humboldt, respectively.

C.   Terms  used  herein  and not  otherwise  defined  shall  have the  meanings
     ascribed to them in the Reorganization Agreement or Article VI hereof.

In  consideration  of these premises and of the  representations,  covenants and
agreements hereinafter set forth, Humboldt and Tehama hereby agree as follows:


                                    ARTICLE I
                           ISSUANCE AND SALE OF OPTION

Section  1.1.  Issuance  And  Sale  of The  Option.  Subject  to the  terms  and
conditions  of this  Agreement,  and in reliance  upon the  representations  and
warranties  hereinafter set forth,  and in  consideration  for the execution and
delivery of the Reorganization  Agreement,  Humboldt hereby issues to Tehama one
or more  irrevocable  options (such  options,  together with any options  issued
pursuant to Section 1.4, the "Options") entitling the holder thereof to purchase
in the  aggregate up to 1,470,000  duly  authorized  and newly issued  shares of
Common Stock,  subject to adjustment as provided below. The Options being issued
at the time of the  execution  of this  Agreement  will be evidenced by a single
certificate  in the form of Exhibit A hereto.  All  Options  issued  pursuant to
Section 1.4 will be evidenced by one or, at Tehama's request,  more certificates
in the form of Exhibit A hereto,  dated the date of their issuance,  exercisable
at the  adjusted  exercise  price at the time in effect for the  Options  issued
pursuant  to this  Section  1.1,  provided  that at no time  shall the number of
shares  for which the  Options  are  exercisable  (without  effect to any shares
subject to or issued  pursuant  to the  options)  exceed  19.9% of the number of
shares of Common Stock then issued and outstanding.

Section 1.2. Option Price.  The initial exercise price at which shares of Common
Stock may be acquired  pursuant  to exercise of the Options  shall be $11.75 per
share (the "Option Price"), subject to adjustment as provided in Section 1.4.

<PAGE>2


Section 1.3.  Exercise of Options.

     (a) Subject to their prior termination pursuant to Section 7.1, the Options
may be exercised in whole or in part only after the occurrence of an Acquisition
Event as that term is defined in the Reorganization Agreement.

     (b) In the event  Tehama is entitled to and wishes to exercise the Options,
it shall  send to  Humboldt a written  notice  (the date of which  being  herein
referred to as the "Notice  Date")  specifying (i) the total number of shares it
will  purchase  pursuant to such  exercise and (ii) a place and date not earlier
than three  Business  Days nor later than 60 Business  Days from the Notice Date
for the closing of such purchase (the  "Closing  Date");  provided that if prior
notification to or approval of the Federal Reserve Board or any other regulatory
agency is required in connection with such purchase,  Tehama shall promptly file
the required notice or application for approval,  shall promptly notify Humboldt
of such filing, and shall expeditiously  process the same and the period of time
that  otherwise  would run pursuant to this sentence  shall run instead from the
date on which any required  notification periods have expired or been terminated
or such approvals have been obtained and any requisite waiting period or periods
shall have passed.

     (c) At the  closing  referred to in  subsection  (b),  Tehama  shall pay to
Humboldt the aggregate  purchase price for the shares of Common Stock  purchased
pursuant to the exercise of the Options in immediately  available  funds by wire
transfer to a bank  account  designated  by Humboldt,  provided  that failure or
refusal of Humboldt to designate  such a bank account shall not preclude  Tehama
from exercising the Options.

     (d) At such  closing,  simultaneously  with  the  delivery  of  immediately
available funds as provided in subsection (c),  Humboldt shall deliver to Tehama
a certificate or certificates  representing the number of shares of Common Stock
purchased by Tehama.

     (e) Upon the giving by Tehama to Humboldt of the written notice of exercise
of the  Options  provided  for  under  subsection  (b)  and  the  tender  of the
applicable purchase price in immediately available funds, Tehama shall be deemed
to be the  holder of record of the  shares of Common  Stock  issuable  upon such
exercise,  notwithstanding  that the stock transfer books of Humboldt shall then
be closed or that  certificates  representing  such shares of Common Stock shall
not then be actually delivered to Tehama.  Humboldt shall pay all expenses,  and
any and all federal,  state and local taxes or other charges that may be payable
in connection  with the  preparation,  issue and delivery of stock  certificates
hereunder in the name of Tehama.

Section  1.4.  Additional  Options;  Adjustments  to Option  Price And Number of
Shares.  The  number of shares to which the  Options  may be  exercised  and the
Option Price shall be subject to adjustment as provided below:

     (a) Additional  Options.  If Humboldt shall, on one or more occasions after
the date hereof, issue additional shares of Common Stock, and if, as a result of
any such  issuance  the  shares of Common  Stock  issued  or  issuable  upon the
exercise of Options issued  pursuant to Section 1.1 hereof shall  represent less
than 19.9% of the outstanding Common Stock, assuming the exercise of all Options
and all  other  options  or other  securities  convertible  into  Common  Stock,
Humboldt shall issue to Tehama,  promptly upon Tehama's demand,  without further
consideration, Options to purchase a number of authorized but unissued shares of
Common  Stock  which,  when  added to the  shares  issued or  issuable  upon the

<PAGE>3

exercise of such previously  issued  Options,  would represent 19.9% as the case
may be of the outstanding Common Stock.

     (b) Adjustment For Stock Splits And  Combinations.  If Humboldt at any time
or from time to time after the date of this  Agreement  effects a subdivision of
Common  Stock,  the  Option  Price  then  in  effect   immediately  before  that
subdivision shall be proportionately  decreased, and conversely,  if Humboldt at
any time or from time to time  after  the date of this  Agreement  combines  the
outstanding  shares of Common Stock, the Option Price then in effect immediately
before the combination shall be proportionately  increased. Any adjustment under
this subsection (b) shall become  effective at the close of business on the date
the subdivision or combination becomes effective.

     (c)  Adjustment  For  Certain  Dividends  And  Distributions.  In the event
Humboldt  at any time or from  time to time  after  the  date of this  Agreement
makes, or fixes a record date for the  determination  of holders of Common Stock
entitled to  receive,  a dividend or other  distribution  payable in  additional
shares of Common  Stock,  then and in each such event the  Option  Price then in
effect shall be decreased as of the time of such  issuance or, in the event such
a record date is fixed,  as of the close of business  on such  record  date,  by
multiplying  the Option Price then in effect by a fraction (i) the  numerator of
which is the total  number of shares of  Common  Stock  issued  and  outstanding
immediately  prior to the time of such issuance or the close of business on such
record  date,  and (ii) the  denominator  of which shall be the total  number of
shares of Common Stock issued and outstanding  immediately  prior to the time of
such  issuance  or the close of  business on such record date plus the number of
shares of Common  Stock  issuable in payment of such  dividend or  distribution;
provided,  however,  that if such record date is fixed and such  dividend is not
fully paid or if such distribution is not fully made on the date fixed therefor,
the Option Price shall be recomputed  accordingly as of the close of business on
such record date and thereafter  the Option Price shall be adjusted  pursuant to
this  subsection  (c) as of the time of  actual  payment  of such  dividends  or
distributions.

     (d)  Adjustments  For  Other  Dividends  And  Distributions.  In the  event
Humboldt  at any time or from  time to time  after  the  date of this  Agreement
makes, or fixes a record date for the  determination  of holders of Common Stock
entitled to receive, a dividend or other  distribution  payable in securities of
Humboldt  other than shares of Common Stock,  then in each such event  provision
shall be made so that  the  holders  of  Options  shall  receive  upon  exercise
thereof,  in  addition  to the  number  of shares  of  Common  Stock  receivable
thereupon,  the amount of securities of Humboldt  which they would have received
had their Options been converted into Common Stock on the date of such event and
had they  thereafter,  during  the  period  from  the date of such  event to and
including  the  date  of  exercise  of the  Options,  retained  such  securities
receivable  by them as  aforesaid  during  such  period,  subject  to all  other
adjustments called for during such period under this Section 1.4.

     (e) Adjustment For Reclassification,  Exchange And Substitution.  If Common
Stock  issuable  upon the  exercise of the Options is changed into the same or a
different  number  of  shares  of any class or  classes  of  stock,  whether  by
recapitalization,  reclassification  or otherwise  (other than a subdivision  or
combination   of  shares  or  stock  dividend  or  a   reorganization,   merger,
consolidation  or sale of assets  provided for  elsewhere in this Section  1.4),
then  and in any such  event  each  holder  of  Options  shall  have  the  right
thereafter  to receive upon exercise of the Options the kind and amount of stock
and  other  securities  and  property   receivable  upon  such   reorganization,
reclassification  or other  change by  holders of the number of shares of Common
Stock into which such Options  might have been  exercised  immediately  prior to
such  reorganization,   reclassification  or  change,  all  subject  to  further
adjustment as provided in this Section 1.4.

<PAGE>4

     (f) Reorganization,  Mergers, Consolidations And Sales of Assets. If at any
time or from time to time  there is a capital  reorganization  of the  shares of
Common  Stock  (other  than  a   recapitalization,   subdivision,   combination,
reclassification  or exchange of shares  provided for  elsewhere in this Section
1.4), or a merger or consolidation of Humboldt with or into another corporation,
or the sale of all or substantially  all of Humboldt's  properties and assets to
any other person, then, as a part of such reorganization,  merger, consolidation
or sale,  provision  shall  be made so that the  holders  of the  Options  shall
thereafter  be  entitled to receive  upon  exercise of the Options the number of
shares of stock or other securities or property of Humboldt, or of the successor
corporation  resulting  from such merger or  consolidation  or sale,  to which a
holder of Common Stock  deliverable upon exercise of the Options would have been
entitled in such capital reorganization,  merger,  consolidation or sale. In any
such  case,  appropriate  adjustment  shall  be made in the  application  of the
provisions of this Section 1.4 and the other terms and  conditions  with respect
to the rights of the holders of the Options  after the  reorganization,  merger,
consolidation  or  sale to the  end  that  the  provisions  of  this  Agreement,
including  this Section 1.4  (including  adjustment  of the Option Price then in
effect and number of shares  purchasable  upon exercise of the Options) shall be
applicable after that event and be as nearly equivalent to the provisions hereof
as may be practicable.

