Section, Pub. L. 87–195, pt. II, § 513, as added Pub. L. 92–226, pt. II, § 201(f), Feb. 7, 1972, 86 Stat. 25; amended Pub. L. 93–189, § 12(b)(6), Dec. 17, 1973, 87 Stat. 722; Pub. L. 93–559, § 12, Dec. 30, 1974, 88 Stat. 1798, prohibited military assistance to Thailand, Laos, and South Vietnam after June 30, 1972, 1974, and 1976, respectively, without prior authorization.