5. Where an employee ceases to be a member of the plan and elects to transfer the actuarial value of the pension in accordance with section 16 of the basic Order in Council, any amount of supplementary benefit granted under this Order in Council is payable to the employee from the date on which a deferred pension would otherwise have been payable to the employee under the basic Order in Council if the employee had not made that election. The amount of the supplementary benefit is reduced, where applicable, in accordance with the provisions of the second paragraph of section 15 of the basic Order in Council, with the necessary modifications.