     (g) Sale of Shares Below Option Price.

          (i) If at any  time  or  from  time to  time  after  the  date of this
     Agreement, Humboldt issues or sells, or is deemed by the express provisions
     of this subsection (g) to have issued or sold,  Additional Shares of Common
     Stock  (as  hereinafter  defined),  other  than  as  a  dividend  or  other
     distribution  on any class of stock as provided in subsection (c) above and
     other than upon a subdivision  or  combination of shares of Common Stock as
     provided in subsection (b) above,  for an Effective  Price (as  hereinafter
     defined) less than the Option Price (or, if an adjusted  Option Price shall
     be in  effect  by  reason  of a  previous  adjustment,  then less than such
     adjusted  Option Price) then and in each such case the then existing Option
     Price shall be  reduced,  as of the opening of business on the date of such
     issuance or sale, to a price determined by multiplying that Option Price by
     a fraction (i) the  numerator of which shall be (A) the number of shares of
     Common  Stock Deemed  Outstanding  at the close of business on the day next
     preceding  the date of such  issue or sale plus (B) the number of shares of
     Common  Stock which the  aggregate  consideration  received  (or by express
     provision  hereof  deemed to have been  received) by Humboldt for the total
     number of  Additional  Shares of Common Stock so issued  would  purchase at
     such Option Price, and (ii) the denominator of which shall be the number of
     shares of Common Stock Deemed  Outstanding  at the close of business on the
     date of such  issuance  after giving  effect to such issuance of Additional
     Shares of Common Stock.  For purposes of this paragraph (i),  "Common Stock
     Deemed  Outstanding" at any given time shall mean the sum of (1) the number
     of shares of Common Stock actually outstanding at that time, (2) the number
     of Additional  Shares of Common Stock then deemed to have been issued under
     paragraphs  (iii)  or (iv) of this  subsection  (g) and (3) the  number  of
     shares of Common Stock then  issuable upon exercise of stock options to the
     extent not already  deemed to have been issued  under  paragraphs  (iii) or
     (iv) of this subsection (g).

          (ii) For the  purpose of making  any  adjustment  required  under this
     subsection (g), the consideration  received by Humboldt for any issuance or
     sale of securities  shall (i) to the extent it consists of cash be computed
     at the net amount of cash  received  by  Humboldt  after  deduction  of any
     expenses payable by Humboldt and any  underwriting or similar  commissions,
     compensation or concessions  paid or allowed by Humboldt in connection with
     such issue or sale,  (ii) to the extent it consists of property  other than
     cash,  be computed at the fair value of that property as determined in good

<PAGE>5

     faith by the Humboldt Board and (iii) if Additional Shares of Common Stock,
     Convertible  Securities  (as  hereinafter  defined) or rights or options to
     purchase either Additional Shares of Common Stock or Convertible Securities
     are issued or sold  together with other stock or securities or other assets
     of Humboldt  for a  consideration  which  covers  both,  be computed as the
     portion of the consideration so received that may be reasonably  determined
     in good faith by the  Humboldt  Board to be  allocable  to such  Additional
     Shares of Common Stock, Convertible Securities or rights or options.

          (iii) For the purpose of any adjustment required under this subsection
     (g),  if at any time or from time to time after the date of this  Agreement
     Humboldt  issues or sells any rights or  options  for the  purchase  of, or
     stock or other securities  convertible  into,  Additional  Shares of Common
     Stock (such convertible  stock or securities being hereinafter  referred to
     as "Convertible Securities"), then in each case Humboldt shall be deemed to
     have  issued  at the time of the  issuance  of such  rights or  options  or
     Convertible  Securities the maximum  number of Additional  Shares of Common
     Stock issuable upon exercise or conversion  thereof and to have received as
     consideration  for the issuance of such shares an amount equal to the total
     amount of the consideration,  if any, received by Humboldt for the issuance
     of such rights or options or  Convertible  Securities  plus, in the case of
     such options or rights,  the amounts of  consideration,  if any, payable to
     Humboldt  upon the  exercise of such  options or rights and, in the case of
     Convertible  Securities,  the amounts of consideration,  if any, payable to
     Humboldt upon  conversion  (other than by  cancellation  of  liabilities or
     obligations   evidenced  by  such  Convertible   Securities).   No  further
     adjustment of the Option Price,  adjusted upon the issuance of such rights,
     options or Convertible Securities,  shall be made as a result of the actual
     issuance of  Additional  Shares of Common Stock on the exercise of any such
     rights or options or the conversion of any such Convertible Securities.  If
     any such rights or options or the conversion  privilege  represented by any
     such Convertible Securities shall expire or be canceled without having been
     exercised,  the Option Price  adjusted  upon the issuance of such  options,
     rights or  Convertible  Securities  shall be readjusted to the Option Price
     which  would have been in effect had an  adjustment  been made on the basis
     that the  only  Additional  Shares  of  Common  Stock  so  issued  were the
     Additional  Shares of Common Stock, if any,  actually issued or sold on the
     exercise  of such  rights  or  options  or  rights  of  conversion  of such
     Convertible Securities, and such Additional Shares of Common Stock, if any,
     were  issued or sold for the  consideration  actually  received by Humboldt
     upon such exercise,  plus the  consideration,  if any, actually received by
     Humboldt  for the  granting of all such  rights or options,  whether or not
     exercised,  plus the  consideration  received  for  issuing or selling  the
     Convertible  Securities actually converted plus the consideration,  if any,
     actually received by Humboldt (other than by cancellation of liabilities or
     obligations evidenced by such Convertible  Securities) on the conversion of
     such Convertible Securities.

          (iv) For the purpose of any adjustment  required under this subsection
     (g),  if at any time or from time to time after the date of this  Agreement
     Humboldt  issues  or sells  any  rights  or  options  for the  purchase  of
     Convertible Securities,  then in each such case Humboldt shall be deemed to
     have  issued at the time of the  issuance  of such  rights or  options  the
     maximum  number  of  Additional   Shares  of  Common  Stock  issuable  upon
     conversion of the total amount of  Convertible  Securities  covered by such
     rights or options and to have received as consideration for the issuance of
     such  Additional  Shares of Common  Stock an amount  equal to the amount of
     consideration, if any, received by Humboldt for the issuance of such rights
     or options,  plus the minimum amounts of consideration,  if any, payable to
     Humboldt  upon the  exercise of such rights or options and plus the minimum
     amount  of  consideration,  if any,  payable  to  Humboldt  (other  than by
     cancellation  of liabilities or obligations  evidenced by such  Convertible
     Securities) upon the conversion of such Convertible Securities.  No further
     adjustment of the Option  Price,  adjusted upon the issuance of such rights
     or  options, shall  be made  as a  result of  the actual  issuance  of  the

<PAGE>6

     Convertible  Securities upon the exercise of such rights or options or upon
     the  actual  issuance  of  Additional  Shares  of  Common  Stock  upon  the
     conversion  of such  Convertible  Securities.  The  provisions of paragraph
     (iii) above for the readjustment of the Option Price upon the expiration of
     rights or options or the rights of  conversion  of  Convertible  Securities
     shall  apply  in  like  manner  to  the  rights,  options  and  Convertible
     Securities referred to in this paragraph (iv).

          (v)  "Additional  Shares of Common  Stock"  shall  mean all  shares of
     Common Stock issued by Humboldt after the date of this Agreement whether or
     not subsequently  reacquired or retired by Humboldt,  other than (i) shares
     of Common Stock issued upon  exercise of the Options and (ii) shares issued
     by way of dividend or other distribution on shares of Common Stock excluded
     from the  definition of Additional  Shares of Common Stock by the foregoing
     clause (i) or shares of Common  Stock  resulting  from any  subdivision  or
     combination of shares of Common Stock so excluded,  or shares issued by way
     of dividend or other  distribution on, or resulting from any subdivision or
     combination  of,  shares of Common stock  excluded  from the  definition of
     "Additional  Shares  of Common  Stock" by the  foregoing  clause  (i).  The
     "Effective  Price" of  Additional  Shares of Common  Stock  shall  mean the
     quotient  determined by dividing the total number of  Additional  Shares of
     Common  Stock  issued or sold,  or  deemed  to have been  issued or sold by
     Humboldt  under  this  subsection  (g),  into the  aggregate  consideration
     received or deemed to have been  received by Humboldt  for such issue under
     this subsection (g).


                                   ARTICLE II
                  REPURCHASE OF OPTIONS AND LIMITATIONS ON SALE

Section 2.1.  Repurchase of Options.

     (a) Prior to the occurrence of an Acquisition Event, Humboldt shall have no
right to  repurchase  the  Options  and  Tehama  shall  have no right to require
Humboldt to repurchase the Options.

     (b) At any time after the  occurrence  of an  Acquisition  Event,  Humboldt
shall have the right to purchase (or to cause a person designated by Humboldt to
purchase),  and Tehama shall have the right to require that Humboldt  repurchase
(or,  if  Humboldt  shall so elect,  cause a person  designated  by  Humboldt to
purchase), (i) all (but not fewer than all) the Options at the time beneficially
owned by Tehama and its  Affiliates  at the Option Call Price in effect for such
Options on the date of closing (as  provided  below) and (ii) all (but not fewer
than all) of the shares of Common Stock  purchased by Tehama and its  Affiliates
pursuant to this Agreement with respect to which Tehama has beneficial ownership
at a price equal to the aggregate Market Value for such shares as of the date of
closing (as provided below).  Any purchase pursuant hereto shall take place on a
Business  Day  specified in a notice given by Humboldt to Tehama or by Tehama to
Humboldt,  as the case may be (but in no event  prior to the 30th day  following
the date of any such notice to Tehama or later than the 30th day  following  the
date of any such notice to Humboldt).

