37 Pa. Code § 21.52
(a) Proposed suspension/revocation. A notice of proposed suspension/revocation to a certified/approved person or entity may be issued. The notice will contain an explanation of the basis for his proposed suspension/revocation, with specific information regarding the individual’s or entity’s right to a hearing. If the notified party timely requests a hearing, the request shall serve to stay the proposed suspension/revocation pending the outcome of the hearing and the Commissioner’s final determination. The notice may be issued whenever: