5. The by-law may provide for the upward adjustment of the remuneration, where applicable, for each fiscal year from the year commencing after its coming into force.
The adjustment shall consist in increasing, for each fiscal year, the amount applicable for the preceding year by a percentage, of not over 6 %, corresponding to the rate of increase in the Consumer Price Index for Canada established by Statistics Canada.
Where the product of the computation provided for in the second paragraph is not a multiple of 10, it shall be rounded off to the nearest multiple of 10.
The rate of increase in the index referred to in the second paragraph is established by
(1) subtracting from the index established for the month of December immediately preceding the fiscal year considered the index established for the month of December of the year before; and
(2) dividing the difference obtained under subparagraph 1 by the index established for the month of December of the year before.
Every year, the Minister of Municipal Affairs shall publish in the Gazette officielle du Québec a notice setting forth the percentage corresponding to the rate of increase in the index computed in accordance with the fourth paragraph and indicating whether the adjustment of the remuneration for the fiscal year considered, where prescribed by by-law of the council, shall be based on that percentage or 6 %, as the case may be.