     (c) The closing of any repurchase of Options and/or shares pursuant to this
Section 2.1 shall take place at 10:00 a.m.  Pacific  Time, on the date set forth
in the applicable notice given by Humboldt or Tehama, as the case may be, at the
office of Tehama at the address set forth in Section 8.1. The amount  payable to
Tehama and its Affiliates  upon any repurchase of Options and/or shares shall be
paid in lawful  money of the United  States by a federal  funds  check or a wire
transfer of immediately available funds to an account designated by Tehama. Upon
receipt  of such  payment, Tehama  shall deliver  or cause  to be  delivered  to

<PAGE>7

Humboldt  the  certificates  representing  all the Options  and/or  shares being
repurchased  free  and  clear  of any  liens,  security  interests,  charges  or
encumbrances.

Section 2.2.  Certain  Determinations  of Market Value.  The  calculation of the
Market Value,  as required  herein,  shall be calculated in accordance with this
Section 2.2. In the event that Market Value is to be determined  pursuant to the
terms hereof and there is not an established trading market for shares of Common
Stock,  or more than 50% of the  outstanding  shares  of  Common  Stock are held
beneficially  or of  record  by  persons,  each of whom  owns  (individually  or
together with members of any group of which such persons are members) 5% or more
of the  outstanding  shares of Common  Stock,  then  Tehama may elect to have an
investment  banking firm mutually agreeable to Humboldt and Tehama determine (i)
whether,  in the opinion of such  investment  banking  firm,  as a result of the
absence of an established trading market or the concentration of stock holdings,
Market Value  (determined in accordance with the provisions of the definition of
Market Value in Article VI) does not accurately reflect the fair market value of
a block of 1,000  shares of Common Stock on the date as of which Market Value is
to be  determined,  and (ii) if such  investment  banking firm  determines  that
Market Value (as so  determined)  does not  accurately  reflect such fair market
value, such investment  banking firm shall make determination of the fair market
value of a share of Common  Stock on the date as of which  Market Value is to be
determined, based on whatever factors it deems relevant, as soon as possible and
shall promptly give written notice to Tehama and Humboldt of its  determination.
The fees of such investment  banking firm in connection with such  determination
shall be paid by Tehama.  Such  determination  shall be final and binding on the
parties hereto and the fair market value so determined shall, if higher than the
Market  Value  that would  otherwise  apply,  be the Market  Value of a share of
Common Stock. In the event such  determination  is not transmitted to Tehama and
Humboldt  prior to the scheduled  closing date with respect to any repurchase of
Options or Common Stock, the scheduled  closing of such transaction shall not be
postponed,  and  Humboldt  shall make such  payments on the closing  date as are
required  based on the Market Value of a share of Common Stock  determined as if
Tehama had not made an election  under this Section 2.2.  Within three  Business
Days after such investment banking firm's  determination is made and conveyed to
Tehama and  Humboldt in  writing,  Humboldt  shall make a payment to Tehama,  or
Tehama  shall  make a  payment  to  Humboldt,  as the case may be,  equal to the
difference between the amount paid on the closing date and the amount that would
have  been so  payable  had such  amount  been  determined  on the basis of such
investment banking firm's determination of the Market Value of a share of Common
Stock.


                                   ARTICLE III
                    RESTRICTIONS ON TRANSFERABILITY OF STOCK;
                     COMPLIANCE WITH SECURITIES ACT OF 1933

Section 3.1. Restrictions on Transferability.  The Options acquired by Tehama or
any  Affiliate  of Tehama  pursuant to this  Agreement  and the shares of Common
Stock  issuable  upon  exercise of such Options and any shares of capital  stock
received or issued in respect thereof, including, without limitation, securities
issued  upon  any  stock  split,  stock  dividend,   recapitalization,   merger,
consolidation or similar event (such Options and all such shares of Common Stock
and securities being  collectively  called the "Restricted  Stock") shall not be
hypothecated,  nor shall any claim or liability  exist, nor shall any agreement,
written or oral,  be entered  into by Tehama or any  Affiliate  of Tehama  which
would  cause any claim or  liability  to exist with  respect  to the  Restricted
Stock,  and the  Restricted  Stock  shall  not be  transferred  except  upon the
conditions, to the extent applicable, specified in this Article III. Tehama will
cause any proposed  transferee of  Restricted  Stock held by Tehama or any other

<PAGE>8

Affiliate of Tehama to agree to take ownership of such Restricted  Stock subject
to the  provisions,  to the extent  applicable,  of this Article III;  provided,
however,  that  the  provisions  of this  Article  shall  cease  to apply to any
Restricted  Stock which shall have been sold in a registered  public offering in
accordance with the provisions of this Article III. Tehama represents that it is
purchasing  the  Restricted  Stock for its own account and not with a view to or
for sale in connection with any distribution of such Restricted Stock.

Section 3.2.  Restrictive Legend; Notice of Proposed Transfers.

     (a) Each certificate  representing Restricted Stock shall (unless otherwise
permitted  by the  provisions  of paragraph  (b) of this  Section) be stamped or
otherwise imprinted with a legend in substantially the following form:

     THESE  SHARES/OPTIONS  HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
     1933,  AS  AMENDED.  THESE  SHARES/OPTIONS  MAY NOT BE SOLD OR  TRANSFERRED
     EXCEPT  PURSUANT  TO (i) A  REGISTRATION  STATEMENT  WITH  RESPECT  TO SUCH
     SECURITIES  WHICH IS EFFECTIVE UNDER SAID ACT OR (ii) AN OPINION OF COUNSEL
     THAT AN EXEMPTION FROM REGISTRATION  UNDER THE SECURITIES ACT IS AVAILABLE.
     THE  TRANSFERABILITY  OF THESE  SHARES/  OPTIONS IS FURTHER  SUBJECT TO THE
     PROVISIONS  OF A STOCK OPTION  AGREEMENT  DATED AS OF SEPTEMBER 20, 2000, A
     COPY OF WHICH IS AVAILABLE FOR INSPECTION AT THE OFFICE OF THE SECRETARY OF
     HUMBOLDT BANCORP.

     (b)  Each  holder  of  a  certificate   representing  Restricted  Stock  by
acceptance  thereof agrees to comply in all respects with the provisions of this
Section  3.2(b).  Prior to any proposed  transfer of any Restricted  Stock other
than pursuant to a  registration  under the  Securities  Act, the holder thereof
shall give written notice to Humboldt of such holder's  intention to effect such
transfer.  Each such notice shall describe the manner and  circumstances  of the
proposed  transfer  of the  Restricted  Stock  to be  transferred  and  shall be
accompanied by an unqualified written opinion of counsel reasonably satisfactory
to Humboldt to the effect that such  proposed  transfer may be effected  without
registration  under the  Securities  Act.  Subject to Section 3.11 hereof,  upon
delivery to Humboldt of such notice and such  opinion of counsel,  the holder of
such  Restricted  Stock shall be entitled to transfer such  Restricted  Stock in
accordance  with the terms of such notice  delivered  by the holder to Humboldt.
Each certificate evidencing Restricted Stock transferred as above provided shall
bear the appropriate restrictive legend set forth in paragraph (a) above, except
that such certificate  shall not bear such restrictive  legend if the opinion of
counsel referred to above shall be to the further effect that such legend is not
required in order to establish  compliance with any provisions of the Securities
Act.

Section 3.3. No Transfers Prior to Acquisition Event.  Notwithstanding  anything
to the contrary set forth in this  Agreement or the  Restricted  Stock,  neither
Tehama nor any Affiliate of Tehama shall sell,  transfer or otherwise dispose of
all or any portion of the Options  owned by it,  other than to an  Affiliate  of
Tehama, except after the occurrence of an Acquisition Event; provided,  however,
that following an Acquisition  Event, if Humboldt or Tehama shall give notice of
its election to exercise its rights under Section 2.1, then such right of Tehama
and its  Affiliates  to sell,  transfer or otherwise  dispose of the  Restricted
Stock shall no longer be exercised  unless  Humboldt shall have defaulted in its
obligation  to repurchase  such  Restricted  Stock on the date  specified in any
notice.

<PAGE>9

Section 3.4.  Limitations on Transferees And Manner of Transfer.

     (a) In the event that Tehama and its Affiliates become entitled pursuant to
the  provisions  of  Section  3.3 to sell,  transfer  or  otherwise  dispose  of
Restricted Stock,  such Restricted Stock may be sold or transferred  (subject to
Section  3.11  hereof)  only  (i) to a third  party  (or a third  party  and its
Affiliates) in a transaction which complies with the provisions of paragraph (b)
of this  Section or (ii) to one or more  underwriters  or dealers in  connection
with a broad public distribution  complying with the provisions of paragraph (c)
of this Section of the shares of Common Stock issuable  pursuant to the exercise
of the  transferred  Options (such shares being  hereinafter  referred to as the
"Underlying Shares").  The provisions of this Section shall only apply to sales,
transfers or dispositions  by Tehama and its Affiliates,  and shall not apply to
sales,  transfers or  dispositions  by  transferees  of Tehama or its Affiliates
(except  that  any sale or  disposition  by  dealers  or  underwriters  shall be
conducted  in  accordance  with the  applicable  provisions  of this Section and
further except that all resales shall be made in accordance  with the Securities
Act).

     (b)  Tehama  and its  Affiliates  shall be  entitled,  subject to the other
applicable  provisions of this Article III (including  Section 3.11) and Section
2.1, to sell or transfer  Restricted  Stock in one or more  transactions  exempt
from the  registration  requirements  of Section 5 of the  Securities  Act.  For
purposes of the  immediately  preceding  sentence,  it shall be assumed that all
Options,  if any, that already have been sold or  transferred  by Tehama and its
Affiliates are still outstanding and have not been exercised in whole or in part
to purchase shares of Common Stock.

