Tex. Gov't Code § 815.004
(a) Before taking office as a member of the board of trustees, a person shall subscribe to the following oath of office:
I do solemnly swear that I will, to the best of my ability, discharge the duties of a trustee of the employees retirement system, that I will diligently and honestly administer the affairs of the board of trustees of the retirement system, and that I will not knowingly violate or willingly permit to be violated any of the laws applicable to the retirement system.
Acts 1981, 67th Leg., p. 1876, ch. 453, Sec. 1, eff. Sept. 1, 1981. Renumbered from Vernon's Ann.Civ.St. Title 110B, Sec. 25.004 by Acts 1989, 71st Leg., ch. 179, Sec. 1, eff. Sept. 1, 1989.