Tex. Bus. Orgs. Code § 6.153
An ownership interest in a domestic entity owned by another entity, whether a domestic or foreign entity, may be voted by the officer, agent, or proxy as authorized by:
Acts 2003, 78th Leg., ch. 182, Sec. 1, eff. Jan. 1, 2006.
Acts 2007, 80th Leg., R.S., Ch. 688 (H.B. 1737), Sec. 35, eff. September 1, 2007.