Pennsylvania Statutes Title 52 P.S. Mines and Mining § 70-229. Withdrawal of workmen, noxious gases

If, at any time, it is found by the person in charge of a mine or any part thereof, that by reason of noxious gases prevailing in such mine or such part thereof, or of any cause whatever the mine or the said part is dangerous, every precaution shall be used to ensure the safety of the workmen; and every workman, except such persons as may be required to remove the danger, shall be withdrawn from the mine, or such part thereof as is so found dangerous, until the said mine or said part thereof is examined by the mine foreman, assistant mine foreman or mine examiner and reported by him to be safe.