(a) Subject to the exemptions provided for in this article, the tax is imposed on net gallons of motor fuel according to Section 40-17-326 at the following rates:
(1) Eighteen cents ($.18) per gallon on gasoline, which is comprised of a seven cents ($.07) excise tax, a supplemental five cents ($.05) excise tax, and an additional six cent ($.06) excise tax.
(2) Nineteen cents ($.19) per gallon on diesel fuel, comprised of a thirteen cents ($.13) excise tax and an additional six cents ($.06) excise tax.
(3) Nine and one-half cents per gallon ($.095) on aviation gasoline and three and one-half cents per gallon ($.035) on aviation jet fuel when the aviation fuel is sold to a licensed aviation fuel purchaser. Aviation gasoline is to be taxed as gasoline and aviation jet fuel is to be taxed as diesel fuel when not sold to a licensed aviation fuel purchaser.
(b) The motor fuel subject to the excise tax levied by this section shall not be subject to any other excise tax levied by this state.
However, the payment of the motor fuel excise tax levied by this section shall not exempt the seller or importer of fuel from the license fees levied by Section 40-17-174.