21. For the purposes of sections 18 and 20, the amount of pension that would be obtained on the basis of the sums awarded to the spouse at the date of assessment is established at that date according to the actuarial method and assumptions in section 8. That amount is presumed applicable on the date of the judge’s or former judge’s 65th birthday where Part V.1 or VI of the Act applies or on the date of the 70th birthday where Part VI.1 of the Act applies or where the benefit accrued under the pension plan provided for in Part VI of the Act was deemed to correspond to a deferred pension at 70 years of age.
If the pensioner is under 65 years of age, or 70 years of age, as the case may be, on the date on which the annual pension becomes payable, or on the date of payment if the pension is being paid at that date, the amount of pension obtained pursuant to the first paragraph is reduced by 0.50% per month, computed for each month between the date on which that amount of pension begins to apply and the date of the pensioner’s 65th or 70th birthday, as the case may be, without exceeding 65%.
If the pensioner retired before the date of payment and if that date occurs after the date of the pensioner’s 65th birthday or 70th birthday, as the case may be, the amount of pension obtained pursuant to the first paragraph is increased by 0.50% per month, computed for each month between the date of the pensioner’s 65th or 70th birthday and the date on which that amount of pension begins to apply, if the pensioner retired before the date of the pensioner’s 65th or 70th birthday, as the case may be, or for each month between the date on which the pensioner retired and the date on which that amount of pension begins to apply, if the pensioner retired on the date of the pensioner’s 65th or 70th birthday, as the case may be, or thereafter.