(a) The operator shall provide mine rescue coverage at each active underground mine.
(b) Mine rescue coverage may be provided by:
(1) Establishing at least two mine rescue teams which are available at all times when miners are underground; or
(a) The operator shall provide mine rescue coverage at each active underground mine.
(b) Mine rescue coverage may be provided by:
(1) Establishing at least two mine rescue teams which are available at all times when miners are underground; or