Section 211.212-6 - Determination of compliance(a) A category will be in compliance with these requirements if the results of the test conducted under the test request show that: (1) The mean attenuation value, at each one-third octave band center frequency as determined from the Compliance Audit Test values plus 3 dB(A), is equal to or greater than the mean attenuation value at the same one-third octave band as stated in the Supporting Information required by § 211.204-4 ; and(2) The Noise Reduction Rating, when calculated from the mean attenuation values determined by Compliance Audit Testing, equals or exceeds the Noise Reduction Rating as stated on the label required by § 211.204 .(b) If a category is not in compliance, as determined in paragraph (a) of this section, the manufacturer must satisfy the continued testing requirements of § 211.212-7 , and the relabeling requirements of § 211.212-8 before further distributing hearing protectors of that category in commerce.44 FR 56139, Sept. 28, 1979, as amended at 47 FR 57717, Dec. 28, 1982 Sec. 13 , Pub. L. 92-574 , 86 Stat. 1244 (42 U.S.C. 4912 )