Tex. Transp. Code § 228.108
(b) If the attorney general determines that the bonds, the bond proceedings, and any supporting contract are authorized by law, the attorney general shall approve the bonds and deliver to the comptroller:
(d) After approval by the attorney general, the bonds, the bond proceedings, and any supporting contract are valid, enforceable, and incontestable in any court or other forum for any reason and are binding obligations according to their terms for all purposes.
Transferred from Transportation Code, Section 361.1753 and amended by Acts 2005, 79th Leg., Ch. 281 (H.B. 2702), Sec. 2.42, eff. June 14, 2005.
Added by Acts 2003, 78th Leg., ch. 1325, Sec. 15.27, eff. June 21, 2003.