ULTRAMAR DIAMOND SHAMROCK CORP
S-8, 1997-05-23
PETROLEUM REFINING
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As filed with the Securities and Exchange Commission on May 22, 1997

                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

                                 FORM S-8

                        REGISTRATION STATEMENT UNDER
                         THE SECURITIES ACT OF 1933

                   ULTRAMAR DIAMOND SHAMROCK CORPORATION
           (Exact name of registrant as specified in its charter)

      Delaware                                  13-3663331               
(State of Incorporation)                      (IRS Employer
                                              Identification No.)

                          9830 Colonnade Boulevard
                         San Antonio, Texas  78230
                 (Address of principal executive offices)

       ULTRAMAR DIAMOND SHAMROCK CORPORATION NONQUALIFIED 401(k) PLAN
                         (Full title of the plan)

                         Patrick J. Guarino, Esq.
          Executive Vice President, General Counsel, and Secretary
                   Ultramar Diamond Shamrock Corporation
                          9830 Colonnade Boulevard
                         San Antonio, Texas 78230         
                               (210) 641-6488      
                    (Name, address and telephone number,
                 including area code, of agent for service)

                      CALCULATION OF REGISTRATION FEE

                              Proposed     Proposed
                              maximum      maximum
Title of         Amount       offering     aggregate        Amount of
securities to    to be        price per    offering         registra-
be registered    registered   share        price            tion fee

Common Stock,    101,015      $31.125 (2)  $3,144,091.88 (2)  $1084.18  (2)
par value $.01
per share(1)


(1)  Includes associated rights to purchase Ultramar Diamond Shamrock
     Corporation Common Stock exercisable pursuant to the Rights Agreement
     filed as Exhibit 4.2 hereto.

(2)  Estimated solely for the purpose of computing the registration fee in
     accordance with Rule 457(h)and Rule 457(c), based on the market value
     of shares of Common Stock of  Ultramar Diamond Shamrock Corporation
     (the "Company") of $31.125 per share, which is the average of the high
     and low sale prices thereof on the Composite Tape of the New York
     Stock Exchange on May 16, 1997.

                                  PART II
             INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  Incorporation of Documents by Reference

     The following documents filed with the Securities and Exchange
Commission (the "Commission") by Ultramar Diamond Shamrock Corporation,
formerly Ultramar Corporation (the "Company") are incorporated herein by
reference:

     (a)     The Company's 1996 Annual Report on Form 10-K for the fiscal
year ended December 31, 1996, filed pursuant to Section 13(a) of the
Securities Exchange Act of 1934, as amended (the "1934 Act");

     (b)     The Company's Quarterly Reports on Form 10-Q for the fiscal
quarter ended March 31, 1997, and all other reports, if any, filed by the
Company pursuant to Section 13(a) or 15(d) of the 1934 Act since the end
of
the fiscal year ended December 31, 1996;

     (c)     The Company's Current Report on Form 8-K dated March 4, 1997,
and the Company's Amendment to Current Report on Form 8-K/A dated March 4,
1997; and

     (d)     The description of Common Stock of the Company contained in
the Company's Registration Statement on Form S-4 (File No. 333-14807).

     All documents filed by the Company pursuant to Sections 13(a), 13(c),
14, or 15(d) of the 1934 Act subsequent to the filing of this Form S-8
Registration Statement (the "Registration Statement") and prior to the
filing of a post-effective amendment which indicates that all securities
offered have been sold or which deregisters all securities then remaining
unsold shall be deemed to be incorporated by reference herein and to be a
part hereof from the respective dates of the filing of such documents.

Item 5.     Interests of Named Experts and Counsel

                                  EXPERTS

     The consolidated financial statements and schedule of Ultramar Diamond
Shamrock Corporation appearing in the Company's Annual Report  (Form 10-K)
for the year ended December 31, 1996, have been audited by Ernst & Young
LLP, independent auditors, as set forth in their report thereon included
therein and incorporated herein by reference, which, as to all periods
presented, is based in part on the report of Price Waterhouse LLP,
independent accountants.  Such financial statements are, and certain
audited financial statements to be included in subsequently filed documents
will be, incorporated herein and therein in reliance upon the reports of
Ernst & Young LLP and Price Waterhouse LLP, pertaining to such financial
statements and schedule (to the extent covered by consents filed with the
Securities and Exchange Commission) given upon the authority of such firms
as experts in accounting and auditing.

                                LEGAL MATTERS

     The validity of the shares of the Company's Common Stock being offered
hereby has been passed upon for the Company by Todd Walker, Esq., Corporate
Counsel for the Company.  Mr. Walker beneficially owns shares of the Common
Stock of the Company as a result of his participation in various Company
employee benefit plans.

Item 6.     Indemnification of Directors and Officers.

     The By-laws of the Company provide that the Company shall indemnify
its officers and directors to the fullest extent permitted or required by
the Delaware General Corporation Law (the "DGCL"), as amended from time to
time, provided, however, that except insofar as the Company's By-laws
provide indemnification for an officer or director with respect to a
proceeding initiated by such officer or director to enforce rights to
indemnification, officers and directors will not be entitled to
indemnification in connection with proceedings initiated by an officer or
director if the initiation of such proceedings was not authorized by the
board of directors of the Company.  Section 145 of the DGCL provides, in
general, that each director and officer of a corporation may be indemnified
against expenses (including attorneys' fees, judgments, fines, and amounts
paid in settlement) actually and reasonably incurred in connection with the
defense or settlement of any threatened, pending, or completed legal
proceedings in which he is involved by reason of the fact that he is or was
a director or officer of the Company, if he acted in good faith and in a
manner that he reasonably believed to be in or not opposed to the best
interests of the Company, and, with respect to any criminal action or
proceeding, if he had no reasonable cause to believe that his conduct was
unlawful.  If the legal proceeding, however, is by or in the right of the
Company, the director or officer may not be indemnified in respect of any
claim, issue, or matter as to which he shall have been adjudged to be
liable for negligence or misconduct in the performance of his duty to the
Company unless a court determines otherwise.

     The Company's By-laws also provide for advances in certain
circumstances covering expenses incurred by an officer or director of the
Company in connection with the defense of a proceeding for which such
officer or director would be entitled to indemnity under the Company's
By-laws.

     The Company's By-laws further provide that the Company may procure and
maintain insurance covering director's and officer's liability for their
actions in those capacities, whether or not the Company would be entitled
to provide indemnification for such liability under the DGCL.

     The Certificate of Incorporation of the Company provides that the
personal liability of the directors of the Company shall be eliminated to
the fullest extent permitted by applicable law.  The DGCL permits a
corporation's certificate of incorporation to provide that no director of
the corporation shall be personally liable to the corporation or its
stockholders for monetary damages for any breach of his fiduciary duty as
a director; provided, however, that such provision shall not apply to any
liability of a director (1) for any breach of a director's duty of loyalty
to the corporation or its stockholders, (2) for acts or omissions that are
not in good faith or involve intentional misconduct or a knowing violation
of the law, (3) under Section 174 of the DGCL or (4) for any transaction
from which the director derived an improper personal benefit.

     The Company has entered into indemnification agreements with the
directors and certain officers of the Company providing for indemnification
on the terms set out in the By-laws of the Company.

Item 8.     Exhibits.

