40 CFR §201.14
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Effective January 15, 1984, no carrier subject to this regulation shall operate retarders that exceed an adjusted average maximum A-weighted sound level of 83 dB at any receiving property measurement location, when measured with fast meter response in accordance with Subpart C of this part.