49 CFR 325.31 - Scope of the rules in this subpart.

Regulations last checked for updates: May 03, 2025

Title 49 - Transportation last revised: Mar 20, 2025

View all text of Subpart D [§ 325.31 - § 325.39]

§ 325.31 - Scope of the rules in this subpart.

The rules in this subpart specify conditions and procedures for measurement of the sound level generated by a motor vehicle engaged in a highway operation for the purpose of ascertaining whether the motor vehicle conforms to the Standards for Highway Operations set forth in 40 CFR 202.20.

authority: 42 U.S.C. 4917; 49 U.S.C. 301; and 49 CFR 1.87

source: 40 FR 42437, Sept. 12, 1975, unless otherwise noted.

cite as: 49 CFR 325.31