Section, added Pub. L. 89–358, § 2, Mar. 3, 1966, 80 Stat. 16, § 1673; amended Pub. L. 90–77, title III, §§ 302(a), 303 (a), Aug. 31, 1967, 81 Stat. 185; Pub. L. 91–219, title II, § 202, Mar. 26, 1970, 84 Stat. 78; Pub. L. 92–540, title IV, § 401(2), Oct. 24, 1972, 86 Stat. 1090; Pub. L. 93–508, title II, § 203, Dec. 3, 1974, 88 Stat. 1582; Pub. L. 94–502, title II, §§ 205, 211 (7), Oct. 15, 1976, 90 Stat. 2387, 2388; Pub. L. 95–202, title III, § 305(a)(2), Nov. 23, 1977, 91 Stat. 1443; Pub. L. 96–466, title III, §§ 303–305, Oct. 17, 1980, 94 Stat. 2192, 2193; Pub. L. 97–35, title XX, § 2003(b)(2), Aug. 13, 1981, 95 Stat. 782; Pub. L. 97–295, § 4(40), Oct. 12, 1982, 96 Stat. 1308; Pub. L. 97–306, title II, §§ 202(a), 203 (a), Oct. 14, 1982, 96 Stat. 1433; Pub. L. 98–525, title VII, § 703(b), Oct. 19, 1984, 98 Stat. 2564; Pub. L. 100–689, title I, § 111(a)(9), Nov. 18, 1988, 102 Stat. 4172; Pub. L. 101–237, title IV, § 423(b)(1), Dec. 18, 1989, 103 Stat. 2092; renumbered § 3473 and amended Pub. L. 102–83, § 5(a), (c)(1), Aug. 6, 1991, 105 Stat. 406, related to disapproval of enrollment in certain courses.