R-12.1, r. 1 - Regulation under the Act respecting the Pension Plan of Management Personnel
10.0.1. For the purposes of section 136 of the Act, the agreement between the employee and the employer becomes void by reason of any of the following circumstances:
(1) the time worked is less than 40% of the regular time of a full-time employee holding such a position;
(2) the employee voluntarily ceases to participate in this plan during the first year of participation in the agreement;
(3) an employee eligible for a pension does not cease participating in this plan on the expiry of the period agreed upon.