Tex. Family Code § 262.203

(a) On the motion of a party or the court's own motion, if applicable, the court that rendered the temporary order shall in accordance with procedures provided by Chapter 155:

(1) transfer the suit to the court of continuing, exclusive jurisdiction, if any, within the time required by Section 155.207(a), if the court finds that the transfer is:

(A) necessary for the convenience of the parties; and

(B) in the best interest of the child;

(2) order transfer of the suit from the court of continuing, exclusive jurisdiction; or

(3) if grounds exist for transfer based on improper venue, order transfer of the suit to the court having venue of the suit under Chapter 103.

(b) Notwithstanding Section 155.204, a motion to transfer relating to a suit filed under this chapter may be filed separately from the petition and is timely if filed while the case is pending.

(c) Notwithstanding Sections 6.407 and 103.002, a court exercising jurisdiction under this chapter is not required to transfer the suit to a court in which a parent has filed a suit for dissolution of marriage before a final order for the protection of the child has been rendered under Subchapter E, Chapter 263.

(d) An order of transfer must include:

(1) the date of any future hearings in the case that have been scheduled by the transferring court;

(2) any date scheduled by the transferring court for the dismissal of the suit under Section 263.401; and

(3) the name and contact information of each attorney ad litem or guardian ad litem appointed in the suit.

(e) The court to which a suit is transferred may retain an attorney ad litem or guardian ad litem appointed by the transferring court. If the court finds that the appointment of a new attorney ad litem or guardian ad litem is appropriate, the court shall appoint that attorney ad litem or guardian ad litem before the earlier of:

(1) the 10th day after the date of receiving the order of transfer; or

(2) the date of the first scheduled hearing after the transfer.