U.S. Code of Federal Regulations

Regulations most recently checked for updates: Sep 17, 2025

All TitlesTitle 30Chapter IPart 7Subpart L - Subpart L—Refuge Alternatives
§ 7.501 - Purpose and scope.
§ 7.502 - Definitions.
§ 7.503 - Application requirements.
§ 7.504 - Refuge alternatives and components; general requirements.
§ 7.505 - Structural components.
§ 7.506 - Breathable air components.
§ 7.507 - Air-monitoring components.
§ 7.508 - Harmful gas removal components.
§ 7.509 - Approval markings.
§ 7.510 - New technology.
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