Old Age Security Act — O-9 12
 the second adjustment quarter that relates to that subsequent payment quarter. Guaranteed minimum income for pensioners (5) Despite subsection (2), the amount of the supplement that may be paid to a pensioner for any month after December 1997 is the amount determined by the formula [(A - B) × C] - D/2 where A is the aggregate of (a) the maximum amount of the supplement that, but for this subsection, might have been paid to the pensioner for that month, and (b) the amount of the full monthly pension; B is the pensioner’s monthly pension; C is the pensioner’s special qualifying factor for the month; and D is the pensioner’s monthly base income rounded, where it is not a multiple of two dollars, to the next lower multiple of two dollars. Enhancement of supplement for certain married pensioners (5.1) Where the aggregate of the pensions and supplements payable for a month to two pensioners each of whom is the other’s spouse or common-law partner is less than the aggregate of the pension and supplement that would be payable for that month to one of them if the other were not a pensioner, the Minister may, notwithstanding subsection (2), pay to one of them for that month (a) the amount of supplement that would be payable for that month to that pensioner, if the other were not a pensioner, minus (b) the aggregate of the pension and supplement payable for that month to the other. Definition of monthly base income (6) In this section, monthly base income means, in relation to the calculation of the supplement for a month in any given payment quarter, (a) in the case of a person other than an applicant described in paragraph (b) or (c), one-twelfth of the income of that person for the base calendar year; (b) in the case of an applicant who, on the day immediately before the current payment period, was the spouse or common-law partner of a person to whom no pension may be paid for any month in the current payment period, the amount determined by the formula A/24 - B/2 where A is the aggregate of the incomes of the applicant and the spouse or common-law partner for the base calendar year, and B is the product (i) obtained by multiplying the amount of the full monthly pension, calculated without regard to subsection 7(5), that might have been paid to a pensioner for any month by the applicant’s special qualifying factor for the month, and (ii) rounded, if that product is not a multiple of four dollars, to the next higher multiple of four dollars; and (c) in the case of an applicant who, on the day immediately before the current payment period, was the spouse or common-law partner of a person to whom a pension may be paid for any month in the payment period, (i) in respect of any month in the current payment period before the first month for which a pension may be paid to the spouse or common-law partner, the amount determined for the applicant for the month under paragraph (b), and (ii) in respect of any month in that payment period commencing with the first month for which a pension may be paid to the spouse or common-law partner, one twenty-fourth of the aggregate of the incomes of the applicant and the spouse or common-law partner for the base calendar year. R.S., 1985, c. O-9, s. 12; 1996, c. 18, s. 52; 1998, c. 21, ss. 108, 119; 1999, c. 22, s. 88; 2000, c. 12, s. 207; 2005, c. 30, s. 136 2021, c. 23, s. 273