Exhibit
Number       Description

4.1          Ultramar Diamond Shamrock Corporation Nonqualified 401(k)
             Plan, Amended and Restated Effective January 1, 1997

4.2          Rights Agreement, dated June 25, 1992, between the Company and
             Registrar and Transfer Company (as successor rights agent to
             First City, Texas-Houston, National Association), as amended
             by the First Amendment dated October 26, 1992, the Amendment
             dated May 10, 1994 and the Amendment dated September 22, 1996
             (incorporated by reference to Exhibit 4.2 of the Company's
             Registration Statement on Form S-1 (File No. 33-47586),
             Exhibit 4.2 of the Company's Quarterly Report on Form 10-Q for
             the quarter ended September 30, 1992, Exhibit 4.3 to the
             Company's Annual Report on Form 10-K for the year ended
             December 31, 1994 and Exhibit 4.1 of the Company's Current
             Report on Form 8-K dated September 25, 1996)*

5.1          Opinion regarding legality of securities being issued 

23.1         Consent of Price Waterhouse LLP

23.2         Consent of Ernst & Young LLP

23.3         Consent of Todd Walker, Esq. (included in Exhibit 5.1)

24.1         Powers of Attorney of Directors and Officers of the Company

24.2         Certificate regarding resolutions of the Board of Directors
             of the Company

*     Each document marked by an asterisk is incorporated herein  by
      reference to the designated document previously filed with the
      Commission.

Item 9.     Undertakings.

A.     The Company hereby undertakes

     (1)     to file, during any period in which offers or sales are being
made, a post-effective amendment to this Registration Statement (a) to
include any prospectus required by Section 10(a) (3) of the Securities Act
of 1933, as amended (the "1933 Act"), (b) to reflect in the prospectus any
facts or events arising after the effective date of this Registration
Statement (or the most recent post-effective amendment hereof) which,
individually or in the aggregate, represents a fundamental change in the
information set forth in this Registration Statement, and (c) to include
any material information with respect to the plan of distribution not
previously disclosed in this Registration Statement or any material change
to such information in this Registration Statement;

     (2)     that, for the purpose of determining any liability under the
1933 Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof; and

     (3)     to remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the
termination of the offering.

B.     The Company hereby undertakes that, for purposes of determining any
liability under the 1933 Act, each filing of the Company's annual report
pursuant to Section 13(a) or Section 15(d) of the 1934 Act that is
incorporated by reference in the Registration Statement shall be deemed to
be a new registration statement relating to the securities offered therein,
and the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.

C.     Insofar as indemnification for liabilities arising under the 1933
Act may be permitted to directors, officers and controlling persons of the
Company pursuant to the foregoing provisions or otherwise, the Company is
advised that, in the opinion of the Commission, such indemnification is
against public policy as expressed in the 1933 Act and is, therefore,
unenforceable.  In the event that a claim for indemnification against such
liabilities (other than the payment by the Company of expenses incurred or
paid by a director, officer or controlling person of the Company in the
successful defense of any action, suit or proceeding) is asserted by a
director, officer or controlling person in connection with the securities
being registered, the Company will, unless in the opinion of counsel for
the Company the matter has been settled by controlling precedent, submit
to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the 1933 Act
and will be governed by the final adjudication of such issue.

                                 SIGNATURES

Pursuant to the requirements of the 1933 Act, the Company certifies that
it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8 and has duly caused this Registration Statement to be
signed on its behalf by the undersigned, thereunto duly authorized, in the
City of San Antonio, Texas, on the 22nd day of May, 1997.

                              ULTRAMAR DIAMOND SHAMROCK CORPORATION


                              
                              By:  *R. R. Hemminghaus
                                   Chairman of the Board and
                                   Chief Executive Officer

Pursuant to the requirements of the 1933 Act, this Registration Statement
has been signed by the following persons in the capacities and on the date
indicated:

Signature                    Title                       Date


*R. R. Hemminghaus          Chairman of the Board        May 22, 1997
                            and Chief Executive
                            Officer

*H. Pete Smith              Executive Vice               May 22, 1997
                            President and Chief
                            Financial Officer     
                            (Principal Financial
                            Officer and Principal     
                            Accounting Officer)

*Byron Allumbaugh           Director                     May 22, 1997

*E. Glenn Biggs             Director                     May 22, 1997

*W. E. Bradford             Director                     May 22, 1997

*H. Frederick Christie      Director                     May 22, 1997

*W. H. Clark                Director                     May 22, 1997

*Jean Gaulin                Vice-Chairman of 
                            the Board, President,
                            and Chief Operating
                            Officer                      May 22, 1997

*Russel H. Herman           Director                     May 22, 1997

*Bob Marbut                 Director                     May 22, 1997

*Katherine D. Ortega        Director                     May 22, 1997

*Madeleine Saint-Jacques    Director                     May 22, 1997

*C. Barry Schaefer          Director                     May 22, 1997


*Todd Walker, by signing his name hereto, does hereby sign this
Registration Statement on Form S-8 on behalf of Ultramar Diamond Shamrock
Corporation and each of the above-named officers and directors of Ultramar
Diamond Shamrock Corporation pursuant to powers of attorney executed on
behalf of the Company and each of such officers and directors.


                              By:  /s/ Todd Walker
                                   Attorney-in-fact
                                  May 22, 1997

<PAGE>
                             INDEX TO EXHIBITS
Exhibit
No.            Description

4.1            Ultramar Diamond Shamrock Corporation Nonqualified 401(k)
               Plan, Amended and Restated Effective January 1, 1997

4.2            Rights Agreement, dated June 25, 1992, between the Company
               and Registrar and Transfer Company (as successor rights
               agent to First City, Texas-Houston, National Association),
               as amended by the First Amendment dated October 26, 1992,
               the Amendment dated May 10, 1994 and the Amendment dated
               September 22, 1996 (incorporated by reference to Exhibit 4.2
               of the Company's Registration Statement on Form S-1 (File
               No. 33-47586), Exhibit 4.2 of the Company's Quarterly Report
               on Form 10-Q for the quarter ended September 30, 1992,
               Exhibit 4.3 to the Company's Annual Report on Form 10-K for
               the year ended December 31, 1994 and Exhibit 4.1 of the
               Company's Current Report on Form 8-K dated September 25,
               1996)*

5.1            Opinion regarding legality of securities being issued 

23.1           Consent of Price Waterhouse LLP

23.2           Consent of Ernst & Young LLP

23.3           Consent of Todd Walker, Esq. (included in Exhibit 5.1)

24.1           Powers of Attorney of Directors and Officers of the Company

24.2           Certificate regarding resolutions of the Board of Directors
               of the Company


*     Each document marked by an asterisk is incorporated herein  by
      reference to the designated document previously filed with the
      Commission.


W3302.lW 

              ULTRAMAR DIAMOND SHAMROCK CORPORATION
                     NONQUALIFIED 401(k) PLAN

          AMENDED AND RESTATED EFFECTIVE JANUARY 1, 1997

1.  Purpose of Plan.

    It is the purpose of this Plan to enable each employee who is in a
    select group of management and who is considered a highly
    compensated employee (as defined by the Internal Revenue Service) to
    defer part of Compensation payable for future services to be
    performed by such employee as an Executive of the Corporation.  For
    1997, an employee who earns at least Eighty Thousand and one/100
    Dollars  ($80,000.01) in 1996  in compensation is considered a
    highly compensated employee.   The dollar amount may be adjusted
    each year by the Internal Revenue Service for cost of living
    increases in accordance with Internal Revenue Code Sections 414(q)
    and 415(d)).   However, employees who were employed by Ultramar
    prior to the merger of Ultramar and Diamond Shamrock, Inc. shall not
    be eligible to participate in this Plan until January 1, 1998.

2.  Definitions.

    The following definitions are used throughout the Plan:

    (a)  "Account" means the account, described in Section 7 below, to
         which is credited Compensation deferred in accordance with this
         Plan.

    (b)  "Administrator" means the person designated by the Board of
         Directors or by the committee described by Section 2(d) hereof
         with power and authority to construe, interpret and administer
         this Plan pursuant to Section 12 below.
 
