(a) A patient or the patient's authorized representative may revoke a MOST Form at any time by:
(1) Directing the authorized health care professional who issued the MOST Form to cancel the MOST Form; or
(2) Communicating the patient's or the patient's authorized representative's intent to revoke the MOST Form to the treating EMS personnel or health care professional.
(b) If a patient or the patient's authorized representative revokes a MOST Form pursuant to subsection (a)(2) of this section, the treating EMS personnel or health care professional shall record the circumstances in which the MOST Form was revoked.