Except as otherwise provided by law, an order of disposition committing a delinquent or unruly child to the Department of Juvenile Justice continues in force for two years or until the child is sooner discharged by the Department of Juvenile Justice. The court which made the order may extend its duration for an additional two years subject to like discharge, if:

(1) A hearing is held upon motion of the Department of Juvenile Justice prior to the expiration of the order;

(2) Reasonable notice of the factual basis of the motion and of the hearing and an opportunity to be heard are given to the child and the parent, guardian, or other custodian; and

(3) The court finds that the extension is necessary for the treatment or rehabilitation of the child.