    (c)  "Benefit Review Committee" means the committee appointed by the
         President, Chairman of the Board and Chief Executive Officer of
         the Corporation pursuant to Section 12(c) hereof with power and
         authority to construe the Plan and determine all questions of
         eligibility and interpretation under the Plan pursuant to
         Section 12(c) below, except with respect to non-employee
         Directors.

    (d)  "Beneficiary" means the person or persons designated from time
         to time by a Participant to receive payments under this Plan
         after the Participant's death, using the Notice of Beneficiary
         Designation, a form of which is attached as Exhibit C, or some
         other method of designation which provides Beneficiary
         designation information similar to that in such Notice for
         Beneficiary Designation.

    (e)  "Board" or "Board of Directors" means the Board of Directors of
         the Corporation or any committee of such Board of Directors to
         the extent that such committee has been delegated authority to
         act on behalf of the Board of Directors with respect to this
         Plan.

    (f)  "Cause" means failure to return from a leave of absence,
         criminal activity, or willful misconduct or gross negligence in
         the performance of duties or in the observation of written
         Corporation personnel policies applicable to the Executive.

    (g)  "Change in Control" will be deemed to have occurred when (1) a
         report is filed on Schedule 13D or Schedule 14D-1 (or any
         successor schedule, form or report), each as promulgated
         pursuant to the Securities Exchange Act of 1934, as amended
         (the "Exchange Act"), disclosing that any person (as the term
         "person" is used in Section 13(d)(3) or Section 14(d)(2) of the
         Exchange Act) has become the beneficial owner (as the term
         "beneficial owner" is defined under Rule 13d-3 or any successor
         rule or regulation promulgated under the Exchange Act) of
         securities representing more than 25% of the combined voting
         power of the then-outstanding voting securities of the
         Corporation and such acquisition has not been authorized,
         approved or recommended by majority vote of the Board of
         Directors prior to the date of the filing of such report, or    
         (2) such other event has occurred which the Board of Directors
         may, in its sole discretion, by majority vote determine to
         constitute a change in control. 

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

    (i)  "Common Stock" means whole shares of common stock of the
          Corporation.

    (j)  "Compensation" means payments that may be made by the          
         Corporation to a Director Participant for services on the
         Corporation's Board of Directors or on any committee of the
         Board, including retainer fees to be paid in cash and meeting
         fees, and payments that may be made by the Corporation to an
         Executive Participant for services rendered to the Corporation,
         including base salary and annual performance incentives.

    (k)  "Corporation" means Ultramar Diamond Shamrock Corporation, a
         Delaware corporation, or, where the context requires, any
         affiliate or subsidiary of Ultramar Diamond Shamrock
         Corporation.  Notwithstanding the foregoing, prior to December
         3, 1996, the term Corporation shall mean Diamond Shamrock,
         Inc., or, where the context requires any affiliate or
         subsidiary of Diamond Shamrock, Inc.

    (l)  "Director" means a member or honorary member of the Board of
         Directors of the Corporation.

    (m)  "Director Participant" means any Director who is an employee
         compensated for his services on the Board of Directors, or on
         any committee of the Board, and who participates in this Plan. 
         Notwithstanding the foregoing, no Director Participant who is
         not an employee of the Corporation can make an Elective
         Deferral under the terms of this Plan after December 3, 1996.

    (n)  "Effective Date" of this restatement means January 1, 1997. 
         The original plan was effective January 1, 1996.

    (o)  "ERISA" means the Employee Retirement Income Security Act of
         1974, as amended.

    (p)  "Executive" means any employee of the Corporation who is in a
         select group of management and who is a highly compensated
         employee ( as defined by the Internal Revenue Service).   For
         1997, an employee who earns at least Eighty Thousand and
         one/100 Dollars ($80,000.01) in 1996 in compensation is
         considered a highly compensated employee.  The dollar amount
         may be adjusted each year by the Internal Revenue Service for
         cost of living increases in accordance with Internal Revenue
         Code sections 414(q) and 415(d)).

    (q)  "Executive Participant" means any Executive who participates in
         this Plan.

    (r)  "401(k) Plan" means the Diamond Shamrock, Inc. 401(k)
         Retirement Savings Plan.

    (s)  "Notice of Beneficiary Election" means the notice provided for
         in Section 12 below. 

    (t)  "Notice of Election" means the notice provided for in Section 5
         below.

    (u)  "Participant" means any Director Participant or Executive
         Participant as the case may be.

    (v)  "Plan" means the Ultramar Diamond Shamrock Corporation
         Nonqualified 401(k) Plan, as amended.  The original plan was
         referred to as the Diamond Shamrock, Inc. Nonqualified 401(k)
         Plan.

    (x)  "Year of Service" means, with respect to a Director
         Participant, a 12-consecutive-month period during which a
         Director Participant served as a separately compensated member
         of the Board of Directors.  With respect to an Executive
         Participant, service and year of service shall be determined in
         the same manner as they are determined in the 401(k) Plan.

3.  Eligibility.

    (a)  Any Director of the Corporation who is also an employee of the
         Corporation shall be eligible to participate in this Plan;
         provided, however, that any employee Director who initially is
         compensated after January 1, in any calendar year, shall become
         eligible to participate in this Plan beginning January 1 of the
         following calendar year.

    (b)  Any Executive of the Corporation shall be eligible to
         participate in this Plan; provided, however, that any person
         who initially becomes an Executive after January 1 in any
         calendar year shall become eligible to participate in this Plan
         beginning January 1 of the following calendar year.

    (c)  Effective after December 3, 1996, a Director of the Corporation
         who is not an employee of the Corporation shall not be eligible
         to make Elective Deferrals under the terms of the Plan;
         however, the account of such a Director Participant shall
         continue to be maintained under the terms of the Plan.

4.  Account Credits.

    Accounts will be credited with Elective Deferrals and Matching
    Contributions.

    (a)  Elective Deferrals.  "Elective Deferrals" are amounts credited
         to the Accounts of Participants who have agreed to defer
         receipt of their base salary and/or bonus.  Executive
         Participants may defer from 1% to 20% of base salary and from
         1% to 100% of annual incentive bonus.  The percentage of base
         salary and annual incentive bonus deferred must be the same up
         to 6%.  

    (b)  Matching Contributions. "Matching Contributions" are additional
         amounts credited to the accounts of Participants who have made
         Elective Deferrals.  The Corporation will credit the
         Participant's Account with an amount equal to 50% of the
         Participant's Elective Deferral which is not in excess of 6% of
         Compensation.

5.  Manner of Election.

    (a)  Any Executive wishing to participate in this Plan
         must file with the Administrator a written notice on
         the Notice of Election, a form of which is attached as
         Exhibit A, electing to defer payment of such person's
         Compensation as may be permitted under this Plan.  An
         election shall be effective with respect to
         Compensation earned during the first calendar year
         that commences after the date of filing of the Notice
         of Election and, except to the extent such election is
         subsequently modified or terminated as provided below,
         subsequent calendar years.

    (b)  An election may be modified by filing with the Administrator a
         new Notice of Election on or before the December 31 immediately
         preceding the calendar year for which such modification is to
         be effective.  No modification shall be effective with respect
         to Compensation earned prior to the date the modification is
         received by the Administrator or the effective date of the new
         Notice of Election, whichever is later.

    (c)  An election may be terminated by the filing with the
         Administrator of a Notice of Termination, a form of which is
         attached as Exhibit B, on or before the December 31 immediately
         preceding the first calendar year for which such termination is
         to be effective.  No termination shall be effective with
         respect to Compensation earned prior to the date the Notice of
         Termination is received by the Administrator or the effective
         date of the Notice of Termination, whichever is later.  An
         election shall terminate on the date a person ceases to be an
         Executive effective for Compensation earned on or after such
         date.  An election shall also terminate on the date an
         Executive terminates employment with the Corporation or a
         Director ceases to be a Director, as the case may be, effective
         for Compensation earned on or after such date.

