(a) If the right to possession of a child is not governed by an order, the court in a habeas corpus proceeding involving the right of possession of the child:
(1) shall compel return of the child to the parent if the right of possession is between a parent and a nonparent and a suit affecting the parent-child relationship has not been filed; or
(2) may either compel return of the child or issue temporary orders under Chapter 105 if a suit affecting the parent-child relationship is pending and the parties have received notice of a hearing on temporary orders set for the same time as the habeas corpus proceeding.
(b) The court may not use a habeas corpus proceeding to adjudicate the right of possession of a child between two parents or between two or more nonparents.
Official text of the Texas Family Code as published by the Texas Legislative Council.