Tex. Occ. Code § 1101.561
(b) A broker must agree to act as an intermediary under this subchapter if the broker agrees to represent in a transaction:
Added by Acts 2001, 77th Leg., ch. 1421, Sec. 2, eff. June 1, 2003.
Acts 2005, 79th Leg., Ch. 825 (S.B. 810), Sec. 8, eff. September 1, 2005.