21.2(1)The amount of the annual pension to which a person who ceases to be a member on or after April 1, 2008, is entitled under section 10, when combined with the amount of the supplementary allowance to which the person is entitled under section 21.1 or subsection 22(1.1) or the amount of the reduced supplementary allowance to which the person is entitled under subsection 22(1.2), shall not be less than the amount of the annual pension to which the person would have been entitled under section 10 when combined with the amount of the supplementary allowance to which the person would have been entitled under section 21 or the amount of the reduced supplementary allowance to which the person would have been entitled under subsection 22(1), if the person had ceased to be a member before April 1, 2008, having the same period of pensionable service to his or her credit.