C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER O—COAL MINE SAFETY AND HEALTH › PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES › Subpart O—Hoisting and Mantrips

30 C.F.R. § 75.1402-2

Tests of signaling systems

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Signaling systems used for communication between shaft stations and the hoist room shall be tested daily.