     (c) Options owned by Tehama and its Affiliates,  unless sold to Humboldt or
an Affiliate of Humboldt or in  compliance  with  paragraph (b) of this Section,
may  only be sold or  transferred  to one or more  underwriters  or  dealers  in
accordance with the provisions of this paragraph. Tehama and its Affiliates may,
subject to the terms and  conditions  set forth in this  paragraph  (c), sell or
transfer Options in whole or in part to one or more  underwriters or dealers who
agree in writing with Tehama,  prior to the  effective  time of any such sale or
transfer,  to exercise  such  Options and offer and sell the  Underlying  Shares
either (i) to the public in a public  offering  registered  under the Securities
Act (or any successor  federal  securities laws) pursuant to a distribution,  or
(ii) in other  transactions  complying  with the  requirements  of paragraph (b)
above.  Notwithstanding  any other  provision of this Agreement to the contrary,
the exercise of any Options transferred to underwriters or dealers in accordance
with this Section and the acquisition by such  underwriters or dealers of shares
of Common Stock pursuant to such exercise may be made simultaneously on the date
of the  closing  of the sale or  transfer  by  Tehama or its  Affiliates  of the
relevant  Options to such  underwriters or dealers,  provided  Humboldt is given
written  notice of the date of such  closing at least five  Business  Days prior
thereto.  At any such closing,  against payment of the exercise price for shares
of Common  Stock to be acquired  pursuant to the  exercise of Options,  Humboldt
will deliver or cause to be delivered  certificates  representing the Underlying
Shares to such underwriters or dealers, in such names and denominations as it or
they shall designate not fewer than two Business Days prior to such closing.

Section 3.5. "Demand"  Registration.  From and after such date as Tehama and its
Affiliates  become  entitled  pursuant to Section  3.4 to sell or  transfer  any
Restricted  Stock,  Humboldt shall, if requested by Tehama,  as expeditiously as
possible,  use its best  efforts to effect the  registration  of the  Restricted
Stock (which  Humboldt  has been  requested to register on a form in general use
under the Securities Act (or any successor  federal  securities law) selected by
Humboldt,  in order to permit the sale or other  disposition of such  Restricted
Stock in accordance  with the intended  method of sale or other  disposition set
forth in the request (subject to the provisions of Section 3.4(c)). The right to

<PAGE>10

require  registration of the Restricted Stock under this Section 3.5 may only be
exercised  once unless  Tehama is advised in writing by its  investment  banking
firm (a copy of which advice shall be supplied to Humboldt) that, in the opinion
of such firm, an additional or two additional  registrations  are appropriate to
maximize  the  benefits to Tehama of the  proposed  distribution  of  Restricted
Stock, in which event Tehama may exercise once or twice more, as applicable, its
rights under this Section 3.5. Upon the issuance of a stop order or  injunction,
Humboldt may withdraw any such  registration  statement and abandon the proposed
offering which Tehama shall have demanded, in which case Tehama's right shall be
reinstated.

Section 3.6.  "Piggyback"  Registration.  From and after such date as Tehama and
its Affiliates  become entitled  pursuant to Section 3.4 to sell or transfer any
Restricted  Stock,  if at any time  Humboldt  proposes  to  register  any of its
securities under the Securities Act (or any successor  federal  securities law),
whether or not for sale for its own account (except with respect to registration
statements  filed with  respect to the  issuance of  securities  under  employee
benefit plans), it will give written notice to Tehama of its intention to do so.
Upon the written request of Tehama,  given within 15 calendar days after receipt
of Humboldt's notice, Humboldt will use its best efforts to cause to be included
in the shares to be covered by the registration  statement  proposed to be filed
by Humboldt,  in accordance with the request of Tehama,  the Restricted Stock to
be sold by dealers or  underwriters in accordance with the provisions of Section
3.4; provided,  however, that Humboldt need not include such Restricted Stock in
such registration  statement if Humboldt is advised in writing by its investment
banking  firm (a copy of which  advise  shall be  supplied  to Tehama)  that the
inclusion  of such  securities  shall,  in the opinion of such firm,  materially
interfere  with the orderly sale and  distribution  of the  Humboldt  securities
being sold by it.  Humboldt may, in its sole  discretion and without the consent
of Tehama,  withdraw any such  registration  statement  and abandon the proposed
offering in which Tehama shall have  requested to  participate  pursuant to this
Section.

Section 3.7.  Registration Procedures And Expenses.

     (a) If and whenever  Humboldt is required by the provisions of this Article
III to use its best efforts to effect the  registration of any of the Restricted
Stock under the Securities Act (or any successor federal securities law), Tehama
and its Affiliates  (including the underwriters in the case of a registration of
Underlying Shares)  (individually  referred to as a "selling holder" or "holder"
and collectively  referred to as "selling holders" or "holders") will furnish in
writing such information as is reasonably requested by Humboldt for inclusion in
the registration  statement relating to such offering and such other information
and  documentation as Humboldt shall reasonably  request,  and Humboldt will, as
expeditiously as possible:

          (i) prepare and file with the SEC or any other  federal  agency at the
     time  administering the Securities Act (or a successor  federal  securities
     law) a registration  statement with respect to such  securities and use its
     best  efforts to cause  such  registration  statement  to become and remain
     effective  for such  period as may be  necessary  to permit the  successful
     marketing of such securities, but not exceeding 90 days;

          (ii) prepare and file with the SEC such  amendments and supplements to
     such registration statement and the prospectus used in connection therewith
     as may be necessary to keep such  registration  statement  effective and to
     comply with the provisions of the Securities Act;

          (iii)  furnish  to each  selling  holder  of  Restricted  Stock  being
     registered such number of copies of a prospectus and preliminary prospectus
     in conformity with the requirements of the Securities Act (or any successor
     federal  securities  law),  and such  other  documents  as such  seller may

<PAGE>11

     reasonably  request  in  order  to  facilitate  the  public  sale or  other
     disposition of the Restricted Stock being registered owned by such seller;

          (iv)  furnish,  at the request of any holder or holders of  securities
     being  registered  pursuant  to this  Article  III,  on the date  that such
     securities  are  delivered to the  underwriters  for sale  pursuant to such
     registration or if such securities are not being sold through underwriters,
     on the date the  registration  statement  with  respect to such  securities
     becomes  effective  (A) an opinion dated such date of  independent  counsel
     representing  Humboldt for the purposes of such registration,  addressed to
     the underwriters, if any, and to the holder or holders making such request,
     stating that such  registration  statement has become  effective  under the
     Securities  Act (or  such  successor  law)  and that (a) to the best of the
     knowledge  of such  counsel,  no stop order  suspending  the  effectiveness
     thereof  has been  issued and no  proceedings  for that  purpose  have been
     instituted or are pending or contemplated under the Securities Act (or such
     successor  federal  securities  law); (b) the registration  statement,  the
     related  prospectus and each  amendment or supplement  thereto comply as to
     form in all material  respects with the  requirements of the Securities Act
     (or such successor law) and the applicable rules and regulations of the SEC
     thereunder,  except  that  such  counsel  need  express  no  opinion  as to
     financial  information or information provided by selling holders contained
     therein;  (c) such counsel  (subject to such  customary  limitation  on the
     scope of their  investigation as shall be set forth in such opinion) has no
     reason to believe that either the registration statement or the prospectus,
     or any amendment or supplement thereto,  contains any untrue statement of a
     material  fact or omits to state a  material  fact  required  to be  stated
     therein or necessary to make the statements  therein not misleading  except
     that such counsel need  express no opinion as to financial  information  or
     information   provided  by  selling  holders  contained  therein;  (d)  the
     descriptions in the  registration  statement and in the prospectus,  or any
     amendment or supplement thereto, of all legal and governmental  matters and
     all contracts  and other legal  documents or  instruments  are accurate and
     fairly present the information  required to be shown;  and (e) such counsel
     does  not  know  of any  legal  or  governmental  proceedings,  pending  or
     contemplated,  required to be  described in the  registration  statement or
     prospectus,  or any  amendment  or  supplement  thereto,  or to be filed as
     exhibits to the registration statement which are not described and filed as
     required;  and (B) a letter dated such date, from the independent certified
     public accountants of Humboldt, addressed to the underwriters,  if any, and
     to the holder or holders by or on behalf of whom a request is made, stating
     that they are independent  certified public  accountants within the meaning
     of the  Securities  Act (or such  successor law) and that in the opinion of
     such  accountants  the financial  statements  and other  financial  data of
     Humboldt included in the registration  statement or the prospectus,  or any
     amendment or supplement thereto, comply as to form in all material respects
     with the applicable accounting  requirements of the Securities Act (or such
     successor  law).  Such  letter  from  the  independent   certified   public
     accountants   shall   additionally   cover  such  other  financial  matters
     (including  information as to the period ending not more than five business
     days prior to the date of such letter) with respect to the  registration in
     respect of which  such  letter is being  given as the holder of  Restricted
     Stock being registered may reasonably request;

          (v) use its best efforts to register or qualify the  Restricted  Stock
     covered by such registration  statement under such other securities or blue
     sky  laws of  such  jurisdictions  as  each  such  selling  holder  of such
     Restricted Stock shall reasonably request and do any and all other acts and
     things which may be necessary or reasonably desirable to enable such seller
     to consummate the public sale or other disposition in such jurisdictions as
     may be requested by such seller;  provided,  however,  that Humboldt  shall
     have no obligation to qualify to do business in any jurisdiction or to file
     a general consent to service of process in any jurisdiction;

<PAGE>12

          (vi) notify each selling  holder of  Restricted  Stock covered by such
     registration  statement,  at any time when a prospectus relating thereto is
     required to be delivered under the Securities Act (or any successor Federal
     securities  law),  of the  happening  of any event as a result of which the
     prospectus  included  in such  registration  statement,  as then in effect,
     includes  an  untrue  statement  of a  material  fact or omits to state any
     material  fact  required  to be stated  therein  or  necessary  to make the
     statements  therein not misleading in the light of the  circumstances  then
     existing;

          (vii)  otherwise  use its best  efforts to comply with all  applicable
     rules  and  regulations  of the SEC,  and make  available  to its  security
     holders, as soon as reasonably practicable,  an earnings statement covering
     the period of at least twelve  months,  but not more than eighteen  months,
     beginning  with the first full calendar  month after the effective  date of
     such  registration  statement,  which earnings  statement shall satisfy the
     provisions of Section 11(a) of the Securities Act;

          (viii) provide a transfer agent and registrar for all Restricted Stock
     covered by such registration statement not later than the effective date of
     such registration statement;

          (ix) use its best  efforts  to list all Common  Stock  covered by such
     registration statement on each securities exchange, if any, on which any of
     the shares of Common  Stock is then listed  (unless  such  Common  Stock is
     already  so listed) if such  listing is then  permitted  under the rules of
     such exchange or with the NASDAQ, National Market System; and

          (x)  undertake  to take  such  further  actions  as may be  reasonably
     requested by the underwriters.

