Upon the enactment of this part, all-
and which are in existence on August 7, 1977, shall be class I areas and may not be redesignated. All areas which were redesignated as class I under regulations promulgated before August 7, 1977, shall be class I areas which may be redesignated as provided in this part. The extent of the areas designated as Class I under this section shall conform to any changes in the boundaries of such areas which have occurred subsequent to August 7, 1977, or which may occur subsequent to November 15, 1990.
All areas in such State designated pursuant to section 7407(d) of this title as attainment or unclassifiable which are not established as class I under subsection (a) shall be class II areas unless redesignated under section 7474 of this title.
42 U.S.C. § 7472
EDITORIAL NOTES
AMENDMENTS1990-Subsec. (a). Pub. L. 101-549, §108(m), inserted at end "The extent of the areas designated as Class I under this section shall conform to any changes in the boundaries of such areas which have occurred subsequent to August 7, 1977, or which may occur subsequent to November 15, 1990."Subsec. (b). Pub. L. 101-549, §110(2), substituted "designated pursuant to section 7407(d) of this title as attainment or unclassifiable" for "identified pursuant to section 7407(d)(1)(D) or (E) of this title".1977-Subsec. (a)(4). Pub. L. 95-190 inserted a comma after "size".
- State
- The term "State" means a State, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands, Guam, and American Samoa and includes the Commonwealth of the Northern Mariana Islands.