---
kind: "section"
citation: "49 U.S.C. § 32919"
title: "49"
title_heading: "Transportation"
number: "32919"
heading: "Preemption"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/49/32919"
units:
  - "Subtitle VI — Motor Vehicle and Driver Programs"
  - "Part C — Information, Standards, and Requirements"
  - "Chapter 329 — Automobile Fuel Economy"
---

# §32919. Preemption

- (a) **General.—** When an [average fuel economy standard](/usc/49/32901.md?p=a-6) prescribed under this chapter is in effect, a [State](/usc/49/30102.md?p=a-12) or a political subdivision of a [State](/usc/49/30102.md?p=a-12) may not adopt or enforce a law or regulation related to [fuel economy](/usc/49/32901.md?p=a-11) standards or [average fuel economy standards](/usc/49/32901.md?p=a-6) for automobiles covered by an [average fuel economy standard](/usc/49/32901.md?p=a-6) under this chapter.
- (b) **Requirements Must Be Identical.—** When a requirement under [section 32908 of this title](/usc/49/32908.md) is in effect, a [State](/usc/49/30102.md?p=a-12) or a political subdivision of a [State](/usc/49/30102.md?p=a-12) may adopt or enforce a law or regulation on disclosure of [fuel economy](/usc/49/32901.md?p=a-11) or [fuel](/usc/49/32901.md?p=a-10) operating costs for an automobile covered by [section 32908](/usc/49/32908.md) only if the law or regulation is identical to that requirement.
- (c) **State and Political Subdivision Automobiles.—** A [State](/usc/49/30102.md?p=a-12) or a political subdivision of a [State](/usc/49/30102.md?p=a-12) may prescribe requirements for [fuel economy](/usc/49/32901.md?p=a-11) for automobiles obtained for its own use.

## Source credit

(Pub. L. 103–272, § 1(e), July 5, 1994, 108 Stat. 1075, § 32918; renumbered § 32919, Pub. L. 103–429, § 6(43)(A), Oct. 31, 1994, 108 Stat. 4382.)

## Notes

| Historical and Revision Notes |  |  |
| --- | --- | --- |
| Revised<br>Section | Source (U.S. Code) | Source (Statutes at Large) |
| 32918 | 15:2009. | Oct. 20, 1972, Pub. L. 92–513, 86 Stat. 947, § 509; added Dec. 22, 1975, Pub. L. 94–163, § 301, 89 Stat. 914. |

In subsection (a), the word “prescribed” is substituted for “established” for consistency.

### Editorial Notes

### Amendments

1994—Pub. L. 103–429 renumbered section 32918 of this title as this section.