1 EXHIBIT 10.3 EIGHTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT This Eighth Amendment to Amended and Restated Credit Agreement (this "Amendment") dated as of March 31, 1999 is among COSTILLA ENERGY, INC., a Delaware corporation (the...Credit Agreement • May 17th, 1999 • Costilla Energy Inc • Crude petroleum & natural gas • New York
1 EXHIBIT 10.2 SEVENTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT This Seventh Amendment to Amended and Restated Credit Agreement (this "Amendment") dated as of March 9, 1999 is among COSTILLA ENERGY, INC., a Delaware corporation (the...Credit Agreement • May 17th, 1999 • Costilla Energy Inc • Crude petroleum & natural gas • New York
1 EXHIBIT 10.1 EXECUTION COPY PURCHASE AND SALE AGREEMENT This Purchase and Sale Agreement is dated April 1, 1999 (the "Execution Date") and is by and among PIONEER NATURAL RESOURCES USA, INC. ("Pioneer USA"), PIONEER RESOURCES PRODUCING, L.P....Purchase and Sale Agreement • May 17th, 1999 • Costilla Energy Inc • Crude petroleum & natural gas • Texas
1 EXHIBIT 10.4 PURCHASE AND SALE AGREEMENTPurchase and Sale Agreement • May 17th, 1999 • Costilla Energy Inc • Crude petroleum & natural gas • Colorado
