Texas Special District Local Laws Code - SDLL § 9011.256. Tax and Rate Requirements

(a) If the district issues bonds payable wholly or partly from ad valorem taxes, the board shall impose a tax sufficient to pay the bonds and the interest on the bonds as the bonds and interest become due. The board may adopt the rate of the tax after considering the money received from pledged revenue available for payment of principal and interest to the extent and in the manner permitted by the resolution authorizing the issuance of the bonds.

(b) If the district issues bonds payable wholly or partly from revenue, the board shall set and revise the rates of compensation for the use of the systems and services rendered by the district.

(c) For bonds payable wholly from revenue, the rates of compensation must be sufficient to:

(d) For bonds payable partly from revenue, the rates of compensation must be sufficient to assure compliance with the resolution authorizing the issuance of the bonds or with the trust indenture.