15. The difference between the variation in the values entered on a roll resulting from an equilibration for the immovables in the category determined in accordance with the second paragraph that were the subject of a sale and the variation in the values entered on the roll for all the immovables in the category shall be less than 10%.
The category of immovables used for the purposes of the first paragraph shall be that which has been the subject of the greatest number of sales used for the purposes of calculating the median proportion of the roll for the fiscal period during which it comes into force, of all the categories comprising taxable immovables listed on the form appearing in Part 4C of the Manual under the following headings, each of which represents a category:(1) “10 — Logements/Nombre: 1 (condominium)”;
(2) “10 — Logements/Nombre: 1 (sauf condominium)”;
(3) “10 — Logements/Nombre: 2”; and
(4) “11 — Chalets, maisons de villégiature”.
The variation in the values entered for the immovables in the category that were the subject of a sale is obtained by carrying out the following operations consecutively:(1) establishing the average of the values entered on the roll referred to in the first paragraph, upon the deposit of the roll, for the immovables in the category that were the subject of a sale used for the purposes of calculating the median proportion of the roll for the fiscal period during which it comes into force;
(2) establishing the average of the values entered on the preceding roll, upon the deposit of the roll, for the immovables referred to in subparagraph 1;
(3) subtracting the average established in accordance with subparagraph 2 from that established in accordance with subparagraph 1; and
(4) dividing the difference established in accordance with subparagraph 3 by the average established in accordance with subparagraph 2. The quotient obtained shall comprise 2 decimal places and shall be converted into a percentage.
The variation in the values entered for all the immovables in the category shall be obtained by carrying out the operations provided for in the third paragraph in respect of the values entered for all of those immovables according to the summaries of the state of the roll referred to in the first paragraph and of the preceding roll on their respective dates of deposit.
In establishing the difference between the variation established in accordance with the third paragraph and that established in accordance with the fourth paragraph, the numbers representing the variations shall be used without taking into account the fact that such numbers are percentages. If the numbers are positive numbers, the lowest shall be subtracted from the highest; if the numbers are negative numbers, they shall be converted into positive numbers and the lowest shall be subtracted from the highest; if there is one positive number and one negative number, the second shall be converted into a positive number and the 2 numbers shall be added together. The result of the subtraction or addition is a percentage.
The obligation provided for in the first paragraph does not apply where, in the base list of sales drawn up for the purposes of calculating the median proportion of the roll referred to in that paragraph for the fiscal period during which it comes into force, the number of sales of immovables belonging to each category defined in the second paragraph is less than 30.
M.O. 94-09-01, s. 15; M.O. 2000-06-14, s. 6; M.O. 2010-07-20, s. 6.