Exhibit 1 SOUTHERN PERU COPPER CORPORATION REGISTRATION RIGHTS AGREEMENT Dated as of March 31, 2005 TABLE OF CONTENTS This Table of Contents is not part of the Agreement to which it is attached but is inserted for convenience only.Registration Rights Agreement • April 18th, 2005 • Cerro Trading Co Inc • Metal mining • New York
Contract2 Joint Filing Agreement • April 18th, 2005 • Cerro Trading Co Inc • Metal mining
Cerro Trading Company, Inc. (“Cerro”) and SPC Investors, LLC (“SPC Investors”) hereby agree that the Amendment No. 6 to Schedule 13D to which this Joint Filing Agreement is attached as an exhibit is filed with the Securities and Exchange Commission on behalf of each of Cerro and SPC Investors.
