---
kind: "section"
citation: "42 U.S.C. § 7471"
title: "42"
title_heading: "The Public Health and Welfare"
number: "7471"
heading: "Plan requirements"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/7471"
units:
  - "Chapter 85 — Air Pollution Prevention and Control"
  - "Subchapter I — Programs and Activities"
  - "Part C — Prevention of Significant Deterioration of Air Quality"
  - "Subpart i — clean air"
---

# §7471. Plan requirements


In accordance with the policy of [section 7401(b)(1) of this title](/usc/42/7401.md?p=b-1), each [applicable implementation plan](/usc/42/7602.md?p=q) shall contain [emission limitations](/usc/42/7602.md?p=k) and such other measures as may be necessary, as determined under regulations promulgated under this part, to prevent significant deterioration of air quality in each region (or portion thereof) designated pursuant to [section 7407 of this title](/usc/42/7407.md) as attainment or unclassifiable.


## Source credit

(July 14, 1955, ch. 360, title I, § 161, as added Pub. L. 95–95, title I, § 127(a), Aug. 7, 1977, 91 Stat. 731; amended Pub. L. 101–549, title I, § 110(1), Nov. 15, 1990, 104 Stat. 2470.)

## Notes

### Editorial Notes

### Amendments

1990—Pub. L. 101–549 substituted “designated pursuant to section 7407 of this title as attainment or unclassifiable” for “identified pursuant to section 7407(d)(1)(D) or (E) of this title”.