(a) General. — All sales of motor fuel and alternative fuel subject to the flat rate of the tax imposed by section five, article fourteen-c of this chapter, are subject to the tax imposed by this article and comprises the variable component of the tax imposed by section five, article fourteen-c of this chapter and is collected and remitted at the time the tax imposed by said section is remitted. Sales of motor fuel and alternative fuel upon which the tax imposed by this article has been paid is not again taxed under the provisions of this article. This section means that all gallons of motor fuel and equivalent gallons of alternative fuel sold and delivered or delivered in this state are taxed one time.
(b) Measure of tax. — The measure of tax imposed by this article is as follows:
(1) On sales of motor fuel, the average wholesale price as defined and determined in section five, article fourteen-c of this chapter. For purposes of maintaining revenue for highways, and recognizing that the tax imposed by this article is generally imposed on gross proceeds from sales to ultimate consumers, whereas the tax on motor fuel herein is imposed on the average wholesale price of the motor fuel; in no case, for the purposes of taxation under this article, may the average wholesale price be determined to be less than 97 cents per gallon of motor fuel for all gallons of motor fuel sold during the reporting period, notwithstanding any provision of this article to the contrary. On and after January 1, 2010, for the purpose of taxation under this article, in no case may the average wholesale price be determined to be less than $2.34 per gallon of motor fuel for all gallons of motor fuel sold during the reporting period notwithstanding any provision of this article to the contrary: Provided, That on and after July 1, 2017, in no case may the average wholesale price be determined to be less than $3.04 per gallon of motor fuel for all gallons of motor fuel sold during the reporting period notwithstanding any provision of this article to the contrary and on and after July 1, 2017, the tax per gallon may not be less than 15.2 cents per gallon of motor fuel. Any limitation on the average wholesale price of motor fuel contained in this subsection shall not be applicable to alternative fuel.