(a) The court retains jurisdiction over a person, without regard to the age of the person, for conduct engaged in by the person before becoming 17 years of age if, as a result of an appeal by the person or the state under Chapter 56 of an order of the court, the order is reversed or modified and the case remanded to the court by the appellate court.
(b) If the respondent is at least 18 years of age when the order of remand from the appellate court is received by the juvenile court, the juvenile court shall proceed as provided by Sections 54.02(o)-(r) for the detention of a person at least 18 years of age in discretionary transfer proceedings. Pending retrial of the adjudication or transfer proceeding, the juvenile court may:
(1) order the respondent released from custody;
(2) order the respondent detained in a juvenile detention facility; or
(3) set bond and order the respondent detained in a county adult facility if bond is not made.