Tex. Transp. Code § 431.110
Any competitive bidding requirement or restriction on a local government that created a local government corporation does not apply to an expenditure by the local government corporation for:
(1) an improvement:
Added by Acts 2007, 80th Leg., R.S., Ch. 1213 (H.B. 1886), Sec. 16, eff. September 1, 2007.