Code of Federal Regulations · Section
§ 23.6 — General Requirements For Approval
30 C.F.R. § 23.6
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Telephones and signaling devices shall be durable in construction, practical in operation, and suitable for conditions of underground service. They shall offer no probable explosion hazard under normal operation if use in gassy or dusty mine atmospheres.
Authorizing Statute
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Promulgation of regulations30 U.S.C. § 957
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Mandatory safety and health standards30 U.S.C. § 811