79. An active member shall, in each fiscal year of the plan, pay the member contribution that, when added to the employer contribution and to the contributions of the other active members, is equal to the current service contribution determined in accordance with sections 124 and 125 of the Act.
A member’s member contribution shall likewise include his share of any amortization amount determined in application of section 90 and of the sum payable to cover any amount determined pursuant to subparagraph 4 of the second paragraph of section 137 of the Act.
However, if the person or body who has the power to amend the plan so decides, the change in the member contribution related to an amortization amount determined in accordance with section 90 or in application of subparagraph 4 of the second paragraph of section 137 of the Act may be postponed, at the latest, to the date that is 12 months after the date of the actuarial valuation pertaining thereto. Where an increase is postponed, the sum of the contribution that would otherwise have been paid in the meanwhile, increased by the interest referred to in section 48 of the Act, may be divided uniformly over the remainder of the first 5 years which follow the valuation date.