C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH › PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES › Subpart C—Fire Prevention and Control

30 C.F.R. § 56.4101

Warning signs

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Readily visible signs prohibiting smoking and open flames shall be posted where a fire or explosion hazard exists.