    (d)  A person for whom an election is terminated may thereafter file
         a new Notice of Election for future calendar years for which
         such person is eligible to participate in this Plan.

6.  Deemed Investment of Contributions.

    The Corporation may allow each Participant to elect one or more
    deemed investment funds established by the Corporation in which
    Elective Deferrals will be deemed to be invested.  Matching
    Contributions will be deemed to be invested, on a pro rata basis, in
    the same deemed investment funds in which Elective Deferrals are
    deemed to be invested.

7.  Participant Accounts and Reports to Participants.

    (a)  The amount of any Elective Deferral and Matching Contribution
         shall be credited to an Account maintained by the Corporation
         on its books in the name of the Participant.

    (b)  The balance of the Account will be increased or decreased to
         reflect income, expenses, gains, and losses deemed attributable
         to the Account.

    (c)  The Administrator shall cause the Corporation to keep an
         accurate record of the amounts credited to the Account of each
         Participant, and as of the end of each calendar quarter shall
         deliver to each Participant a written statement of such
         Participant's Account.

8.  Vesting.

    Participants are 100% vested in Elective Deferrals and Matching
    Contributions.

9.  Participants are Unsecured Creditors.

    (a)  All rights, title and interest in the balance credited to the
         Account of a Participant shall remain at all times solely as
         the Corporation's unsecured contractual obligation under this
         Plan.  Neither a Participant nor any other person, including,
         without limitation, any Beneficiary shall have any right, title
         or interest of any kind, by reason of this Plan, in any
         investment deemed to be made on behalf of a Participant or in
         any specific assets of the Corporation, the Plan, or any trust
         other than the Corporation's unsecured and unfunded obligation
         to make the payment described in this Plan.

    (b)  Notwithstanding the provisions of Section 9(a) hereof, the
         Corporation may transfer to the trustee of one or more trusts
         established for the benefit of one or more Participants' assets
         from which all or a portion of the benefits provided under the
         Plan will be satisfied, provided that such assets held in trust
         shall at all times be subject to the claims of general
         unsecured creditors of the Corporation and no Participant shall
         at any time have a prior claim to such assets.

10. Annual Distributions.

    (a)  In each year commencing after 1997, a distribution shall be
         made to all Participants who made Elective Deferrals in the
         prior year.  Such distribution shall be equal to the maximum
         amount of elective deferrals that the Participant could have
         deferred to the 401(k) Plan in the prior year and the maximum
         amount of matching contributions that could have been credited
         to the Participant's account in the 401(k) Plan in the prior
         year.  Such distribution shall be made to the Participant no
         later than March 31 of that year.

    (b)  The balance of a Participant's Account shall be appropriately
         reduced to reflect distributions made hereunder.

11. Payment.

    (a)  Except in the case of the retirement, disability or death of a
         Participant, a distribution of such Participant's Account
         balance shall commence as of the earlier of:

          (i) to the extent practicable, in the sole discretion of the
              Administrator, the last day a Director Participant is a
              Director or an Executive Participant is an employee of the
              Corporation, but not later than the last day of the month
              following the date a Director Participant ceases to be a
              Director or an Executive Participant ceases to be an
              employee of the Corporation; or

         (ii) any date specified by such Participant on the Notice of
              Election for distribution of such Participant's Account
              (which specified date is not after the January 1 following
              the calendar year in which such Participant reaches age
              70).
 
    In the case of a distribution by reason of (i) above, such
    distribution shall be in the form of a lump sum, regardless of the
    election of the Participant on the Notice of Election.  A non-
    employee Director Participant who continues service with the
    Corporation after December 3, 1996 shall not be considered to cease
    to be a Director because of the merger of Diamond Shamrock, Inc. and
    Ultramar Corporation.

    (b)  In the event of a Participant's retirement or disability, a
         distribution of such Participant's Account balance shall
         commence as of the later of:

          (i) to the extent practicable, in the sole discretion of the
              Administrator, the last day a Director Participant is a
              Director or an Executive Participant is an employee of
              the Corporation, but not later than the last day of the
              month following the date a Director Participant ceases
              to be a Director or an Executive Participant ceases to
              be an employee of the Corporation; or

         (ii) any date specified by such Participant on the Notice of
              Election for distribution of such Participant's Account
              (which specified date is not after the January 1
              following the calendar year in which such Participant
              reaches age 70).

    In the case of distribution by reason of this Section 11(b), such
    distribution shall be in the form elected by the Participant on
    the Notice of Election.  A non-employee Director Participant who
    continues service with the Corporation after December 3, 1996
    shall not be considered to cease to be a Director because of the
    merger of Diamond Shamrock, Inc. and Ultramar Corporation.

    (c)  In the event of a Participant's employment or services as a
         Director are terminated following a Change in Control, the
         Participant's Account shall be distributed in a lump sum to
         the Participant withing sixty (60) days of such termination.

    (d)  In the event of a Participant's death, the balance of the
         Account shall be distributed in a lump sum to the Beneficiary
         designated pursuant to Section 12 below.  The lump sum
         payment shall be paid as of the last day of the month
         following the Participant's date of death.

    (e)  Distributions from the Plan will be made in the form of cash. 
         Distributions will be made to the Participant or, in the
         event of such Participant's death, to the designated
         Beneficiary, in accordance with the Participant's election
           and Section 12 below.

    (f)  On each date for an installment distribution, there shall be
         distributed to the Participant an amount equal to the sum of
         the balance then credited to such Participant's Account
         multiplied by a fraction, the numerator of which is one and
         the denominator of which is the number of remaining
         installments.

    (g)  Notwithstanding the provisions of Sections 11(a), (b), (c),
         (d) and (e) hereof, the person or group designated in clause
         (i), (ii) or (iii), below, as appropriate, in its absolute
         discretion exercised in good faith, may accelerate the rate
         of distribution but only in the case of unanticipated severe
         financial hardship caused by circumstances over which the
         Participant has no control, and only to the extent necessary
         to alleviate such financial hardship.

           (i)  In the case of a Director Participant, an ad hoc
                committee of the Board consisting of those members of
                the Compensation Committee of the Board who are not
                Participants in the Plan.  If all the members of the
                Compensation Committee participate in the Plan, such
                decision shall be made by the Board; however, no member
                of the Board shall participate in any such decision
                affecting uniquely such member as a Participant.

          (ii)  In the case of an Executive Participant, the
                Administrator.

         (iii)  Notwithstanding clause (i) or (ii), above, if one or
                more trusts have been established pursuant to Section 9
                (b) hereof, to the extent assets in such trust or trusts
                are available therefor, the trustee of the trust.

    (h)  The balance of a Participant's Account shall be appropriately
         reduced in accordance with this Section 11 to reflect
         distributions made hereunder.

    (i)  Any election with respect to the distribution of Compensation
         deferred for a given period pursuant to this Plan shall be
         irrevocable.

    (j)  The balance of a Participant's Account may be reduced by the
         amount of any indebtedness of such Participant to the
         Corporation at the time of distribution.  Failure to reduce any
         payment to a Participant will not constitute waiver of the
         Corporation's claim for such indebtedness.

    (k)  Notwithstanding the foregoing provisions of this Section 11,
         the Corporation shall make provision for the withholding of any
         Federal taxes that may be required to be withheld by the
         Corporation in connection with the payments due hereunder.

