Title 42 — The Public Health and WelfareRelease 119-73
§7472 Initial classifications
Title 42 › Chapter CHAPTER 85— - AIR POLLUTION PREVENTION AND CONTROL › Subchapter SUBCHAPTER I— - PROGRAMS AND ACTIVITIES › Part Part C— - Prevention of Significant Deterioration of Air Quality › Subpart subpart i— - clean air › § 7472
Summary
When enacted: international parks; wilderness or memorial parks over 5,000 acres; and national parks over 6,000 acres in that State are Class I. Other §7407(d) areas are Class II unless redesignated under §7474.
Full Legal Text
Title 42, §7472
The Public Health and Welfare — Source: USLM XML via OLRC
(a)Upon the enactment of this part, all—
(1)international parks,
(2)national wilderness areas which exceed 5,000 acres in size,
(3)national memorial parks which exceed 5,000 acres in size, and
(4)national parks which exceed six thousand acres in size,
(b)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.
Legislative History
Notes & Related Subsidiaries
Editorial Notes
Amendments
1990—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”.
Reference
Citations & Metadata
Citation
42 U.S.C. § 7472
Title 42 — The Public Health and Welfare
Last Updated
Apr 6, 2026
Release point: 119-73