---
kind: "section"
citation: "30 C.F.R. § 7.509"
title: "30"
number: "7.509"
heading: "Approval markings."
url: "https://uscodex.org/cfr/30/7.509"
---

# §7.509. Approval markings.

- (a) Each approved refuge alternative or component shall be identified by a legible, permanent approval marking that is securely and conspicuously attached to the component or its container.
- (b) The approval marking shall be inscribed with the component's MSHA approval number and any additional markings required by the approval.
- (c) The refuge alternative structure shall provide a conspicuous means for indicating an out-of-service status, including the reason it is out of service.
- (d) The airlock shall be conspicuously marked with the recommended maximum number of persons that can use it at one time.

## Notes

### Source

Source: 74 FR 80694, Dec. 31, 2008, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 957.

### Source

Source: 53 FR 23500, June 22, 1988, unless otherwise noted.