49 CFR 538.4 - Definitions.

§ 538.4 Definitions.

(a)Statutory terms.

(1) The terms alternative fuel, alternative fueled automobile, and dual fueled automobile, are used as defined in 49 U.S.C. 32901(a).

(2) The terms automobile and passenger automobile, are used as defined in 49 U.S.C. 32901(a), and in accordance with the determinations in part 523 of this chapter.

(3) The term manufacturer is used as defined in 49 U.S.C. 32901(a)(13), and in accordance with part 529 of this chapter.

(4) The term model year is used as defined in 49 U.S.C. 32901(a)(15).


(1) Other terms. The terms average fuel economy, fuel economy, and model type are used as defined in subpart A of 40 CFR part 600.

(2) The term EPA means the U.S. Environmental Protection Agency.

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.

United States Code

Title 49 published on 09-May-2017 04:41

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR Part 538 after this date.

  • 2016-10-25; vol. 81 # 206 - Tuesday, October 25, 2016
    1. 81 FR 73881 - Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles—Phase 2
      GPO FDSys XML | Text
      Final rule.
      This final rule is effective on December 27, 2016. The incorporation by reference of certain publications listed in this regulation is approved by the Director of the Federal Register as of December 27, 2016.
      40 CFR Parts 9, 22, 85, 86, 600, 1033, 1036, 1037, 1039, 1042, 1043, 1065, 1066, and 1068