The provisions of 30 CFR 77.704-11 (relating to use of grounded messenger wires; ungrounded systems) are incorporated by reference.
25 Pa. Code § 208.232
The provisions of this §208.232 issued under sections 106 and 106.1 of the Bituminous Coal Mine Safety Act (52 P. S. §§ 690-106 and 690-106.1).