SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Company
has duly  caused  this  report  to be signed  on its  behalf by the  undersigned
thereunto duly authorized.

ULTRAMAR DIAMOND SHAMROCK CORPORATION

By:  /s/ H. Pete Smith
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         H. PETE SMITH
         EXECUTIVE VICE PRESIDENT
         AND CHIEF FINANCIAL OFFICER
         August 1, 2000