Tex. Loc. Gov't Code § 505.302
The proceeds of the sales and use tax imposed under this chapter may be used to:
(2) pay the principal of, interest on, and other costs relating to bonds or other obligations issued by the Type B corporation to:
Added by Acts 2007, 80th Leg., R.S., Ch. 885 (H.B. 2278), Sec. 3.01, eff. April 1, 2009.