     (b) If any registration statement pursuant to Section 3.5 or 3.6 shall have
been declared  effective  and, in the judgment of Humboldt,  (A) any event shall
occur or state of facts  exist  (other  than as  described  in clause (B)) which
requires a notice to the selling holders of Restricted  Stock pursuant to clause
(vi) of  paragraph  (a) of this  Section 3.7 or (B) the  offering at the time of
Restricted Stock pursuant to such registration statement would adversely affect,
or would be improper in view of, a public offering,  financing,  reorganization,
recapitalization,   merger,   consolidation,   acquisition,   or  other  similar
transaction,  or  negotiations,  discussions  or pending  proposals with respect
thereto, immediately upon receipt of notice to such effect from Humboldt, Tehama
shall cease to offer or sell any  Restricted  Stock  registered  thereunder  and
cease to deliver or use the  prospectus  in use  thereunder.  In the case of any
matter  described in clause (A),  Humboldt  shall,  as promptly as  practicable,
furnish to each selling holder a reasonable  number of copies of a supplement to
or an amendment of such  prospectus  as may be necessary so that,  as thereafter
delivered to the purchaser of such securities, such prospectus shall not include
an untrue statement of a material fact or omit to state a material fact required
to be stated therein or necessary to make the statements  therein not misleading
in the  light of the  circumstances  then  existing.  In the case of any  matter
described in clause (B), Humboldt shall promptly notify Tehama at such times as,
in  Humboldt's  judgment,  such offering may be  recommenced  (which shall be no
later than 90 days following such suspension);  provided that Tehama may, in its
sole discretion,  discontinue such offering with respect to the Restricted Stock
covered   thereby,   in  which  event  Tehama  shall  be  entitled  to  "demand"
registration  rights  hereunder  to the full extent as if such  offering had not
been requested.

All expenses incurred by Humboldt in complying with Sections 3.5 and 3.6 hereof,
including,  without  limitation,  all  registration  and filing  fees,  printing
expenses,  fees and  disbursements  of counsel for Humboldt,  the expense of any
special audits  incident to  or required by such registration, and blue sky fees

<PAGE>13

and  expenses  are  herein  called  "Registration   Expenses,"  except  for  all
underwriting discounts and selling commissions applicable to the sales, all fees
and  disbursements  of counsel  for any  selling  holder or  holders  (including
counsel  designated  by  any  seller  for a  "due  diligence"  investigation  of
Humboldt), all of which are herein called "Selling Expenses." Humboldt shall pay
all Registration  Expenses and the selling holder or holders of Restricted Stock
being registered shall pay all Selling Expenses.

Section  3.8.  Indemnification.  In the  event of a  registration  of any of the
Restricted Stock under the Securities Act (or any successor  Federal  securities
law)  pursuant to this Article III,  Humboldt  will  indemnify and hold harmless
each  underwriter  of such  Restricted  Stock,  Tehama and its Affiliates as the
transferors of the Restricted Stock or any portion thereof to underwriters,  and
each other  person,  if any, who controls such seller,  assignor or  underwriter
within the  meaning of Section 15 of the  Securities  Act,  against  any losses,
claims,  damages  or  liabilities,  joint  or  several,  to which  such  seller,
underwriter,  assignor  or  controlling  person  may  become  subject  under the
Securities  Act (or such  successor  law) or otherwise,  insofar as such losses,
claims,  damages or liabilities (or actions in respect  thereof) arise out of or
are based upon an untrue  statement or alleged untrue  statement of any material
fact contained in any  registration  statement under which such Restricted Stock
shall have been registered under the Securities Act (or such successor law), any
preliminary  prospectus or final prospectus  contained therein, or any amendment
or supplement thereof, or arise out of or are based upon the omission or alleged
omission  to state  therein a material  fact  required  to be stated  therein or
necessary to make the statements therein not misleading; and will reimburse such
seller,  transferor and  underwriter  and each such  controlling  person for any
legal or any other  expenses  reasonably  incurred  by them in  connection  with
investigating or defending any such loss,  claim,  damage,  liability or action;
provided,  however,  that  Humboldt  will not be  liable in any such case to the
extent that any such loss, claim,  damage or liability arises out of or is based
upon an untrue  statement  or alleged  untrue  statement  or omission or alleged
omission made in such  registration  statement,  said preliminary  prospectus or
said  prospectus  or said  amendment  or  supplement  in  reliance  upon  and in
conformity with written information  furnished to Humboldt through an instrument
executed by such seller,  transferor or underwriter  specifically for use in the
preparation thereof; and provided further that if any losses, claims, damages or
liabilities arise out of or are based upon an untrue  statement,  alleged untrue
statement,  omission or alleged omission contained in any preliminary prospectus
which did not appear in the final  prospectus,  Humboldt shall not have any such
liability with respect thereto to such seller,  transferor or underwriter or any
person who controls such seller, transferor or underwriter within the meaning of
Section 15 of the  Securities  Act if such seller,  transferor or underwriter or
any person on their behalf delivered a copy of the preliminary prospectus to the
person  alleging  such  losses,  claims,  damages or  liabilities  and failed to
deliver a copy of the final  prospectus,  as amended or  supplemented  if it has
been  amended  or  supplemented,  to such  person  at or  prior  to the  written
confirmation of the sale to such person.

In the event of any  registration  of any Restricted  Stock under the Securities
Act (or a successor  Federal  securities law) pursuant to this Article III, each
seller of such Restricted Stock (other than any underwriter or dealer purchasing
Underlying Shares), and Tehama and its Affiliates,  as transferors of Restricted
Stock,  severally and not jointly,  will  indemnify and hold harmless  Humboldt,
each person,  if any who controls  Humboldt  within the meaning of Section 15 of
the  Securities  Act,  each  officer  of  Humboldt  who signs  the  registration
statement and each director of Humboldt against any and all such losses, claims,
damages,  or  liabilities  arising out of or based upon any untrue  statement or
alleged  untrue  statement  in or  omission  or alleged  omission  from any such
registration  statement,  prospectus,  amendment  or  supplement,  if the untrue
statement  or omission  or alleged  untrue  statement  or omission in respect of
which such loss,  claim,  damage or  liability  is asserted was made in reliance
upon and in conformity with  information  furnished in writing to Humboldt by or
on behalf of such seller or transferor  specifically  for use in connection with

<PAGE>14

the  preparation  of  such  registration   statement,   preliminary  prospectus,
prospectus,  amendment or supplement;  provided,  however,  that, if any losses,
claims,  damages  or  liabilities  arise  out of or are  based  upon  an  untrue
statement,  alleged untrue statement,  omission or alleged omission contained in
any preliminary  prospectus which did not appear in the final  prospectus,  such
seller or transferor  shall not have any such liability with respect  thereto to
Humboldt,  any person who controls  Humboldt within the meaning of Section 15 of
the  Securities  Act,  any  officer of  Humboldt  who  signed  the  registration
statement  or any director of Humboldt if Humboldt or any person on their behalf
delivered  a copy of the  preliminary  prospectus  to the person  alleging  such
losses, claims, damages or liabilities and failed to deliver a copy of the final
prospectus,  as amended or supplemented if it has been amended or  supplemented,
to such  person  at or prior  to the  written  confirmation  of the sale to such
person; and provided further that the liability of any such seller or transferor
so to indemnify  shall be limited to an amount equal to the net profit  received
by such seller upon the sale of such Restricted Stock, or if the Option is sold,
the profit on the sale of the Option,  pursuant to such registration  statement,
or by such transferor from the seller, as the case may be.

Payments in respect of  indemnifications  required by this  Section 3.8 shall be
made by periodic payments during the course of the investigation or defense,  as
and when bills are received or expenses  incurred.  Any party which  proposes to
assert the right to be indemnified  under this Section 3.8 will,  promptly after
receipt of notice of commencement of any action, suit or proceeding against such
party in respect of which a claim is to be made  against an  indemnifying  party
under this Section 3.8, notify each such indemnifying  party of the commencement
of such action,  suit or proceeding,  enclosing a copy of all papers served, but
the omission so to notify such  indemnifying  party of any such action,  suit or
proceeding  shall not  relieve  it from any  liability  which it may have to any
indemnified  party  otherwise  than under  this  Section  3.8.  In case any such
action, suit or proceeding shall be brought against any indemnified party and it
shall  notify  the  indemnifying   party  of  the  commencement   thereof,   the
indemnifying  party shall be entitled to participate in, and, to the extent that
it shall wish, jointly with any other indemnifying party similarly notified,  to
assume  the  defense  thereof  with  counsel  reasonably  satisfactory  to  such
indemnified  party,  and  after  notice  from  such  indemnifying  party to such
indemnified  party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying  party shall not be liable to such indemnified  party for any legal
or other expenses,  other than reasonable costs of  investigation,  subsequently
incurred by such indemnified  party in connection with the defense thereof.  The
indemnified  party  shall have the right to employ  its own  counsel in any such
action,  but the fees and  expenses of such  counsel  shall be at the expense of
such  indemnified  party,  when and as incurred,  unless (i) the  employment  of
counsel  by such  indemnified  party  has  been  authorized  in  writing  by the
indemnifying  party, (ii) the indemnified party shall have reasonably  concluded
that there may be a conflict of interest between the indemnifying  party and the
indemnified  party in the  conduct of the  defense of such action (in which case
the  indemnifying  party  shall not have the right to direct the defense of such
action on behalf of the indemnified party) or (iii) the indemnifying party shall
not in fact have  employed  counsel to assume the  defense  of such  action.  An
indemnifying  party  shall not be liable  for  employed  counsel  to assume  the
defense  of such  action.  An  indemnifying  party  shall not be liable  for any
settlement  of any action or claim  effected  without its  consent.  In no event
shall an indemnifying  party be required to pay for more than one counsel for an
indemnified party, exclusive of local counsel.

