Tex. Loc. Gov't Code § 252.061
If the contract is made without compliance with this chapter, it is void and the performance of the contract, including the payment of any money under the contract, may be enjoined by:
Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.
Acts 2009, 81st Leg., R.S., Ch. 979 (H.B. 3668), Sec. 1, eff. September 1, 2009.