49 C.F.R. § 325.31 Scope of the rules in this subpart.
Title 49 - Transportation
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.
Title 49: Transportation
PART 325—COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS
Subpart D—Measurement of Noise Emissions; Highway Operations
§ 325.31 Scope of the rules in this subpart.
