(a) To be appointed an authorized agent, an individual must be at least 18 years old and licensed as an individual owner, stable foreman, assistant trainer, or a trainer. A written agency appointment authorizing him or her to act on behalf of a licensed owner or licensed trainer in racing matters not directly related to the care and training of horses must accompany the appointment. The authorization shall be on a form provided by the Commission and shall define the agent's powers and limits. The authorization must be signed by the principals and the agent.(b) A separate agency appointment is required for each principal an authorized agent intends to represent.(c) An agency appointment expires on the last day of the twelfth month after the date of appointment or when the principal submits written notice of revocation to the stewards or racing judges, whichever occurs first.