Under section 633 of the Foreign Assistance Act of 1961, 75 Stat. 454 (22 U.S.C. 2933), as amended; Executive Order 11223, dated May 12, 1965, as amended; and Executive Order 12163, dated September 29, 1979, as amended, the Administrator of the U.S. Agency for International Development has authority to provide extraordinary contractual relief.