(a) Each operator shall make available to each miner employed by the operator who goes underground and to visitors authorized to enter the mine by the operator a self-rescue device or devices approved by the Secretary which is adequate to protect such person for one hour or longer.
(b) Before any miner employed by the operator or visitor authorized by the operator goes underground the operator shall instruct and train such person in the use and location of the self-rescue device or devices made available at the mine. Instruction and training of miners and visitors shall be in accordance with provisions set forth in 30 CFR part 48.
053-4 Wyo. Code R. § 75.1714