(1) An authorized staff physician of the hospital shall discharge the child from the hospital within five (5) days, exclusive of holidays and weekends, after receipt of a child's notice of intent to leave, unless the hospital, the parent, or other person exercising custodial control or supervision files a notice of contest with the court within the five (5) day period.
(2) Copies of the notice of contest shall be delivered by the party originating it to:
(a) The child or his attorney;
(b) The child's parent or other person exercising custodial control or supervision; and (c) The hospital.
(3) The proponent of continued hospitalization shall file a petition for certification with his notice of contest.