IL HB3619

Creates a new "mid-range ethanol blend" definition as a blend of gasoline and denatured ethanol containing not less than 20% but less than 51% denatured ethanol.

Imposes tax on mid-range ethanol blends at 80% of proceeds for sales from July 1, 2019 through December 31, 2023, then at 100% of proceeds thereafter.

Modifies the definition of "gasohol" to reference the maximum proportion of ethanol authorized by the EPA under the Clean Air Act, rather than a fixed 10% ethanol requirement.

Changes the definition of "majority blended ethanol fuel" to contain not less than 51% and no more than 83% ethanol by volume, as specified in ASTM Standard DS798-11.

Applies these changes across the Use Tax Act, Service Use Tax Act, Service Occupation Tax Act, and Retailers' Occupation Tax Act, with immediate effectiveness.