Section was formerly classified to section 1857h–1 of this title.

A prior section 303 of act July 14, 1955, was renumbered section 310 by Pub. L. 91–604 and is classified to section 7610 of this title.

1990—Pub. L. 101–549, § 704(2)–(5), struck out subsec. (a) designation before “Notwithstanding any other”, struck out subsec. (b) which related to violation of or failure or refusal to comply with subsec. (a) orders, and substituted new provisions for provisions following first sentence which read as follows: “If it is not practicable to assure prompt protection of the health of persons solely by commencement of such a civil action, the Administrator may issue such orders as may be necessary to protect the health of persons who are, or may be, affected by such pollution source (or sources). Prior to taking any action under this section, the Administrator shall consult with the State and local authorities in order to confirm the correctness of the information on which the action proposed to be taken is based and to ascertain the action which such authorities are, or will be, taking. Such order shall be effective for a period of not more than twenty-four hours unless the Administrator brings an action under the first sentence of this subsection before the expiration of such period. Whenever the Administrator brings such an action within such period, such order shall be effective for a period of forty-eight hours or such longer period as may be authorized by the court pending litigation or thereafter.”

Pub. L. 101–549, § 704(1), which directed that “public health or welfare, or the environment” be substituted for “the health of persons and that appropriate State or local authorities have not acted to abate such sources”, was executed by making the substitution for “the health of persons, and that appropriate State or local authorities have not acted to abate such sources” to reflect the probable intent of Congress.

1977—Pub. L. 95–95 designated existing provisions as subsec. (a), inserted provisions that, if it is not practicable to assure prompt protection of the health of persons solely by commencement of a civil action, the Administrator may issue such orders as may be necessary to protect the health of persons who are, or may be, affected by such pollution source (or sources), that, prior to taking any action under this section, the Administrator consult with the State and local authorities in order to confirm the correctness of the information on which the action proposed to be taken is based and to ascertain the action which such authorities are, or will be, taking, that the order be effective for a period of not more than twenty-four hours unless the Administrator brings an action under the first sentence of this subsection before the expiration of such period, and that, whenever the Administrator brings such an action within such period, such order be effective for a period of forty-eight hours or such longer period as may be authorized by the court pending litigation or thereafter, and added subsec. (b).

Amendment by Pub. L. 95–95 effective Aug. 7, 1977, except as otherwise expressly provided, see section 406(d) of Pub. L. 95–95, set out as a note under section 7401 of this title.

Suits, actions, and other proceedings lawfully commenced by or against the Administrator or any other officer or employee of the United States in his official capacity or in relation to the discharge of his official duties under act July 14, 1955, the Clean Air Act, as in effect immediately prior to the enactment of Pub. L. 95–95 [Aug. 7, 1977], not to abate by reason of the taking effect of Pub. L. 95–95, see section 406(a) of Pub. L. 95–95, set out as an Effective Date of 1977 Amendment note under section 7401 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.