12. Beneficiary Designation.

    A Participant may designate in writing any person or persons to whom
    payments are to be made if the Participant dies before receiving
    payment of all amounts due under this Plan and the proportion or
    proportions in which distributions are to be made to each such
    person, using the Notice of Beneficiary Designation, a form of which
    is attached as Exhibit C, or some other method of designation which
    provides Beneficiary designation information similar to that in such
    Notice of Beneficiary Designation.  A Participant may designate a
    Beneficiary other than a spouse only if the spouse consents in
    writing as witnessed by a notary public.  A Beneficiary designation
    will be effective only after the Notice of Beneficiary Designation
    or other designation is filed with and accepted by the Administrator
    while the Participant is alive and, to the extent indicated by the
    Participant in the Notice of Beneficiary Designation or other
    designation, will cancel all beneficiary designations signed and
    filed earlier by such Participant.  Any such designation may be
    terminated or modified from time to time by the Participant.  If
    and to the extent that a Participant fails to designate a
    Beneficiary or if all of the Beneficiaries of the Participant die
    before the death of the Participant or before complete payment of
    all amounts credited to the Participant's Account under this Plan,
    the remaining unpaid amount shall be paid in one lump sum to the
    estate of the last to die of the Participant or the Participant's
    Beneficiaries.

13. Administration of the Plan.

    (a)  Except as provided in Section 11(f), full power and authority
         to construe, interpret and administer this Plan shall be vested
         in the Administrator, who may from time to time adopt any rules
         or regulations the Administrator determines are necessary or
         appropriate.  If there is no Administrator, the power and
         authority of the Administrator shall rest with Board; however,
         no member of the Board shall participate in any decision
         affecting uniquely such member as a Participant.  Decisions of
         the Administrator, the ad hoc committee described in Section
         11(f) and the Board made in good faith, shall be final,
         conclusive and binding upon all parties.

    (b)  In the absence of bad faith or gross neglect of duty, neither
         the Administrator nor any member of the Benefit Review
         Committee, Compensation Committee, or Board of Directors shall
         have any liability to the Corporation or to any other person,
         firm or corporation arising out of or connected with the
         administration of this Plan for any decision made respecting
         this Plan or its administration.

    (c)  The President, Chairman of the Board and Chief Executive
         Officer of the Corporation shall appoint a Benefit Review
         Committee consisting of not less than three nor more than five
         persons, having the administrative responsibilities and
         discretionary authority described in this Section 13.  The
         Benefit Review committee has full power and authority to
         construe the Plan and determine all questions of eligibility
         and interpretation under the Plan, except with respect to non-
         employee Directors, in which case the Compensation Committee of
         the Board of Directors has full power and authority to construe
         the Plan and determine all questions of eligibility and
         interpretation under the Plan.  The determination of the
         Compensation Committee shall be final and binding, and not
         subject to Subsection (d), below.

    (d)  The Plan and any claims of all Participants, with the sole
         exception of non-employee Directors, arising from the Plan or
         in any way related to the Plan, are subject to and governed by
         the Ultramar Diamond Shamrock Corporation Dialogue Dispute
         Resolution Program ("Dialogue").  If a claim has been appealed
         from the Administrator to the benefit review committee and the
         claimant desires to appeal the decision of the Benefit Review
         Committee, such appeal must be conducted solely within the
         limitations and procedures of Dialogue.

14. Amendment or Discontinuance of Plan.

    At the sole discretion of the Board this Plan may be discontinued or
    changed at any time.  Upon such discontinuance, the vested amounts
    credited to the Account of any Participant shall be distributed in
    satisfaction of the obligations of the Corporation under this Plan,
    in the manner selected at the option of the Board or at the option
    of the Administrator  if so directed by the Board, as follows:

    (a)  The Account balance may be distributed in a lump sum as of the
         date of discontinuance in a manner consistent with Section 11
         hereof.  The lump sum payment shall be made on the last day of
         the month following the date of discontinuance; or

    (b)  The Account balance may be distributed in accordance with the
         Notice of Election; or

    (c)  Commencing on the last day of the month following the date of
         discontinuance, the Account balance may be distributed in no
         more than ten annual installments, calculated in the same
         manner as payments under Section 11(e).

    Notwithstanding the foregoing provisions of this Section 14, the
    Board may make any change in this Plan that, under all the
    circumstances, is beneficial and equitable to the Participants and
    is consistent with the spirit and purposes of this Plan or is
    required to protect the tax-deferred status of the Plan.  However,
    no member of the Board who is a Participant in the Plan shall
    participate in any such decision affecting uniquely such member as a
    Participant.

    The Plan is intended to provide benefits for "management or highly
    compensated" employees within the meaning of Sections 201, 301 and
    401 of ERISA, and therefore to be exempt from the provisions of
    Parts 2, 3 and 4 of Title I of ERISA.  Accordingly, the Plan shall
    terminate and no further benefit shall accrue hereunder in the event
    it is determined by a court of competent jurisdiction or by an
    opinion of counsel to the Corporation that such balance of the Plan
    constitutes an employee pension benefit plan within the meaning of
    Section 3(2) of ERISA, which is not so exempt.  In addition, in the
    absolute discretion of the Board, the vested benefit of each
    Participant accrued under such balance of the Plan on the date of
    termination shall be paid immediately to such Participant in a lump
    sum.  Alternatively, the Plan shall refund Elective Deferrals and
    earnings in a lump sum if legislative changes require refunds to
    protect the tax-deferred status of the Plan.

15. Miscellaneous.

    (a)  Except insofar as permitted by applicable law, no sale,
         transfer, alienation, assignment, pledge, collateralization or
         attachment of any benefits under the Plan shall be valid or
         recognized by the Corporation.  The Participant, his spouse and
         his designated Beneficiary shall not have any power to
         hypothecate, mortgage, commute, modify or otherwise encumber in
         advance of any of the benefits payable hereunder, nor shall any
         of said benefits be subject to seizure for the payment of any
         debts, judgements, alimony, maintenance owed by the Participant
         or his or her Beneficiary, or be transferable by operation of
         law in the event of bankruptcy, insolvency, or otherwise. 
         Notwithstanding the foregoing, the Corporation may, if the
         Committee so determines in its sole discretion, follow the
         terms of any court order issued in connection with any domestic
         relations proceeding including but not limited to marital
         dissolution or child support.

    (b)  The Plan shall be binding upon the Corporation, its assigns,
         and any successor company which shall succeed to substantially
         all of its assets and business through merger, acquisition or
         consolidation, and upon a Participant, his Beneficiary,
         assigns, heirs, executors and administrators.

    (c)  The terms and conditions of the Plan shall not be deemed to
         constitute a contract or employment between the Corporation and
         a Participant.  Nothing in this Plan shall of itself be deemed
         to give a Participant the right to be retained in the service
         of the Corporation or to interfere with any right of the
         Corporation to discipline or discharge the Participant at any
         time.

    (d)  A Participant shall cooperate by furnishing any and all
         information reasonably requested by the Corporation, the Board
         or the Administrator, and take such other actions as may be
         requested in order to facilitate the administration of the Plan
         and the payment of benefits hereunder.

    (e)  In case any provision of this Plan shall be found illegal or
         invalid for any reason, said illegality or invalidity shall not
         affect the remaining parts hereof, but the Plan shall be
         construed and enforced as if such illegal and invalid provision
         had never been included herein.

    (f)  Any Notice which shall be or may be given under the Plan shall
         be in writing and shall be mailed by United States mail,
         postage prepaid.  If Notice is to be given to the Corporation
         (or the Board or the Administrator), such Notice shall be
         addressed to the Corporation at P.O. Box 696000, San Antonio,
         Texas 78269-6000, Attention: Vice President, Human Resources;
         if Notice to a Participant, addressed to the last known address
         on the Corporation's personnel records.  Any Notice or filing
         required or permitted to be given to a Participant under this
         Plan shall be sufficient if in writing and hand-delivered, or
         sent by mail, to the last known address of the Participant. 
         Any party may, from time to time, change the address to which
         notices shall be mailed by giving written Notice of such new
         address.

