25 Pa. Code § 208.11 – Seals.

(a) Seal installation. The provisions of 30 CFR 75.335(c)(relating to seal strengths, design applications, and installation) are incorporated by reference.
(b) Seal Strength greater than 120 psi. The provisions of 30 CFR 75.335(a)(3) shall be used for determining when the strength of a seal shall exceed 120 psi.
(c) Seal installation approval. The operator shall submit an application to install the MSHA-approved seal design to the Department for its review and approval concerning seal installation. An approved application to install the seal shall be made part of the abandoned area ventilation plan required under section 235 of the act (52 P. S. § 690-235) regarding unused and abandoned parts of mines and follow 30 CFR 75.335(c).
1. (1) The operator shall provide the representative of the miners, if applicable, the approved seal design installation application at the same time the operator submits the application to the Department.
2. (2) Any individual installing the seal shall do so in accordance with the approved abandoned area ventilation plan.