49 CFR 531.4 - Definitions.

§ 531.4 Definitions.

(a)Statutory terms.

(1) The terms average fuel economy, manufacture, manufacturer, and model year are used as defined in section 501 of the Act.

(2) The terms automobile and passenger automobile are used as defined in section 501 of the Act and in accordance with the determination in part 523 of this chapter.

(b)Other terms. As used in this part, unless otherwise required by the context -

(1)Act means the Motor Vehicle Information and Cost Savings Act, as amended by Pub. L. 94-163.

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
U.S. Code: Title 49 - TRANSPORTATION

Title 49 published on 07-Sep-2017 04:47

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR Part 531 after this date.

  • 2017-08-21; vol. 82 # 160 - Monday, August 21, 2017
    1. 82 FR 39551 - Request for Comment on Reconsideration of the Final Determination of the Mid-Term Evaluation of Greenhouse Gas Emissions Standards for Model Year 2022-2025 Light-Duty Vehicles; Request for Comment on Model Year 2021 Greenhouse Gas Emissions Standards
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, ENVIRONMENTAL PROTECTION AGENCY, National Highway Traffic Safety Administration
      Request for comment.
      Comments must be received on or before October 5, 2017. EPA will announce the public hearing date and location for this document in a supplemental Federal Register publication.
      49 CFR Parts 523, 531, 533, 536 and 537