Section, act July 1, 1944, ch. 373, title III, § 312, formerly § 306, as added Aug. 2, 1956, ch. 871, title I, § 101,
70 Stat. 923; amended July 23, 1959,
Pub. L. 86–105, § 1,
73 Stat. 239; Sept 8, 1960,
Pub. L. 86–720, § 1(b),
74 Stat. 820; Aug. 27, 1964,
Pub. L. 88–497, § 2,
78 Stat. 613; Aug. 16, 1968,
Pub. L. 90–490, title III, § 302(b),
82 Stat. 789; Mar. 12, 1970,
Pub. L. 91–208, § 3,
84 Stat. 52; Oct. 30, 1970,
Pub. L. 91–515, title VI, § 601(b)(2),
84 Stat. 1311; June 18, 1973,
Pub. L. 93–45, title I, § 104(a),
87 Stat. 91; renumbered § 312 and amended July 23, 1974,
Pub. L. 93–353, title I, § 102(b),
88 Stat. 362; Oct. 12, 1976,
Pub. L. 94–484, title I, § 101(a)(1),
90 Stat. 2244, related to graduate or specialized training for physicians, engineers, nurses, and other professional personnel.