(a) The person and the person's attorney are entitled to receive a copy of the application and written notice of the time and place of the hearing immediately after the date for the hearing is set.
(b) A copy of the application and the written notice shall be delivered in person or sent by certified mail to:
(1) the person's parent, if the person is a minor;
(2) the person's appointed guardian, if the person is the subject of a guardianship; or
(3) each managing and possessory conservator, that has been appointed for the person.
(c) The court shall appoint a guardian ad litem for a minor if the parent cannot be located and a guardian or conservator has not been appointed.