Section, Pub. L. 87–195, pt. I, § 121, as added Pub. L. 95–88, title I, § 115(3), Aug. 3, 1977, 91 Stat. 539; amended Pub. L. 96–53, title I, § 108, Aug. 14, 1979, 93 Stat. 363; Pub. L. 96–533, title III, § 306, Dec. 16, 1980, 94 Stat. 3147; Pub. L. 97–113, title III, § 308, Dec. 29, 1981, 95 Stat. 1535; Pub. L. 99–83, title VIII, § 809, Aug. 8, 1985, 99 Stat. 263, related to Sahel development program.