Editorial Notes Codification Section, Pub. L. 91–616, title V, § 501 , as added Pub. L. 94–371, § 7 , July 26, 1976 , 90 Stat. 1038 ; amended Pub. L. 95–622, title II, § 268(c) , (d), Nov. 9, 1978 , 92 Stat. 3437 ; Pub. L. 96–180, § 14 , Jan. 2, 1980 , 93 Stat. 1305 , which directed Secretary to take certain steps to encourage research, was redesignated section 510 of the Public Health Service Act by Pub. L. 98–24, § 2(b)(9) , Apr. 26, 1983 , 97 Stat. 179 , and is classified to section 290bb of this title . A prior section 501 of Pub. L. 91–616 , title V, Dec. 31, 1970 , 84 Stat. 1854 , was renumbered 601 by section 7 of Pub. L. 94–371 , and is classified to section 4591 of this title .