Tex. Fam. Code § 160.103
(b) The court shall apply the law of this state to adjudicate the parent-child relationship. The applicable law does not depend on:
Amended by Acts 2001, 77th Leg., ch. 821, Sec. 1.01, eff. June 14, 2001;
Acts 2003, 78th Leg., ch. 457, Sec. 3, eff. Sept. 1, 2003.
Acts 2009, 81st Leg., R.S., Ch. 767 (S.B. 865), Sec. 22, eff. June 19, 2009.