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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Sep 16, 2025
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Title 49
Chapter III
Part 325
Subpart A - Subpart A—General Provisions
§ 325.1 - Scope of the rules in this part.
§ 325.3 - [Reserved]
§ 325.5 - Definitions.
§ 325.7 - Allowable noise levels.
§ 325.9 - Measurement tolerances.
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