§ 632. Order dismissing petition. (a) If the allegations of a petition
under this part are not established, the court shall dismiss the
petition.

(b) If a motion or application has been made in the course of a
proceeding under this part to reconsider an underlying order of
placement or commitment, or upon the court's own motion on notice to all
parties, the court retains jurisdiction to dispose of that motion or
application regardless of whether it dismisses the petition.