Section, act July 1, 1944, ch. 373, title II, § 225, as added Oct. 27, 1972, Pub. L. 92–585, § 5, 86 Stat. 1293; amended Aug. 23, 1974, Pub. L. 93–385, § 1, 88 Stat. 741; Apr. 22, 1976, Pub. L. 94–278, title IX, § 901, 90 Stat. 415; Sept. 30, 1976, Pub. L. 94–437, title I, § 104, 90 Stat. 1403; Oct. 12, 1976, Pub. L. 94–484, title I, § 101(t), 90 Stat. 2246, related to Public Health and National Health Service Corps Scholarship Training program.