49 CFR § 577.4 - Definitions.

---
identifier: "/us/cfr/t49/s577.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 577.4 - Definitions."
title_number: 49
title_name: "Transportation"
section_number: "577.4"
section_name: "Definitions."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "577"
part_name: "DEFECT AND NONCOMPLIANCE NOTIFICATION"
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. 30102, 30103, 30116-121, 30166; delegation of authority at 49 CFR 1.95 and 49 CFR 501.8."
regulatory_source: "41 FR 56816, Dec. 30, 1976, unless otherwise noted."
cfr_part: "577"
---


# 577.4 Definitions.

For the purposes of this part:

*Act* means 49 U.S.C. Chapter 30101-30169.

*Administrator* means the Administrator of the National Highway Traffic Safety Administration or his delegate.

*First purchaser* means the first purchaser in good faith for a purpose other than resale.

*Leased motor vehicle* means any motor vehicle that is leased to a person for a term of at least four months by a lessor who has leased five or more vehicles in the twelve months preceding the date of notification by the vehicle manufacturer of the existence of a safety-related defect or noncompliance with a Federal motor vehicle safety standard in the motor vehicle.

*Lessee* means a person who is the lessee of a leased motor vehicle as defined in this section.

*Lessor* means a person or entity that is the owner, as reflected on the vehicle's title, of any five or more leased vehicles (as defined in this section), as of the date of notification by the manufacturer of the existence of a safety-related defect or noncompliance with a Federal motor vehicle safety standard in one or more of the leased motor vehicles.

*Owners* includes purchaser.

[41 FR 56816, Dec. 30, 1976, as amended at 60 FR 17270, Apr. 5, 1995]