30 C.F.R. § 75.1402-1 Communication between shaft stations and hoist room.
Title 30 - Mineral Resources
One of the methods used to communicate between shaft stations and the hoist room shall give signals which can be heard by the hoisting engineer at all times while men are underground.
Title 30: Mineral Resources
PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES
Subpart O—Hoisting and Mantrips
§ 75.1402-1 Communication between shaft stations and hoist room.
