Tex. Fin. Code § 274.003
An entity is a subsidiary trust company of a bank holding company if:
(1) the entity is a:
Acts 1997, 75th Leg., ch. 1008, Sec. 1, eff. Sept. 1, 1997.
Amended by Acts 1999, 76th Leg., ch. 62, Sec. 7.52, eff. Sept. 1, 1999;
Acts 1999, 76th Leg., ch. 344, Sec. 2.030, eff. Sept. 1, 1999.
Acts 2007, 80th Leg., R.S., Ch. 237 (H.B. 1962), Sec. 79, eff. September 1, 2007.