5.3. If the municipality avails itself of the power provided for in section 253.27 of the Act in respect of its current roll, the operations provided for in the second and third paragraphs are performed to adjust the divisor applicable under the second paragraph of section 5 for the purposes of establishing the weighted aggregate taxation rate for either of the first 2 fiscal years to which the current roll applies. The operations vary depending on whether the product calculated under that paragraph is greater than 1 or not.
The first operation consists, in the first case, in subtracting 1 from the product and, in the second case, in subtracting the product from 1.
The second operation consists, in the first case, in adding to 1 and, in the second case, in subtracting from 1, the number corresponding to one third or two thirds, depending on whether the fiscal year for which the weighted aggregate taxation rate is the first or the second to which the current roll applies, of the difference resulting from the subtraction provided for in the second paragraph.
Where the current roll in respect of which the municipality avails itself of the power provided for in section 253.27 of the Act does apply only to 2 fiscal years, an adjusted divisor is calculated only for the first fiscal year. To that end, for the purposes of the third paragraph, half the difference resulting from the subtraction provided for in the second paragraph is taken into account instead of one third or two thirds.