(a) Respiratory equipment approved by NIOSH under 42 CFR part 84 shall be made available to all persons as required under parts 70, 71, and 90 of this chapter. Use of respirators shall not be substituted for environmental control measures in the active workings. Each operator shall maintain an adequate supply of respiratory equipment.
CFR 30-72.700-2014 history
2014CFR 30-72.700-2014 Mineral Resources. Part72:Health standards for coal mines. Section72.700:Respiratory equipment; respirable dust.