Section 3.9. Obligations of Humboldt With Respect to Underwritten  Offering.  In
the  event  that  Restricted  Stock  shall be sold  pursuant  to a  registration
statement in an underwritten  offering  pursuant to Section 3.5, Humboldt agrees
to enter into an underwriting agreement containing customary representations and
warranties  with  respect to the  business  and  operations  of an issuer of the
securities  being  registered  and  customary  covenants  and  agreements  to be
performed by such issuer,  including,  without  limiting the  generality  of the
foregoing,  customary  provisions with respect to indemnification by Humboldt of

<PAGE>15

the underwriters of such offering.  Humboldt shall have the right to approve the
managing  underwriters  for such  offering  (which in no event shall  include an
affiliate  of  Tehama);  provided,  however,  that  such  approval  shall not be
unreasonably withheld.

Section 3.10. Rule 144  Requirements.  Humboldt shall undertake to make publicly
available and available to the holders of Restricted Stock, pursuant to Rule 144
of the SEC under the Securities Act, such information as shall be necessary, and
to take such further action as any such holder may reasonably request, to enable
the holders of Restricted  Stock to make sales of Restricted  Stock  pursuant to
the Rule.  Humboldt shall furnish to any holder of Restricted Stock upon request
(after  the  preceding  sentences  shall  have  become  applicable),  a  written
statement  executed  by Humboldt as to the steps it has taken to comply with the
current public information requirements of Rule 144.

Section 3.11.  Rights of First Refusal.

     (a) In the event  Tehama or its  Affiliates  intend,  at any time after the
occurrence  of an  Acquisition  Event  to  sell,  transfer  or  dispose  of  any
Restricted  Stock  (other than to an Affiliate  of Tehama in a  transaction  not
intended to circumvent the transfer  restrictions  contained in this  Agreement)
other  than  (i)  pursuant  to a sale  or  transfer  of  Options  to one or more
underwriters or dealers in accordance with Section 3.4(c) (in which case Section
3.11(b)  shall  govern)  or (ii) at any time after  Humboldt  has failed for any
reason to repurchase such Restricted  Stock pursuant to Article II hereof on the
closing date scheduled for such repurchase, then:

          (i) Tehama shall notify  Humboldt in writing of its or its Affiliate's
     intention to sell,  transfer or dispose of such Restricted Stock specifying
     the number of shares or amount of Options,  as the case may be, proposed to
     be disposed of, the identity or identities of the prospective  purchaser or
     purchasers  thereof,  the proposed purchase price therefor and the material
     terms of any agreement relating thereto (the "Sale Notice"); and

          (ii) Humboldt shall have the right,  by written notice of its exercise
     of its right of first refusal given to Tehama within 15 calendar days after
     Humboldt's receipt of such notice of intention from Tehama, to purchase (or
     to cause a Person  designated  by Humboldt to  purchase)  all, but not less
     than all of, the Restricted Stock specified in such notice of intention for
     cash at the gross price set forth therein (including  broker's  commissions
     and  other  transaction  costs of  Tehama  or its  Affiliate  to be paid or
     absorbed  by the  prospective  purchaser)  if the  terms  set forth in such
     notice  of  intention  provide  for a  cash  sale.  If the  purchase  price
     specified in such notice of intention include any property other than cash,
     the purchase price at which Humboldt shall be entitled to purchase shall be
     (x) the amount of cash  included in the  purchase  price  specified in such
     notice  of  intention   plus  (y)   property,   to  the  extent   feasible,
     substantially similar to the property described in such notice of intention
     and in any case of  equivalent  value to such  property  (as  agreed  to by
     Humboldt and Tehama, or as determined by a nationally recognized investment
     banking firm selected by Tehama and Humboldt).

If  Humboldt  shall  have  exercised  its  right of  first  refusal  under  this
subsection (a) (including the designation of another purchaser as referred to in
the next  subparagraph),  the closing of the purchase of the Restricted Stock as
to which such right of Humboldt  shall have been  exercised  shall take place as
promptly  as  practicable,  but in no event  more than 10  Business  Days  after
Humboldt  gives  notice of such  exercise,  and if such  closing  does not occur
within such 10 days, such right of first refusal provided for herein  (including
any  assignment  thereof)  shall be null and void and of no  further  force  and

<PAGE>16

effect with  respect to such  Restricted  Stock and this  Section  3.11 shall no
longer apply to any sale or  disposition or proposed sale or disposition of such
Restricted  Stock;  provided  that if prior  notification  to or approval of the
Federal  Reserve  Board  or  any  other  regulatory  authority  is  required  in
connection with such purchase,  Humboldt shall promptly file the required notice
or  application  for approval and shall  expeditiously  process the same and the
period of time that  otherwise  would run  pursuant to this  sentence  shall run
instead  from  the  date  on  which,  as the  case  may  be,  (i)  any  required
notification  period has expired or been  terminated,  or (ii) such approval has
been  obtained and, in either event,  any  requisite  waiting  period shall have
passed.

If  Humboldt  elects  not to  exercise,  or  fails  to  exercise  or cause to be
exercised, its right of first refusal provided in this subsection (a) within the
time  specified for such  exercise or if the Federal  Reserve Board or any other
regulatory authority disapproves of Humboldt's proposed purchase, Tehama and its
Affiliates  shall be free  thereafter  for a period of 90 days to consummate the
sale,  transfer or other  disposition  with any  purchaser or  purchasers of the
Restricted  Stock who shall have been  specified in the sale notice at the price
(or at any price in excess of such price) and on the terms specified therein.

The  right of first  refusal  provided  for in this  subsection  (a) may only be
exercised with respect to the initial sale, transfer or other disposition of the
Restricted Stock by Tehama or an Affiliate  (whether in blocks or as a whole) to
a  person  that is not an  Affiliate  of  Tehama  and not to  subsequent  sales,
transfers or other dispositions by purchasers of Restricted Stock.

     (b) If Tehama or its Affiliates at any time propose to transfer any Options
to any  underwriters or dealers pursuant to the provisions of Section 3.4, other
than at any time after  Humboldt  has failed for any reason to  repurchase  such
Options  pursuant to Article II hereof on the closing  date  scheduled  for such
repurchase,  then  Tehama  shall  first  notify  Humboldt  in  writing  of  such
intention,  specifying the Options which it proposes to sell or transfer and the
name or names of the proposed dealers or of the proposed  managing  underwriters
in the  underwriting  syndicate  to which the sale or transfer is proposed to be
made.  Humboldt  shall have the right,  exercisable  by written  notice given to
Tehama 15 calendar days after Humboldt's  receipt of notice from Tehama pursuant
to the immediately preceding sentence, to repurchase,  or to cause a third party
designated  by Humboldt to  purchase,  all,  but not fewer than all, the Options
proposed to be sold or transferred on the terms and conditions  hereinafter  set
forth.  Any notice given by Humboldt of exercise of its repurchase  rights under
this  subsection (b) shall specify a place in Tehama or Humboldt  Counties and a
Business  Day not earlier than 10 days and not later than 15 days after the date
of  such  notice  for  the  closing  of  the  repurchase  of the  Options  being
repurchased.  The  purchase  price  payable to Humboldt or its  designee for the
repurchase of Options pursuant to this paragraph (b) shall be a cash price equal
to the product of (x) the number of  Underlying  Shares  covered by the relevant
Options (calculated as of the date of the closing of the repurchase) and (y) the
Share Price on such date.  At the  closing of a sale of Options  pursuant to the
foregoing  provisions,  Humboldt or its designee  will make payment to Tehama of
the aggregate  price for the Options to be repurchased in one of the manners set
forth in Section  2.1(c).  At such closing,  Tehama shall deliver to Humboldt or
its designee the  certificates  representing  the Options to be repurchased  and
Humboldt  shall  deliver to Tehama  replacement  certificates  representing  the
Options  (if  any)  which  are not to be  repurchased  but were  covered  by the
certificate  or  certificates  surrendered  by Tehama.  Any election by Humboldt
pursuant to this  paragraph  to  exercise  its  repurchase  rights in respect of
Options shall be irrevocable. In the event Humboldt fails timely to exercise its
repurchase rights in respect of Options within the period specified above during
which it must do so or notifies  Tehama in writing  prior to the  expiration  of
such  period that it does not intend to  exercise  such  rights or its  designee
fails to repurchase  Options on the date set for the closing of such a purchase,
Tehama and its  Affiliates  shall be free  thereafter to consummate the sale and

<PAGE>17

transfer  of the  Options  specified  in this  notice  to  Humboldt  under  this
paragraph to any  underwriters  or dealers who agree to exercise the Options and
sell the Underlying  Shares in accordance with the provisions of Section 3.4(c),
and this  Section  3.11 shall no longer  apply to such sale or  transfer of such
Options.

     (c) Tehama shall have the right to withdraw any notice given by it pursuant
to this Section 3.11 at any time before  Humboldt shall have given notice of its
intention  to  exercise  its  right of first  refusal  hereunder  (including  by
designation of another purchaser).


                                   ARTICLE IV
                   REPRESENTATIONS AND WARRANTIES OF HUMBOLDT

Humboldt represents and warrants to Tehama that:

Section 4.1.  Authorization of Agreement; No Conflicts.

