58 Pa. Code § 183.453
Complaints shall be filed with the Commission at its principal office in Harrisburg, Pennsylvania. Complaints shall contain all pertinent information known to the complainant.
This section cited in 58 Pa. Code § 183.62 (relating to duties of judges); 58 Pa. Code § 183.67 (relating to duties of starter); 58 Pa. Code § 183.451 (relating to definitions); and 58 Pa. Code § 183.456 (relating to refusal, suspension or revocation of license with prior hearing).