{"data":{"id":"us/40-cfr-211.211","jurisdiction":"us","citation":"40 CFR 211.211","heading":"Compliance with labeling requirement.","body":"(a) All hearing protective devices manufactured after the effective date of this regulation, and meeting the applicability requirements of § 211.201, must be labeled according to this subpart, and must comply with the Labeled Values of mean attenuation.\n(b) A manufacturer must take into account both product variability and test-to-test variability when labeling his devices in order to meet the requirements of paragraph (a) of this section. A specific category is considered when the attenuation value at the tested one-third octave band is equal to or greater than the Labeled Value, or mean attenuation value, stated in the supporting information required by § 211.204-4, for that tested frequency. The attenuation value must be determined according to the test procedures of § 211.206. The Noise Reduction Rating for the label must be calculated using the Labeled Values of mean attenuation that will be included in the supporting information required by § 211.204-4.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER G—NOISE ABATEMENT PROGRAMS","PART 211—PRODUCT NOISE LABELING","Subpart B—Hearing Protective Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"1f73956517916bddbf7bab8787719ac3e1e71d17442f20d8a633575ea2dc3b2f","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-211.210-2","next":"us/40-cfr-211.212"},"notice":"GroundRules: Original legal text. Not legal advice."}