(a) If the district adopts the tax, a tax is imposed on the receipts from the sale at retail of taxable items in the district at the rate approved at the election.
(b) There is also imposed an excise tax on the use, storage, or other consumption in the district of tangible personal property purchased, leased, or rented from a retailer during the period that the tax is effective in the district. The rate of the excise tax is the same as the rate of the sales tax portion of the tax and is applied to the sale price of the tangible personal property.