Code of Federal Regulations · Section
§ 84.80 — Interchangeability Of Oxygen And Air Prohibited
42 C.F.R. § 84.80
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Approvals shall not be issued by the Institute for any apparatus, combination of respirator assemblies, or any apparatus or respirator component which is designed or constructed to permit the interchangeable use of oxygen and air.
Authorizing Statute
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Duties of United States Bureau of Mines30 U.S.C. § 3