The Clean Air Act, referred to in subsec. (b)(1)(A)(i), is act July 14, 1955, ch. 360, 69 Stat. 322, which is classified generally to chapter 85 (§ 7401 et seq.) of this title. For complete classification of this Act to the Code, see Short Title note set out under section 7401 of this title and Tables.
Section is comprised of section 756 of Pub. L. 109–58. Subsec. (c) of section 756 of Pub. L. 109–58 amended section 127 of Title 23, Highways.