Tex. Transportation Code § 431.033: EXEMPTION FROM TAXATION.

A corporation affects all the people in its area by assuming to a material extent what otherwise might be an obligation or duty of the commission and is a purely public charity under Section 2, Article VIII, Texas Constitution. However, a corporation is exempt from the franchise tax under Chapter 171, Tax Code, only if the corporation is exempted by that chapter.

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.