49 CFR § 555.4 - Definitions.
---
identifier: "/us/cfr/t49/s555.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 555.4 - Definitions."
title_number: 49
title_name: "Transportation"
section_number: "555.4"
section_name: "Definitions."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "555"
part_name: "TEMPORARY EXEMPTION FROM MOTOR VEHICLE SAFETY AND BUMPER STANDARDS"
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. 30113, 32502, Pub. L. 105-277; delegation of authority at 49 CFR 1.50."
regulatory_source: "38 FR 2694, Jan. 29, 1973, unless otherwise noted."
cfr_part: "555"
---
# 555.4 Definitions.
*Administrator* means the National Highway Traffic Safety Administrator or his delegate.
*Passenger motor vehicle* means a motor vehicle with motive power designed to carry not more than 12 individuals, but does not include a truck not designed primarily to carry its operator or passengers, or a motorcycle.
*United States* means the several States, the District of Columbia, the Commonwealth of Puerto Rico, Guam, the Virgin Islands, the Canal Zone, and American Samoa.
[38 FR 2694, Jan. 29, 1973, as amended at 64 FR 2861, Jan. 19, 1999]