58 Pa. Code § 185.73 – Complaints.

(a) Complaints shall be filed with the Commission at its principal office in Harrisburg, Pennsylvania.
(b) Complaints shall contain all pertinent information known to the complainant. A suggested form of complaint appears in Appendix A. Forms shall be available at the Commission office in Harrisburg, Pennsylvania.

This section cited in 58 Pa. Code § 185.77 (relating to refusal, suspension or revocation of license with prior hearing).