    (g)  The interest in the benefits hereunder of a spouse of a
         Participant who has predeceased the Participant shall
         automatically pass to the Participant and shall not be
         transferable by such spouse in any manner, including but not
         limited to such spouse's will, nor shall such interest pass
         under the laws of intestate succession.

    (h)  The benefits provided for a Participant and Participant's
         Beneficiary under the Plan are in addition to any other
         benefits available to such Participant under any other plan or
         program for employees of the Corporation.  The Plan shall
         supplement and shall not supersede, modify or amend any other
         such plan or program except as may otherwise be expressly
         provided herein.

    (i)  The payment of benefits under the Plan to a Participant or
         Beneficiary shall fully and completely discharge the
         Corporation and the Board from all further obligations under
         this Plan with respect to the portion of the benefits so paid.

    (j)  If any action at law or in equity is necessary by a Participant
         or Beneficiary to enforce the terms of the Plan, the
         Participant or Beneficiary shall be entitled to recover
         reasonable attorney's fees, costs and necessary disbursements
         in addition to any other relief to which that party may be
         entitled.

    (k)   (i)  Unless the context clearly indicates otherwise, (A)
               masculine pronouns shall include the feminine and
               singular words shall include the plural and vice versa;
               (B) any reference to a section of the Code or ERISA, any
               regulation promulgated under the Code or ERISA or any
               plan (except this Plan) shall refer also to any
               successor provision to such section, and (C) any
               reference to a plan shall refer also to such plan as
               amended from time to time.

         (ii)  Titles and headings of the articles and sections of the
               Plan are included for ease of reference only and are not
               to be used for the purpose of construing any portion or
               provision of the Plan document.

    (l)  This instrument and any Notice may be executed in one or more
         counterparts, each of which is legally binding and enforceable.

    (m)  Except to the extent other instruments are incorporated herein
         by reference or there are amendments made to this Plan in
         the manner specified by Article 13 hereof, this instrument
         constitutes the entire Plan.

16. Governing the Law.

    To the extent not preempted by Federal law, the provisions of this
    Plan shall be interpreted and construed in accordance with the laws
    of the State of Texas.

17. Effective Date.

    The effective date for this Plan shall be January 1, 1997.

                                  Ultramar Diamond Shamrock Corporation


                                 By:   /s/  Timothy J. Fretthold
                                       Executive Vice President

<PAGE>
Name
      (Print)

                                Exhibit A

                         Notice of Election for
     Ultramar Diamond Shamrock Corporation Nonqualified 401(k) Plan

1.  Pursuant to the provisions of the Plan, I elect to have compensation
    payable to me for services to Ultramar Diamond Shamrock Corporation
    deferred in the manner specified below.  I understand that this
    election shall be irrevocable as to compensation earned by me
    following the filing and effectiveness of this election, except to
    the extent I file a subsequent Notice of Election or Notice of
    Termination with the Administrator applicable to compensation earned 
    by me in a calendar year subsequent to such filing.

    I also understand that no modification or termination shall be
    effective with respect to compensation deferred prior to the
    calendar year following the date any subsequent Notice of Election
    or Notice of Termination is received by the Administrator.

2.  Percentage of compensation deferred (Retirement Account).

      % of Compensation-Base Salary and Annual Incentive Bonus (minimum
    amount is 1% and maximum amount is 20%).

    The percentage of Base Salary and Annual Incentive Bonus deferred
    must be the same up to 6%.  If you defer at least 6% of your total
    compensation and wish to defer a greater percentage of Annual
    Incentive Bonus than of Base Salary, please note this percentage
    below:

      % of Annual Incentive Bonus (total amount, including percent
    deferred above; maximum amount is 100%).

3.  Percentage of compensation deferred (Fixed Account).

      % of Compensation-Base Salary and Annual Incentive Bonus (minimum
    amount is 1% and maximum amount for Retirement and Fixed Accounts
    combined is 20%).

      % of Annual Incentive Bonus (total amount, including percent
    deferred above;  maximum amount is 100%).

4.  Annual Distributions

    (a)   Defer to the 401(k) Plan the distribution from the 
       Nonqualified Plan equal to the maximum amount of elective
       deferrals and matching contributions that could have been
       credited to the 401(k) Plan in the prior year.  I understand that
       this distribution will not be included in my gross income in the
       prior year.
     
    (b)   Distribute to me in cash the distribution from the
       Nonqualified Plan equal to the maximum amount of elective
       deferrals and matching contributions that could have been
       credited to the 401(k) Plan in the prior year.  I understand that 
       this amount will be included in my gross income in the prior
       year.

5.  Deemed Investment Funds

        % Ultramar Diamond Shamrock           % Fidelity Advisor Income
        Corporation Common Stock              and Growth Fund
        Fund

        % CIGNA Guaranteed Long Term          % Fidelity Advisor 
        Fund (1)                              Strategic Opportunities
                                              Fund

        % Fidelity Advisor Growth             %Warburg Pincus Advisor 
        Opportunities Account                 Emerging Growth Fund

        % Vanguard S&P 500 Index              % Warburg Pincus Advisor   
        Fund (2)                              International Equity Fund

        % INVESCO Industrial Income Fund      % Twentieth Century Ultra
                                              Fund

(1)  Any funds in this account which may be transferred to the Ultramar
     Diamond Shamrock Corporation 401(k) Retirement Savings Plan will
     initially be deposited in the CIGNA Fixed Income Account.

(2)  Any funds in this account which may be transferred to the Ultramar
     Diamond Shamrock Corporation 401(k) Retirement Savings Plan will
     initially be deposited in the CIGNA Stock Market Index Account.

6.  Date of commencement of Retirement Account payments.

    Except in the case of retirement, disability or death of a
    Participant, distribution will be made,  pursuant to Section 11(a)
    of the Plan, on the earlier of:

    (a)  the date an Executive Participant ceases to be an employee of
         the Corporation, or

    (b)  the commencement date specified below (select one):

             retirement.

             the January 1 following the calendar year in which I
             retire.

             the January 1 following the calendar year in which I reach
             age 70.

             the following date (which shall in no event be after the
             January 1 following the calendar year in which I reach age
             70)               .


    In the event of a Participant's retirement or disability,
    distribution will commence, pursuant to Section 11(b) of the Plan,
    on the later of (a) the date an Executive Participant ceases to be
    an employee of the Corporation or (b) the date selected above.

7.  Method of Retirement Account payment (select one) (see Note 2 at end
    of Notice).

        Lump sum, or

        Annual installments over a period of     years (not over ten).

8.  Date of commencement of Fixed Account lump sum payment.

Except in the case of retirement, disability or death of a Participant,
distribution will be made, pursuant to Section 11(a) of the Plan, on the
earlier of:

    (a)  the date an Executive Participant ceases to be an employee of
         the Corporation, or

    (b)  the following date (which shall in no event be after the
         January 1 following the calendar year in which I reach age 70)
                        .

In the event of a Participant's retirement or disability, distribution
will commence, pursuant to Section 11(b) of the Plan, on the later of
(a) the date an Executive Participant ceases to be an employee of the
Corporation or (b) the date selected above.

