49 CFR § 538.1 - Scope.

---
identifier: "/us/cfr/t49/s538.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 538.1 - Scope."
title_number: 49
title_name: "Transportation"
section_number: "538.1"
section_name: "Scope."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "538"
part_name: "MANUFACTURING INCENTIVES FOR ALTERNATIVE FUEL VEHICLES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 32901, 32905, and 32906; delegation of authority at 49 CFR 1.95."
regulatory_source: "61 FR 14511, Apr. 2, 1996, unless otherwise noted."
cfr_part: "538"
---


# 538.1 Scope.

This part establishes minimum driving range criteria to aid in identifying passenger automobiles that are dual-fueled automobiles. It also establishes gallon equivalent measurements for gaseous fuels other than natural gas.

[75 FR 25728, May 7, 2010]