To no longer impose the 6 percent sales tax on gasoline and diesel motor fuel sales, phased in over six years. House Bill 4317 would replace the current 19-cent per gallon gas tax and 15-cent diesel tax with a new tax based on the wholesale price of fuel, initially levied at a rate of 7.5 percent and rising to 13.5 percent over the same period. The two bills are “tie-barred,” meaning one cannot become law unless both do.   Official Text and Analysis.