Examine Place for Gas Prior to Start of Work and Other Times

Section 255. Examine Place for Gas Prior to Start of Work and Other Times.--Before the commencement of work the miner in charge shall examine his working place for gas and oxygen deficiency with an approved safety lamp and thoroughly test the roof, face and ribs with a suitable testing bar. A similar test shall also be made before starting any machine, before and after each blast fired during the working shift.