42 U.S.C. § 7613
Section, act July 14, 1955, ch. 360, title III, §313, formerly §306, as added Nov. 21, 1967, Pub. L. 90-148, §2, 81 Stat. 506; renumbered §313 and amended Dec. 31, 1970, Pub. L. 91-604, §§12(a), 15(c)(2), 84 Stat. 1705, 1713; Aug. 7, 1977, Pub. L. 95-95, title III, §302(b), 91 Stat. 771, required annual report to Congress on progress of programs under this chapter.