Section was formerly classified to section 1857i of this title.

A prior section 310 of act July 14, 1955, was renumbered section 317 by Pub. L. 91–604 and is set out as a Short Title note under section 7401 of this title.

Provisions similar to those in subsec. (a) of this section were contained in section 1857f of this title, act July 14, 1955, ch. 360, § 7, 69 Stat. 323, prior to the general amendment of this chapter by Pub. L. 88–206.

1970—Subsec. (a). Pub. L. 91–604, § 15(c)(2), substituted “Administrator” for “Secretary”.

1967—Subsec. (b). Pub. L. 90–148 substituted reference to section 246 of this title for reference to section 246(c) of this title.

All rules, regulations, orders, determinations, contracts, certifications, authorizations, delegations, or other actions duly issued, made, or taken by or pursuant to act July 14, 1955, the Clean Air Act, as in effect immediately prior to the date of enactment of Pub. L. 95–95 [Aug. 7, 1977] to continue in full force and effect until modified or rescinded in accordance with act July 14, 1955, as amended by Pub. L. 95–95 [this chapter], see section 406(b) of Pub. L. 95–95, set out as an Effective Date of 1977 Amendment note under section 7401 of this title.