12. Notwithstanding section 5, where an employee contributing to the Civil Service Superannuation Plan ceases, after June 30 1973, to hold an employment to which such plan is applicable to become, within 180 days, a teacher governed by the Act respecting the Teachers Pension Plan, he may elect for the latter plan, on taking up his new position, by giving a notice to that effect to the Commission within sixty days of taking up his new position.
In the case where the employee does not make the election provided for in the first paragraph, he is entitled to be credited, by virtue of this plan, with the years of service with which he is entitled to be credited under the Act respecting the Civil Service Superannuation Plan, provided that his contributions have not been reimbursed to him. The benefits in respect of such transferred years of service are those which are provided for in section 90 of this act.
The employee’s contributions prior to the date on which he begins to contribute to this plan do not bear interest.