52 Pa. Code § 56.336
When service is actually terminated, notice that reflects the requirements in § 56.331 (relating to general notice provisions and contents of termination notice) as well as a medical emergency notice in the form which appears in Appendix B (relating to medical emergency notice) shall be delivered to a responsible adult occupant at the residence of the customer or conspicuously posted at the affected premises.
52 Pa. Code § 56.336
This section cited in 52 Pa. Code § 56.261 (relating to billing frequency); 52 Pa. Code § 56.266 (relating to transfer of accounts); 52 Pa. Code § 56.331 (relating to general notice provisions and contents of termination notice); 52 Pa. Code § 56.357 (relating to termination upon expiration of medical certification); 52 Pa. Code § 56.358 (relating to right of public utility to petition the Commission); and 52 Pa. Code § 56.393 (relating to termination pending resolution of the dispute).