Shall the Fort Lewis Mesa Fire Protection District be authorized to adjust its current and all future mill levies, (including the additional 2.5 mills if the voters approve ballot question 6B, if, on or after January 1, 2019, there are changes in the method of calculating Assessed Valuation, including a change in the percentage of Actual Valuation used to determine Assessed Valuation, so that, to the extent possible, the actual tax revenues generated by such mill levies are not less than the actual tax revenues that would have been generated had such changes not occurred?