Code of Federal Regulations · Section
§ 325.21 — Scope Of The Rules In This Subpart
49 C.F.R. § 325.21
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The rules in this subpart specify criteria for sound level measurement systems which are used to make the sound level measurements specified in subpart D and subpart E of this part.
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