25 Pa. Code § 207.103
The person who is the owner or operator of a noncoal underground mine or developed facility shall ensure that the noncoal underground mine or developed facility is constructed and operated in accordance with this chapter. A subcontractor who conducts all or part of the operation shall be jointly and severally responsible with the owner or operator.
The provisions of this § 207.103 adopted April 9, 2004, effective April 10, 2004, 34 Pa.B. 2041.