16 CFR § 309.4 - Preemption.

---
identifier: "/us/cfr/t16/s309.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "16 CFR § 309.4 - Preemption."
title_number: 16
title_name: "Commercial Practices"
section_number: "309.4"
section_name: "Preemption."
chapter_name: "FEDERAL TRADE COMMISSION"
subchapter_number: "C"
subchapter_name: "REGULATIONS UNDER SPECIFIC ACTS OF CONGRESS"
part_number: "309"
part_name: "LABELING REQUIREMENTS FOR ALTERNATIVE FUELS AND ALTERNATIVE FUELED VEHICLES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 13232(a)."
regulatory_source: "60 FR 26955, May 19, 1995, unless otherwise noted."
cfr_part: "309"
---


# 309.4 Preemption.

Inconsistent state and local regulations are preempted to the extent they would frustrate the purposes of this part.