(a) At the time general obligation bonds are issued under Section 1085.201, the board shall impose an ad valorem tax at a rate sufficient to create an interest and sinking fund and to pay the principal of and interest on the bonds 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 the lesser of:
(1) the maximum tax rate approved by district voters; or
(2) 75 cents on each $100 valuation of all taxable property in the district.