---
kind: "section"
citation: "42 U.S.C. § 7424"
title: "42"
title_heading: "The Public Health and Welfare"
number: "7424"
heading: "Assurance of adequacy of State plans"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/42/7424"
units:
  - "Chapter 85 — Air Pollution Prevention and Control"
  - "Subchapter I — Programs and Activities"
  - "Part A — Air Quality and Emission Limitations"
---

# §7424. Assurance of adequacy of State plans

- (a) **State review of implementation plans which relate to major fuel burning sources—** As expeditiously as practicable but not later than one year after August 7, 1977, each [State](/usc/42/7602.md?p=d) shall review the provisions of its implementation plan which relate to major fuel burning sources and shall determine—
  - (1) the extent to which compliance with requirements of such plan is dependent upon the use by major fuel burning [stationary sources](/usc/42/7602.md?p=z) of petroleum products or natural gas,
  - (2) the extent to which such plan may reasonably be anticipated to be inadequate to meet the requirements of this chapter in such [State](/usc/42/7602.md?p=d) on a reliable and long-term basis by reason of its dependence upon the use of such fuels, and
  - (3) the extent to which compliance with the requirements of such plan is dependent upon use of coal or coal derivatives which is not locally or regionally available.

  Each [State](/usc/42/7602.md?p=d) shall submit the results of its review and its determination under this paragraph to the [Administrator](/usc/42/7602.md?p=a) promptly upon completion thereof.

- (b) **Plan revision—**
  - (1) Not later than eighteen months after August 7, 1977, the [Administrator](/usc/42/7602.md?p=a) shall review the submissions of the [States](/usc/42/7602.md?p=d) under [subsection (a)](#a) and shall require each [State](/usc/42/7602.md?p=d) to revise its plan if, in the judgment of the [Administrator](/usc/42/7602.md?p=a), such plan revision is necessary to assure that such plan will be adequate to assure compliance with the requirements of this chapter in such [State](/usc/42/7602.md?p=d) on a reliable and long-term basis, taking into account the actual or potential prohibitions on use of petroleum products or natural gas, or both, under any other authority of law.
  - (2) Before requiring a plan revision under this subsection, with respect to any [State](/usc/42/7602.md?p=d) the [Administrator](/usc/42/7602.md?p=a) shall take into account the report of the review conducted by such [State](/usc/42/7602.md?p=d) under [paragraph (1)](#b-1) and shall consult with the Governor of the [State](/usc/42/7602.md?p=d) respecting such required revision.

## Source credit

(July 14, 1955, ch. 360, title I, § 124, as added Pub. L. 95–95, title I, § 122, Aug. 7, 1977, 91 Stat. 722.)

## Notes

### Statutory Notes and Related Subsidiaries

### Effective Date

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