     (a) The  execution  and  delivery of this  Agreement  by  Humboldt  and the
consummation of the transactions  contemplated  hereby have been duly authorized
by all necessary  corporate  action on the part of Humboldt.  This Agreement has
been duly executed and delivered by Humboldt and constitutes a valid and binding
obligation of Humboldt, enforceable in accordance with its terms.

     (b) The execution and delivery of this  Agreement and the  consummation  of
the  transactions  contemplated  hereby will not conflict with, or result in any
violation of or default or loss of a material benefit under any provision of the
articles of  incorporation,  articles or  association  or bylaws of Humboldt or,
except for the  necessity  of  obtaining  Requisite  Regulatory  Approvals,  any
material mortgage,  indenture,  lease agreement or other material  instrument or
any permit,  concession,  grant, franchise,  license,  judgment,  order, decree,
statute,  law,  ordinance,  rule or  regulation  applicable to Humboldt or their
respective properties, other than any such conflict,  violation, default or loss
which will not have a material adverse effect on Humboldt.  No material consent,
approval,  order or  authorization  of, or  registration,  declaration or filing
with, any  governmental  authority is required in connection  with the execution
and delivery of this  Agreement by Humboldt or the  consummation  by Humboldt of
the  transactions  contemplated  hereby except for any approvals  required to be
obtained  pursuant to the BHCA or the Policy Statement of the Board of Governors
of the Federal  Reserve System on Nonvoting  Equity  Investments by Bank Holding
Companies,  12  C.F.R.  Section  225.143  (the "FRB  Guidelines"),  or any other
applicable  laws,  for the  execution  and  delivery of this  Agreement  and the
issuance of the Options by Humboldt.

Section 4.2.  Authorized Stock.  Humboldt has taken all necessary  corporate and
other action to authorize and reserve and, subject to obtaining the governmental
and other approvals and consents referred to herein, to permit it to issue, and,
at all times from the date hereof until the  obligation to deliver  Common Stock
upon the exercise of the Options  terminates,  will have  reserved for issuance,
upon  exercise of the Options,  shares of Common Stock  necessary  for Tehama to
exercise the Options,  and Humboldt will take all necessary  corporate action to
authorize  and reserve for  issuance  all  additional  shares of Common Stock or
other securities  which may be issued pursuant to this Agreement.  The shares of
Common  Stock to be issued  upon due  exercise  of the  Options,  including  all
additional  shares of Common  Stock or other  securities  which may be  issuable
pursuant to this Agreement,  upon issuance  pursuant  hereto,  shall be duly and
validly issued,  fully paid and  nonassessable,  and shall be delivered free and

<PAGE>18

clear of all  liens,  claims,  charges  and  encumbrances  of any kind or nature
whatsoever, including any preemptive rights of any stockholder of Humboldt.


                                    ARTICLE V
                    REPRESENTATIONS AND WARRANTIES OF TEHAMA

Tehama represents and warrants to Humboldt that:

Section 5.1.  Due Execution of Agreement; No Conflicts.

     (a) This  Agreement  has been duly  executed  and  delivered  by Tehama and
constitutes a valid and binding obligation of Tehama,  enforceable in accordance
with its terms.

     (b) The execution and delivery of this  Agreement and the  consummation  of
the  transactions  contemplated  hereby will not conflict with, or result in any
violation of or default or loss of a material  benefit  under,  any provision of
the  certificate  of  incorporation  or  Bylaws  of Tehama  or,  except  for the
necessity of obtaining Requisite  Regulatory  Approvals,  any material mortgage,
indenture,  lease,  agreement  or  other  material  instrument,  or any  permit,
concession,  grant, franchise,  license,  judgment, order, decree, statute, law,
ordinance, rule or regulation applicable to Tehama or its respective properties,
other than any such conflict, violation, default or loss which (i) will not have
a material  adverse effect on Tehama and its  Subsidiaries  taken as a whole. No
material  consent,   approval,  order  or  authorization  of,  or  registration,
declaration  or filing with, any  Governmental  Entity is required in connection
with the execution and delivery of this Agreement by Tehama or the  consummation
by  Tehama of the  transactions  contemplated  hereby,  except  for (a)  filings
required  in  order  to  obtain  Requisite  Regulatory  Approvals,  and  (b) any
approvals required to be obtained pursuant to the BHCA, or the FRB Guidelines or
any other  applicable  law for the execution  and delivery of this  Agreement by
Humboldt, Tehama and the issuance of the Options.


                                   ARTICLE VI
                                   DEFINITIONS

Except as otherwise  provided herein,  the capitalized terms set forth below (in
their singular and plural forms as applicable) shall have the meanings set forth
below.

"Change in Bank Control  Act" means the Change in Bank  Control Act of 1978,  as
amended.

"Covered  Shares"  shall  mean on any date,  with  respect to any  Options,  the
maximum  number of shares of Common  Stock  that would be  purchasable  upon the
exercise  on such  date of such  Options,  assuming  that  such  Options  may be
exercised on such date to purchase the maximum  number of shares of Common Stock
purchasable  pursuant to the terms thereof (including the limitations  contained
in the second paragraph of the certificate  evidencing each such Option) without
regard  to any  provision  therein  (other  than  such  limitations)  or in this
Agreement  or in any law  limiting  the right of any  holder of such  Options to
acquire shares otherwise purchasable thereunder.

<PAGE>19

"Market  Value" shall mean, on any date,  the average of the closing sale prices
of a share of Common  Stock on the  principal  securities  exchange on which the
shares of Common Stock are traded,  or, if the shares of Common Stock are not at
the time listed on any national securities exchange, as reported by the National
Association of Securities Dealers Automated Quotation System ("NASDAQ"),  on the
20  trading  days  immediately  preceding  the three  trading  days  immediately
preceding such date, (or such fewer number of trading days immediately preceding
such date for which  shares of Common Stock have been listed for trading on such
exchange  or quoted  on  NASDAQ);  provided,  however,  that if  Tehama  seeks a
determination  of the fair market value of a share of Common  Stock  pursuant to
the provisions of Section 2.2, Market Value shall,  if required  pursuant to the
terms of such Section,  mean the fair market value of a share of Common Stock on
such date determined pursuant to such Section.

"Option  Call Price"  shall  mean,  when used with  respect to any  Option,  the
product  of (i) the  number  of  Covered  Shares on such date and (ii) the Share
Price on such date.

"Requisite Regulatory Approvals" shall mean all material permits,  approvals and
consents  required to be obtained,  and all waiting periods  required to expire,
prior to the consummation of the issuance of the Covered Shares under applicable
federal  laws of the  United  States  or  applicable  laws of any  state  having
jurisdiction over Tehama or Humboldt.

"Share Price" shall mean,  with respect to any Options,  the amount by which, on
the  date  of  the  Acquisition  Event  triggering  the  exercisability  of  the
Options(i) the Option Price on such date is less than (ii) the greatest of:

          (i) the Market Value of a share of Common Stock on such date; and

          (ii) the  highest  price  paid on or prior to such date for a share of
     Common Stock (including in any merger or  consolidation)  by a purchaser or
     group of  purchasers  acting in concert  of 50% or more of the  outstanding
     shares of Common  Stock,  or, in the case of a purchaser  of 50% or more of
     the  consolidated  assets of Humboldt (as shown on the books of  Humboldt),
     the Market Value of a share of Common Stock on the date of  consummation of
     such asset acquisition.


                                   ARTICLE VII
                                   TERMINATION

Section  7.1.  Termination.  Subject  to  Section  7.2,  this  Agreement  may be
terminated in the following circumstances:

     (a) at the Effective Time of the Merger, as set forth in the Reorganization
Agreement; or

     (b) at  the  termination  of  the  Reorganization  Agreement  prior  to the
occurrence of an Acquisition Event.

Section  7.2.  Effect  of  Termination.  In the  event  of  termination  of this
Agreement  pursuant to Section  7.1(b),  the rights of the parties  hereto shall
forthwith become void; provided that, if this Agreement shall terminate pursuant
to Section 7.1(b) and any party has filed an application to purchase  securities
with any regulatory authority, this Agreement shall not terminate as provided in

<PAGE>20

Section 7.1(b), but shall remain in full force and effect until the day which is
30 Business  Days (plus any  applicable  waiting  periods)  after the receipt or
denial of regulatory approval or consent, at which time the Agreement shall then
terminate.

Section 7.3.  Indemnification For Breach. Each party to this Agreement agrees to
indemnify and hold harmless the other party against any loss,  claim,  damage or
liability  arising  out of or based  upon a Default  of this  Agreement  by such
defaulting  party  in  accordance  with  the  procedures  set  forth in the last
paragraph of Section 3.8 of this Agreement.


                                  ARTICLE VIII
                               GENERAL PROVISIONS

Section 8.1. Notices. All notices and other communications hereunder shall be in
writing  and  shall be  deemed  given  if  delivered  personally  or  mailed  by
registered or certified  mail (return  receipt  requested) to the parties at the
following addresses (or any such other address for a party as shall be specified
by like notice):

        (a)    If to Tehama:

               Mr. William P. Ellison
               President & Chief Executive Officer
               Tehama Bancorp
               239 South Main Street
               Red Bluff, California 96080
               Telecopier No.: (530) 528-3020

               With copies to:

               John W. Carr, Esq.
               Shapiro, Buchman, Provine & Patton LLP
               1333 North California Boulevard, Suite 350
               Walnut Creek, California 94596
               Telecopier No.: (925) 944-9701

        (b)    If to Humboldt:

               Mr. Theodore S. Mason
               President & Chief Executive Officer
               Humboldt Bancorp
               701 Fifth Street
               Eureka, California 95501
               Telecopier No.:(707) 441-0214


<PAGE>

               With copies to:

               Gary Steven Findley, Esq.
               Gary Steven Findley & Associates
               1470 North Hundley Street
               Anaheim, California 92806
               Telecopier No.: (714) 630-7910

Section  8.2.  Counterparts.  This  Agreement  may be  executed  in one or  more
counterparts,  all of which shall be considered one and the same agreement,  and
shall become effective when one or more counterparts have been signed by each of
the parties and delivered to the other  parties,  it being  understood  that all
parties need not sign the same counterpart.

