30 CFR § 75.1702
No person shall smoke, carry smoking materials, matches, or lighters
underground, or smoke in or around oil houses, explosives magazines, or other
surface areas where such practice may cause a fire or explosion. The operator
shall institute a program, approved by the Secretary, to insure that any
person entering the underground area of the mine does not carry smoking
materials, matches, or lighters.
[35 FR 17890, Nov. 20, 1970, as amended at 47 FR 14696, Apr. 6, 1982; 60 FR 33719, June 29, 1995]