The Clean Air Act, referred to in text, is act July 14, 1955, ch. 360, as amended generally by Pub. L. 88–206, Dec. 17, 1963, 77 Stat. 392, and later by Pub. L. 95–95, Aug. 7, 1977, 91 Stat. 685. The Clean Air Act was originally classified to chapter 15B (§ 1857 et seq.) of Title 42, The Public Health and Welfare. On enactment of Pub. L. 95–95, the Act was reclassified to chapter 85 (§ 7401 et seq.) of Title 42. Part C of the Clean Air Act is classified generally to part C (§ 7470 et seq.) of subchapter I of chapter 85 of Title 42. For complete classification of this Act to the Code, see Short Title note set out under section 7401 of Title 42 and Tables.

Section was formerly classified to section 460m–24 of this title.