Unless otherwise specifically ordered by the court in its order or decree, nothing in this chapter or in chapter 26-8A , 26-8B , or 26-8C gives the conservatorship of the estate of the child to any guardian appointed or changes the age of minority of a child for any purpose unless the child is a person under twenty - one years of age who is under the continuing jurisdiction of the court, as defined in § 26-7A-1 , is under commitment to the Department of Corrections or is under continuing foster care pursuant to §