StacksVerified U.S. regulatory reference

49 CFR §581.4

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.