Section was formerly classified to section 1857a of this title.
Provisions similar to those in the first clause of subsec. (a) of this section were contained in subsec. (b)(1) of a prior section 1857a, of this title, act July 14, 1955, ch. 360, § 2, 69 Stat. 322, prior to the general amendment of this chapter by Pub. L. 88–206.
1970—Subsecs. (a), (b). Pub. L. 91–604 substituted “Administrator” for “Secretary” wherever appearing.
1967—Subsec. (c). Pub. L. 90–148 inserted declaration that it is the intent of Congress that no agreement or compact entered into between States after the date of enactment of the Air Quality Act of 1967, which for purposes of codification was changed to