30 C.F.R. § 57.22102 Smoking (I-C mines).
Title 30 - Mineral Resources
(a) Persons shall not smoke or carry smoking materials, matches, or lighters underground or within 50 feet of a mine opening. The operator shall institute a reasonable program to assure that persons entering the mine do not carry such items. (b) Smoking is prohibited in surface milling facilities except in designated, dust-free smoking areas.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
§ 57.22102 Smoking (I-C mines).

