Tex. Gov't Code § 1508.203
(a) Certificates of indebtedness issued under this subchapter may be secured by and made payable from:
(b) To secure the repayment of certificates of indebtedness issued under this subchapter or bonds issued to refund certificates of indebtedness issued under this subchapter, the governing body of a municipality may:
Added by Acts 1999, 76th Leg., ch. 227, Sec. 1, eff. Sept. 1, 1999.