30 C.F.R. § 57.22101 Smoking (I-A, II-A, III, and V-A mines).
Title 30 - Mineral Resources
Persons shall not smoke or carry smoking materials, matches, or lighters underground. The operator shall institute a reasonable program to assure that persons entering the mine do not carry such items.
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
§ 57.22101 Smoking (I-A, II-A, III, and V-A mines).

