The provisions of 30 CFR 77.1012 (relating to jackhammers; operation; safeguards) are incorporated by reference.
25 Pa. Code § 208.304
The provisions of this §208.304 issued under sections 106 and 106.1 of the Bituminous Coal Mine Safety Act (52 P. S. §§ 690-106 and 690-106.1).