Tex. Est. Code § 251.051
Except as otherwise provided by law, a will must be:
(2) signed by:
(B) another person on behalf of the testator:
Added by Acts 2009, 81st Leg., R.S., Ch. 680 (H.B. 2502), Sec. 1, eff. January 1, 2014.
Acts 2017, 85th Leg., R.S., Ch. 844 (H.B. 2271), Sec. 15, eff. September 1, 2017.