(1) A juvenile offender committed to a secure facility shall remain until the juvenile offender:
(a)  Reaches nineteen (19) years of age;
(b)  Is retained for extended custody pursuant to section 20-520(1)(t), Idaho Code; or
(c)  Is released or discharged.
(2)  A juvenile offender committed to a secure facility shall appear before the department within ninety (90) days after commitment for review of treatment plans. Additionally, the juvenile offender shall appear before the custody review board prior to eighteen (18) consecutive months in custody, and every six (6) months thereafter, to review his continued custody with the department.