(a) The department may petition the juvenile court that entered the order of commitment for a child for the initiation of mental health commitment proceedings if the child is committed to the department under a determinate sentence under § 54.04(d)(3), 54.04(m), or 54.05(f), Family Code.
(b) A petition made by the department shall be treated as a motion under § 55.11, Family Code, and the juvenile court shall proceed in accordance with Subchapter B, Chapter 55, Family Code.

(c) The department shall cooperate with the juvenile court in any proceeding under this section.
(d) The juvenile court shall credit to the term of the child’s commitment to the department any time the child is committed to an inpatient mental health facility.
(e) A child committed to an inpatient mental health facility as a result of a petition filed under this section may not be released from the facility on a pass or furlough.
(f) If the term of an order committing a child to an inpatient mental health facility is scheduled to expire before the end of the child’s sentence and another order committing the child to an inpatient mental health facility is not scheduled to be entered, the inpatient mental health facility shall notify the juvenile court that entered the order of commitment committing the child to the department. The juvenile court may transfer the child to the custody of the department, transfer the child to the Texas Department of Criminal Justice, or release the child under supervision, as appropriate.