                       Notes to Notice of Election

1.  Participants should be aware that a deferral may reduce the benefit
    payable under the Ultramar Diamond Shamrock Corporation Career
    Average Retirement Income Plan (the "CARIP") and the Ultramar
    Diamond Shamrock Corporation Employee Stock Ownership Plan I (the
    "ESOP I") and the Ultramar Diamond Shamrock Corporation Employee
    Stock Ownership Plan II (the "ESOP II").  Any amount deferred to a
    date following termination of employment will not be taken into
    account for purposes of computing the CARIP, ESOP I, and the ESOP II
    qualified pension benefits.  As a result, the CARIP, ESOP I, and
    ESOP II qualified pension benefits will be less than if the deferral
    had been paid prior to the Participant's termination of employment. 
    Such "lost" benefits will be paid pursuant to the Ultramar Diamond
    Shamrock Corporation Excess Benefits Plan.  Amounts paid pursuant to
    the Excess Benefits Plan are not adjusted for the loss of any tax
    benefits which would have been realized had such benefits been paid
    under a qualified plan.

2.  All distributions under the Plan represent taxable income to the
    Participant and may not be rolled over to an Individual Retirement
    Account.

3.  Participants who no longer qualify as highly compensated employees
    as defined in the 401(k) Plan will no longer be eligible to make
    Elective Deferrals to this Plan.



Date                              Signature


Date Notice of Election received by the Administrator:



Date                              Signature


<PAGE>
Name
    (Print)
                                EXHIBIT B

                          Notice of Termination
                                   for
      Ultramar Diamond Shamrock Corporation Nonqualified 401(k) Plan

Pursuant to the provisions of the Plan, I hereby terminate my
participation in the Plan effective as of January 1, 19   .



Date                             Signature 


Date Notice of Termination received by the Administrator:



Date                             Signature
                                            Administrator

Name
          (Print)
                                Exhibit C

                    Notice of Beneficiary Designation
                                   for
Ultramar Diamond Shamrock Corporation Nonqualified 401(k) Plan (the
"Plan")

Any amounts credited to my account under the Plan unpaid at my death
shall be paid to the following beneficiary or beneficiaries, in the
proportions designated:


                                        %
Name                          Proportion      Relationship


Address



Name                          Proportion      Relationship


Address


This designation supersedes any previous beneficiary designation made by
me with respect to the amounts credited to my account under the Plan.  I
hereby reserve the right to terminate or modify any designation made by
this Instrument, at any time or from time to time.


                               Participant's
Date                                    Signature



                               Witness'
Date                                    Signature 
<PAGE>
A Participant may designate a Beneficiary other than a spouse only if
the spouse consents in writing as witnessed by a notary public.


                              Spousal Waiver


I understand that my signature below acknowledges my full consent to the
above beneficiary designation which limits my claim to any benefits from
the Ultramar Diamond Shamrock Corporation Nonqualified 401(k) Plan in
the event of the death of my spouse, and my signature is notarized
below.



                                     Spouse's
Date                                       Signature 



                    Notarization of Spouse's Signature


The State of 

County of


Subscribed and Sworn to me this     day of               , 19   .



Seal                                Signature
                                              Notary Public
                                    My commission expires


Date Notice of Designation received by the Administrator:



Date                                Signature 
                                              Administrator



Note:  Other methods of beneficiary designation which provide
       beneficiary designation information similar to that in this
       Instrument may be used instead of this Instrument.

May 22, 1997


Ultramar Diamond Shamrock Corporation
9830 Colonnade Boulevard
San Antonio, Texas 78230

Re:  Ultramar Diamond Shamrock Corporation Nonqualified 401(k) Plan

Gentlemen:

I am Counsel for Ultramar Diamond Shamrock Corporation, a Delaware
corporation (the "Company").  The Company expects to file with the
Securities and Exchange Commission on or about May 22, 1997 under
the Securities Act of 1933, as amended, a Registration Statement on
Form S-8 (the "Registration Statement") for the purpose of registering
101,015 shares of common stock, $0.01 par value of the Company ("Common
Stock").

In connection with such filing, I have examined the Plan and such
other documents, records and matters of law as I have deemed necessary
for purposes of this opinion and based thereupon, I am of the opinion
that the shares of Common Stock that may be issued and sold or delivered
pursuant to the Plan will be, when issued in accordance with the provisions
of the Plan, legally issued, fully paid an nonassessable and the rights to
purchase Common Stock (the "Rights") in accordance with the Rights
Agreement dated June 25, 1992 between the Company and Registrar and
Transfer Company, when duly issued, will be legally issued.

I hereby consent to the filing of this opinion as an exhibit  to
the Registration Statement on Form S-8 for the Plan filed by the
Company with the Securities and Exchange Commission to effect 
registration of such Common Stock under the Securities Act of 1933, 
as amended.

Very truly yours,


/s/  Todd Walker
     TODD WALKER


w3303.lw

                                                            Exhibit 23.1

                    Consent of Independent Accountants



We hereby consent to the incorporation by reference in this Registration
Statement on Form S-8 of our report dated February 7, 1997 with respect to
the consolidated financial statements and financial statement schedule of
the Diamond Shamrock operations of Ultramar Diamond Shamrock Corporation
included in Ultramar Diamond Shamrock Corporation's Annual Report on Form
10-K for the year ended December 31, 1996.  We also consent to the
references to us under the heading "Experts" in such Registration
Statement.  



/s/ PRICE WATERHOUSE LLP
    PRICE WATERHOUSE LLP


San Antonio
May 22, 1997




w3285a.LW

                   Consent of Independent Accountants



We consent to the reference to our firm under the caption "Experts" in the
Registration Statement (Form S-8) pertaining to the Ultramar Diamond
Shamrock Corporation Nonqualified 401(k)Plan and to the incorporation by
reference therein of our report dated February 7, 1997 with respect to the
consolidated financial statements and schedule of Ultramar Diamond Shamrock
Corporation (formerly Ultramar Corporation) included in its Annual Report
(Form 10-K) for the year ended December 31, 1996, filed with Securities and
Exchange Commission.


                                           /s/ ERNST & YOUNG LLP
                                               ERNST & YOUNG LLP




San Antonio
May 22, 1997




w3316.LW

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ R. R. HEMMINGHAUS
    R. R. Hemminghaus


Dated: April 23, 1997
</PAGE>

<PAGE>

                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ H. PETE SMITH
    H. Pete Smith


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ BYRON ALLUMBAUGH
    Byron Allumbaugh


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ E. GLENN BIGGS
    E. Glenn Biggs


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ W. E. BRADFORD
    W. E. Bradford


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ H. FREDERICK CHRISTIE
    H. Frederick Christie


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ W. H. CLARK
    W. H. Clark


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ JEAN GAULIN
    Jean Gaulin


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ RUSSEL H. HERMAN
    Russel H. Herman


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ BOB MARBUT
    Bob Marbut


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ KATHERINE D. ORTEGA
    Katherine D. Ortega


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.


/s/ MADELEINE SAINT-JACQUES
    Madeleine Saint-Jacques


Dated: April 23, 1997

</PAGE>

<PAGE>
                        POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby
constitutes and appoints Patrick J. Guarino, Curtis V. Anastasio,
Harold D. Mallory, and Todd Walker, and each of them, his true and
lawful attorney or attorneys-in-fact, with full power of
substitution and revocation, for him and in his name, place, and
stead, in any and all capacities (including as an officer or
director of ULTRAMAR DIAMOND SHAMROCK CORPORATION (the
"Corporation"), to sign Registration Statements on Form S-8 of the
Corporation for the purposes of registering, pursuant to the
Securities Act of 1933:  (1) 100,000 shares of Common Stock (and
associated stock purchase rights) in accordance with the terms of
the Corporation's Non-Employee Director Equity Plan, (2) 77,458
shares of Common Stock (and associated stock purchase rights) in
accordance with the terms of the Corporation's 401(k) Retirement
Savings Plan (and as a result of the merger between Diamond
Shamrock, Inc. and Ultramar Corporation), and (3) 101,015 shares of
Common Stock (and associated stock purchase rights)in accordance
with the terms of the Corporation's Nonqualified 401(k) Plan (and
as a result of the merger between Diamond Shamrock, Inc. and
Ultramar Corporation), and to sign any or all amendments and any or
all post-effective amendments to such Registration Statements, and
to file the same, with all exhibits thereto, and other documents in
connection therewith, with the Securities and Exchange Commission
granting unto said attorney or attorneys-in-fact, and each of them,
full power and authority to do and perform each and every act and
thing requisite and necessary to be done in and about the premises,
as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorney or
attorneys-in-fact or any of them or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.




