83. Except in the case of a defined contribution plan, every member whose member contributions, with accrued interest, exceed the limit set by section 60, or who is credited with voluntary additional contributions, is entitled, from the date on which a pension other than a pension provided for in section 67.2 begins to be paid to him under the pension plan, to purchase an additional pension with such excess amount or contributions and accrued interest.
The plan may, however, allow the member to choose between the additional pension purchased with his additional voluntary contributions and any other benefits of equal value determined by the plan.
1989, c. 38, s. 83; 2008, c. 21, s. 9.