(a) Any designation or appointment of a parental successor is subject to revocation at any time, in the first instance by the person who made the decision, and in the case of appointment by will or formal appointment, by the court in which the will was probated or the formal appointment was made. A person or organization named as parental successor may renounce or resign at any time.
(b) No revocation, renunciation, resignation, death, or state of incapacity will be binding on the director of the department of behavioral healthcare, developmental disabilities and hospitals until he or she has been notified in writing hereof.