Sec. 457.255.  INCONTESTABILITY.  Bonds are incontestable after they are:
(1)  approved by the attorney general;
(2)  registered by the comptroller;  and
(3)  sold and delivered to the purchaser.
Added by Acts 1997, 75th Leg., ch. 165, Sec. 30.35(a), eff. Sept. 1, 1997.