Texas Family Code - FAM § 157.372. Return of Child

(a) Subject to Chapter 152 and the Parental Kidnapping Prevention Act (28 U.S.C. Section 1738A), if the right to possession of a child is governed by a court order, the court in a habeas corpus proceeding involving the right to possession of the child shall compel return of the child to the relator only if the court finds that the relator is entitled to possession under the order.

(b) If the court finds that the previous order was granted by a court that did not give the contestants reasonable notice of the proceeding and an opportunity to be heard, the court may not render an order in the habeas corpus proceeding compelling return of the child on the basis of that order.