(a) Any minor or child committed to the custody of the department who has gained maximum benefit from institutional treatment, who is no longer in need of the services of the department, or who has gained maximum benefit from the programs of the department shall be discharged from the custody of the department. The minor or child shall not be received again by the department pursuant to the original commitment order unless deemed appropriate by a court of proper jurisdiction holding a subsequent hearing.
(b) The department shall notify the committing juvenile court or the court to which the case is transferred and the parties to the commitment action in writing, which must be received by the juvenile court at least 10 days in advance of the proposed discharge. The committing juvenile court, at the time of discharge, shall transfer custody to a person or another state department or agency deemed suitable by the juvenile court.