(a) The board shall impose an ad valorem tax at a rate sufficient to create an interest and sinking fund to pay the principal of and interest on general obligation bonds issued by the district under Section 1043.201 as the bonds mature.
(b) The tax required by this section together with any other ad valorem tax the district imposes may not in any year exceed:
(1) 25 cents on each $100 valuation of all taxable property in the district; or
(2) the maximum tax rate approved under Section 1043.253, which may not exceed 75 cents on each $100 valuation of all taxable property in the district.