48. The second paragraph of section 42 and sections 44 to 46 apply only if, on 26 June 1986 or, as regards section 45, on the date on which the amount becomes payable, the amount computed under those sections is greater than the amount that was payable on 25 June 1986 or, as the case may be, on the date on which it becomes payable under the Act respecting pension coverage for certain teachers (chapter P-32.1). However, the amount computed under those sections and the reduction prescribed in sections 24 and 26 shall be adjusted, if applicable, in accordance with the criteria established by regulation under section 20 of the Act respecting pension coverage for certain teachers.