49 CFR § 581.4 - Definitions.

---
identifier: "/us/cfr/t49/s581.4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 581.4 - Definitions."
title_number: 49
title_name: "Transportation"
section_number: "581.4"
section_name: "Definitions."
chapter_name: "NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "581"
part_name: "BUMPER STANDARD"
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. 32502; 322, 30111, 30115, 30117 and 30166; delegation of authority at 49 CFR 1.50."
regulatory_source: "42 FR 24059, May 12, 1977, unless otherwise noted."
cfr_part: "581"
---


# 581.4 Definitions.

All terms defined in 49 U.S.C. 32101 are used as defined therein.

*Bumper face bar* means any component of the bumper system that contacts the impact ridge of the pendulum test device.

[42 FR 24059, May 12, 1977, as amended at 64 FR 2862, Jan. 19, 1999]