Code of Federal Regulations · Section
§ 325.31 — Scope Of The Rules In This Subpart
49 C.F.R. § 325.31
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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.
Authorizing Statute
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Leadership, consultation, and cooperation49 U.S.C. § 301
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Motor carrier noise emission standards42 U.S.C. § 4917