Texas Water Code Sec. § 63.281 Bond Tax (a) After bonds have been voted, the commission shall levy and have assessed and collected improvement taxes on all taxable property inside the district. (b) The tax shall be in an amount which is sufficient to pay the principal of and interest on the bonds. Acts 1971, 62nd Leg., p. 110, ch. 58, Sec. 1, eff. Aug. 30, 1971.