/s/ C. BARRY SCHAEFER
    C. Barry Schaefer


Dated: April 23, 1997

</PAGE>


                           CERTIFICATE
              ULTRAMAR DIAMOND SHAMROCK CORPORATION


     I, Harold D. Mallory, Assistant Secretary of ULTRAMAR DIAMOND SHAMROCK
CORPORATION, a Delaware corporation, and custodian of the books and records
of said corporation, do hereby certify that the following resolutions were
duly adopted by the Board of Directors of said corporation on April 23,
1997, and that said resolutions are in full force in effect.

     RESOLVED that the appropriate officers of the Corporation be, and
     hereby they are, authorized and directed on behalf of the Corporation
     to prepare, execute and file with the Securities and Exchange
     Commission a Registration Statement on Form S-8 for the registration
     under the Securities Act of 1933, as amended (the "1933 Act"), of the
     number of shares of Common Stock (the "Shares") of the Corporation
     available for issuance or transfer pursuant to each of the 401(k)
     Retirement Savings Plan and the Nonqualified 401(k) Plan, and to file 
     such amendments thereto as may, in the opinion of the officers
     executing the same on behalf of the Corporation, be necessary or
     proper to effect the registration of such Shares under the 1933 Act,
     and to cause to be filed with the Securities and Exchange Commission
     all such post-effective amendments, additional papers, prospectuses,
     undertakings and documents as may be necessary or advisable in order
     to make such registration statement effective, to comply with the
     provisions of the 1933 Act, and to comply with any undertakings of the
     Corporation made in connection with such registration.  

     RESOLVED that  Patrick J. Guarino, Curtis V. Anastasio, Harold D.
     Mallory, and Todd Walker, or any of them, be and hereby are
     designated to act on behalf of the Corporation as its agent or agents
     for service in respect of matters concerning the Registration
     Statements relating to the Shares with the powers enumerated in Rule
     487 of the Rules and Regulations of the Securities and Exchange
     Commission.  

     RESOLVED that the name of any officer or director of the Corporation
     signing the Registration Statements (and any amendments thereto) on
     its behalf may be signed pursuant to a power of attorney duly executed
     and delivered by the officer or director whose name is so signed.  

     RESOLVED that the proper officers and employees of the Corporation be,
     and hereby they are, authorized and directed in the name and on behalf
     of the Corporation to take any and all action which they in their
     discretion may deem necessary or advisable in order to register or
     qualify the Shares, or any number thereof, issued pursuant to such
     401(k) Retirement Savings Plan and such Nonqualified 401(k) Plan, for
     issuance and sale under the securities laws of any of the states of
     the United States of America, or to take any and all other action
     which they in their discretion may deem necessary or advisable in
     order to register or license the Corporation as a dealer or broker in
     securities in any such state or to secure permission for the
     Corporation to issue such Shares pursuant to such 401(k) Retirement
     Savings Plan and Nonqualified 401(k) Plan and in connection with such
     applications, registrations or qualifications to execute, acknowledge,
     verify, deliver, file and publish all such applications, reports,
     issuance, covenants, certified copies of resolution, powers of
     attorney, consents to service of process and any and all other papers
     or instruments as may be required under the laws of any such state,
     and to take any and all other action which they deem necessary or
     advisable in order to maintain such registration or qualification for
     as long as they deem to be in the best interest of the Corporation or
     in order to cancel such registration or qualification if and when they
     deem such cancellation to be in the best interest of the Corporation. 

     RESOLVED that if, in any state in which any application, statement,
     notice or other instrument is required for the purpose of registering
     or qualifying the Shares issued pursuant to the 401(k) Retirement
     Savings Plan and the Nonqualified 401(k) Plan for offering or sale or
     to register or license the Corporation as a dealer or broker in
     securities, a prescribed form of resolution or resolutions relating
     to such offering or sale or to any application, statement, notice or
     other instrument in connection is required, each such preamble and
     resolution shall be deemed to have been, and hereby is, adopted by
     this Board of Directors and the Secretary of the Corporation is hereby
     authorized and directed to certify any such preamble or resolution as
     though the same were now presented to this meeting, all such preambles
     and resolutions to be inserted in the Minute Book following the
     minutes of this meeting.  

     RESOLVED that the appropriate officers of the Corporation be, and
     hereby they are, authorized and directed to prepare, execute and file
     with the New York Stock Exchange listing applications, listing fee
     agreements and listing agreements with respect to the listing on such
     exchange, upon official notice of issuance of the Shares issued from
     time to time under and pursuant to the provisions of the 401(k)
     Retirement Savings Plan and the Nonqualified 401(k) Plan, and the
     proper officers of the Corporation be, and hereby they are, authorized
     and empowered to cause such listing applications to be amended and
     modified to the extent that the officers executing the same may deem
     necessary or proper and to cause to be filed with such exchange, all
     additional papers, undertakings, agreements and documents as may be
     necessary or advisable in order to cause such exchange to list those
     Shares.  

     RESOLVED that  Patrick J. Guarino, Curtis V. Anastasio, Harold D.
     Mallory, and Todd Walker, and any of them be, and hereby they are,
     authorized to appear if necessary or advisable before officials of
     such exchange, with authority to make changes in the listing
     applications relating to the Shares to be issued under and pursuant
     to the provisions of the 401(k) Retirement Savings Plan and the
     Nonqualified 401(k) Plan and take such steps as may be necessary to
     effect the listing of the Shares on such exchange.  

     RESOLVED that the Corporation's Transfer Agent be, and hereby it is
     duly authorized to either (a) issue or (b) transfer from the
     Corporation's treasury as may be authorized in the manner provided
     below, and that the Corporation's Registrar be and hereby it is duly
     authorized to register certificates of Common Stock of this
     Corporation issued or transferred from the Corporation's treasury
     pursuant to the terms of the 401(k) Retirement Savings Plan and the
     Nonqualified 401(k) Plan, upon written certification and authorization
     by the Chief Executive Officer, Chief Operating Officer and President,
     any Vice President, the Secretary, or Assistant Secretary of the
     Corporation that Shares were issued thereunder to each director or
     employee designated in such certification, that each such director or
     employee is entitled to receive the number of shares specified in such
     certification and that shares of Common Stock therefore are to be
     either issued or transferred from the Corporation's treasury, as the
     case may be. 

     RESOLVED that the appropriate officers and employees of the
     Corporation be, and hereby they are, authorized and directed to take
     any and all further action and do any and all other things that may
     be necessary, proper or advisable to effectuate the foregoing
     resolutions.

     RESOLVED that such further specific resolutions as may be required in
     connection with the  registration and listing of Shares as
     contemplated above be, and hereby they are, deemed adopted and such
     resolutions may be certified by the Secretary of the Corporation as
     having been adopted by the Board of Directors provided that a copy
     thereof is inserted in the Minute Book following the minutes of this
     meeting.


     IN WITNESS WHEREOF, I have set my hand and the seal of this
corporation upon this 22nd day of May, 1997.



                              /s/ HAROLD D. MALLORY
                                  Harold D. Mallory




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