Texas Transportation Code - TRANSP § 284.038. Revenue Bonds:  Ad Valorem Tax for Maintenance and Operation

(1) by the bond resolution, authorize the payment of the principal of and premium, if any, and interest on the bonds from the gross revenues of the project;  and

(2) impose a direct continuing ad valorem tax under Section 9, Article VIII, or Section 52, Article III, Texas Constitution, and pledge the tax to pay maintenance and operating expenses of the project and to establish and maintain a reserve fund and a depreciation and replacement fund for the project, as a supplement to the pledge of revenues for those purposes or in lieu of a pledge of revenues, as provided by the bond resolution.