Section 8.3. Amendment.  This Agreement may be amended by the parties hereto, by
action taken by their  respective  Boards of  Directors  or the duly  authorized
committees thereof. This Agreement may not be amended except by an instrument in
writing signed on behalf of each of the parties hereto. The parties hereto agree
to make such  amendments  as may be  necessary  to respond to the request of any
Regulatory Authority with respect to this Agreement.

Section 8.4.  Waiver.  Any term or provision of this  Agreement may be waived in
writing at any time by the party which is, or whose  shareholders  are, entitled
to the benefits thereof.

Section  8.5.  Miscellaneous.   This  Agreement  (including  the  documents  and
instruments  referred  to  herein)  (a)  constitutes  the entire  agreement  and
supersedes all prior agreements and understandings, both written and oral, among
the  parties  with  respect  to  the  subject  matter  hereof;   (b)  except  as
contemplated in this Agreement,  is not intended to confer upon any person other
than the  parties  hereto any rights or  remedies  hereunder;  and (c) except as
contemplated  in this  Agreement,  shall not be assigned by  operation of law or
otherwise.  Humboldt and Tehama agree that,  except as required by law, it shall
not issue any press  release with respect to the  transactions  contemplated  by
this Agreement without consulting with each other party hereto.

Section 8.6. Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of California.

IN WITNESS WHEREOF,  Humboldt and Tehama have caused this Agreement to be signed
by their respective officers thereunto duly authorized, all as of the date first
above written.

HUMBOLDT BANCORP                        TEHAMA BANCORP



____________________________________    ____________________________________
Theodore S. Mason                       William P. Ellison
President & Chief Executive Officer     President & Chief Executive Officer

<PAGE>

                                    EXHIBIT A

                                HUMBOLDT BANCORP
                                  OPTION NO. 1

September 20, 2000                                            1,470,000 Shares


This is to  certify  that,  for  value  received  and  subject  to the terms and
conditions provided for in a Humboldt Bancorp Stock Option Agreement dated as of
September 20, 2000 (the "Agreement") by and between Tehama Bancorp, a California
corporation   ("Tehama"),   and  Humboldt  Bancorp,  a  California   corporation
("Humboldt"),  pursuant to which Tehama and its assigns are entitled to purchase
from Humboldt,  on the terms and conditions set forth therein,  1,470,000  fully
paid and  nonassessable  shares of common  stock of Humboldt  ("Common  Stock"),
subject to adjustment as provided in the Agreement.  Terms not otherwise defined
herein shall have the meanings ascribed to them in the Agreement.

This Option may be exercised by the holder (except any holder which shall not be
permitted by the Bank Holding Company Act of 1956, as amended ("BHCA"), or other
applicable  law to own,  or shall not have  obtained  all  regulatory  approvals
required by such Act or other  applicable law as a precondition to its ownership
of, the shares of Common  Stock  covered  hereby) as to the whole or any part of
the shares of Common Stock covered  hereby at any time when such exercise  shall
be permitted under the terms of this Option,  by surrender of this Option at the
principal  office of  Humboldt  or at the office of any  transfer  agent for the
Option and upon  payment to Humboldt of the Option Price for shares so purchased
by wire  transfer to a bank  account  designated  by Humboldt.  Thereupon,  this
Option shall be deemed to have been exercised and the person exercising the same
to have  become a holder of  record  of shares of Common  Stock (or of the other
securities  or property to which it is entitled  upon such  exercise)  purchased
hereunder for all purposes, and such property or certificates for such shares or
securities  so purchased  shall be delivered  to the  purchaser.  If this Option
shall be exercised  in respect of a part of the shares of Common  Stock  covered
hereby, the holder shall be entitled to receive a new Option covering the number
of shares in respect of which this  Option  shall not have been  exercised,  but
otherwise identical hereto.

This Option is  exchangeable,  upon the surrender hereof by the holder hereof at
such office or agency of Humboldt, for new Options of this tenor representing in
the aggregate the right to subscribe for and purchase the number of shares which
may be  subscribed  for and  purchased  hereunder,  each of such new  Options to
represent  the right to subscribe for and purchase not less than 1,000 shares of
Common  Stock  (except to the extent  necessary  to round out the balance of the
number of shares purchasable hereunder).

Humboldt  covenants  and  agrees  that all shares  which may be issued  upon the
exercise of the rights represented by this Option will, upon issuance,  be fully
paid and nonassessable  and free from all taxes,  liens and charges with respect
to the issue  thereof  (other  than taxes in respect of any  transfer  occurring
contemporaneously  with such issue).  Humboldt further covenants and agrees that
during the period  within  which the rights  represented  by this  Option may be
exercised,  Humboldt  will  at  all  times  have  authorized,  and  reserved,  a
sufficient  number of shares of Common  Stock to provide for the exercise of the
rights  represented by this Option,  and will at its expense  expeditiously upon
each such  reservation  of shares use its best  efforts to procure  the  listing
thereof  (subject to issuance or notice of issuance)  on all stock  exchanges on
which the shares of Common Stock are then listed,  or if Humboldt Shares are not
then listed on a stock exchange on the NASDAQ National Market System.

<PAGE>

The  rights of the  holder of this  Option  shall be  subject  to the  following
further terms and conditions:

Section 1.1.  Humboldt shall at all times reserve and keep available,  free from
preemptive  rights, out of its authorized and unissued Common Stock or shares of
Common Stock held in treasury, for the purpose of effecting the exercise of this
Option,  the full  number  of  shares of Common  Stock  then  issuable  upon the
exercise of this and all other outstanding  Options,  computed on the assumption
that the  adjustments  required by the Agreement have become  effective,  in the
event such is not then the case.

Section 1.2.  Humboldt will pay any and all taxes that may be payable in respect
of the issue or delivery of shares of Common Stock upon exercise of this Option.
Humboldt shall not, however,  be required to pay any tax which may be payable in
respect of any  transfer  involved in the issue and delivery of shares of Common
Stock in a name  other  than that of the  holder of the  Option or Options to be
exercised,  and no such  issue or  delivery  shall be made  unless and until the
person requesting such issue has paid to Humboldt the amount of any such tax, or
has established, to the satisfaction of Humboldt, that such tax has been paid.

Section  1.3.  This  Option  shall not  entitle  the  holder to any  rights of a
shareholder  of  Humboldt,  either  at law or in  equity,  or to any  notice  of
meetings of shareholders or of any other proceedings of Humboldt.

Section 1.4.  Subject to Section 1.5 and the terms and  conditions  set forth in
the Agreement,  this Option and all rights  hereunder are transferable (in whole
or in part), on the books of Humboldt by the registered holder thereof in person
or by  duly  authorized  attorney,  upon  surrender  of  this  Option,  properly
endorsed,  to Humboldt (or if Humboldt shall have notified the registered holder
hereof of the appointment of an independent transfer agent for Options,  then to
such  transfer  agent).  As used  herein the term "this  Option"  shall mean and
include any Option or Options  hereafter  issued in  consequence of transfers of
this Option in whole or in part.

Section 1.5. THIS OPTION HAS NOT BEEN  REGISTERED  UNDER THE  SECURITIES  ACT OF
1933,  AS  AMENDED  (THE  "SECURITIES  ACT").  THIS  OPTION  MAY  NOT BE SOLD OR
TRANSFERRED EXCEPT PURSUANT TO (i) A REGISTRATION STATEMENT WITH RESPECT TO THIS
OPTION  WHICH IS  EFFECTIVE  UNDER THE  SECURITIES  ACT,  OR (ii) AN  OPINION OF
COUNSEL  THAT  AN  EXEMPTION  FROM  REGISTRATION  UNDER  THE  SECURITIES  ACT IS
AVAILABLE.  THE  TRANSFERABILITY  OF  THIS  OPTION  IS  FURTHER  SUBJECT  TO THE
PROVISIONS OF A STOCK OPTION AGREEMENT DATED AS OF SEPTEMBER 20, 2000, A COPY OF
WHICH IS AVAILABLE FOR INSPECTION AT THE OFFICE OF THE SECRETARY OF THE HUMBOLDT
BANCORP.

Section 1.6. The holder of this Option,  by the acceptance  hereof,  agrees that
prior to the exercise of any Options,  at a time when said Options have not been
registered under the Securities Act or any similar Federal statute,  it will, if
it has not  requested or is then not entitled to such  registration  pursuant to
the  provisions of Article III of the  Agreement,  deliver to Humboldt a written
representation that it is acquiring the shares of Common Stock issuable upon the
exercise of such Options for its own account for investment, and not with a view
to, or for sale in connection with, any distribution  thereof,  and not with any
present intention of distributing or selling the same.

<PAGE>


Section 1.7.

     (a) This Option  shall  terminate  and be of no further  force or effect as
provided in Article VII of the Agreement.

     (b)  Notwithstanding  any other provision contained herein, this Option and
the rights conferred hereby shall terminate,  and the full consideration paid by
Tehama for this  Option  shall be  immediately  due and  payable  to Tehama,  if
Humboldt or Tehama receives written notice from the Federal Reserve Board to the
effect that the  execution  and delivery of the Agreement or the issuance of the
Options is not consistent with Section 3 of the BHCA.

Section 1.8. This Option shall be governed by and  construed in accordance  with
the laws of the State of California.

Section  1.9.  This  Option  incorporates  by  reference  all of the  terms  and
conditions of the Agreement.

                                        HUMBOLDT BANCORP


                                        ------------------------------------
                                        Theodore S. Mason
                                        President & Chief Executive Officer


                                        ------------------------------------
                                        Alan Smyth
                                        Secretary




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