---
kind: "section"
citation: "40 C.F.R. § 211.211"
title: "40"
number: "211.211"
heading: "Compliance with labeling requirement."
url: "https://uscodex.org/cfr/40/211.211"
---

# §211.211. Compliance with labeling requirement.

- (a) All hearing protective devices manufactured after the effective date of this regulation, and meeting the applicability requirements of [§ 211.201](/cfr/40/211.201.md), must be labeled according to this subpart, and must comply with the Labeled Values of mean attenuation.
- (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)](#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](/cfr/40/211.204-4.md), for that tested frequency. The attenuation value must be determined according to the test procedures of [§ 211.206](/cfr/40/211.206.md). 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](/cfr/40/211.204-4.md).

## Notes

### Amendments

[47 FR 57717, Dec. 28, 1982]

### Authority

Authority: Sec. 8, Pub. L. 92-574, 86 Stat. 1241 (42 U.S.C. 4907), and additional authority as specified.

### Source

Source: 44 FR 56139, Sept. 28, 1979, unless otherwise noted.

### Source

Source: 44 FR 56127, Sept. 28, 1979, unless otherwise noted.

### Amendments

[47 FR 57717, Dec. 28, 1982]