STEP ONE: Determine the total amount of base revenue for all taxing units using the base revenue determined for each taxing unit under section 19 of this chapter.
STEP TWO: Determine the sum of registration fees paid and collected under IC 9-29-5 (before its expiration) or IC 9-18.1 to register vehicles to which this chapter applies during the state fiscal year that ends June 30 immediately preceding the calendar year for which the tax is first due and payable, excluding:
during the state fiscal year.
STEP THREE: Determine the tax factor by dividing the STEP ONE result by the STEP TWO result.
IC 6-6-5.5-7