Tex. Gov't Code § 815.006
(b) Notwithstanding Subchapter C of Chapter 659, subject to the approval of the board of trustees, trustees who are not contributing members of the retirement system may receive:
Acts 1981, 67th Leg., p. 1876, ch. 453, Sec. 1, eff. Sept. 1, 1981. Renumbered from Vernon's Ann.Civ.St. Title 110B, Sec. 25.006 by Acts 1989, 71st Leg., ch. 179, Sec. 1, eff. Sept. 1, 1989.
Amended by Acts 1995, 74th Leg., ch. 586, Sec. 25, eff. Aug. 28, 1995.