---
kind: "section"
citation: "40 C.F.R. § 211.206-2"
title: "40"
number: "211.206-2"
heading: "Alternative test data."
url: "https://uscodex.org/cfr/40/211.206-2"
---

# §211.206-2. Alternative test data.

- (a) In lieu of testing according to [§ 211.206-1](/cfr/40/211.206-1.md), manufacturers may use the latest available test data obtained according to ANSI STD Z24.22-1957 or ANSI STD S3.19-1974 to determine the mean attenuation and standard deviation for each test frequency and the NRR calculated from those values. Manufacturers whose data is based on the ANSI STD Z24.22-1957 measurement procedure must state in the supporting information required by [§ 211.204-4](/cfr/40/211.204-4.md) that the mean attenuation and standard deviation values used to calculate the NRR are based on ANSI STD Z24.22-1957.
- (b) Manufacturers who initially use available data based on ANSI STD Z24.22-1957 must retest within one year of the effective date of this regulation (by September 27, 1981) the affected categories of hearing protectors in accordance with [§ 211.206-1](/cfr/40/211.206-1.md) of the regulation, and must relabel those categories as necessary.
- (c) Manufacturers who use available data based on ANSI STD S3.19-1974 are not required to retest the affected categories of hearing protectors.
- (d) If a manufacturer has both ANSI STD S3.19-1974 test data and ANSI STD Z24.22-1957 test data on a hearing protector category, that manufacturer must use the data obtained according to ANSI STD S3.19-1974.

## Notes

### Amendments

[45 FR 8275, Feb. 6, 1980]

### 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

[45 FR 8275, Feb. 6, 1980]