C5. An opted-out member may apply to rejoin the Scheme as a participating member as from the date of any election at which he was elected to membership of the Parliament (“the effective opt-in date”) by giving notice in writing to the Parliamentary corporation within a period of three months beginning with the effective opt-in date:
Provided that–
(a)he pays to the Parliamentary corporation within 28 days of its acceptance of his application, or within such longer period as it may determine, the sum certified by it as being the amount which would have been deducted from his member’s salary under article D1 between the effective opt-in date and the first date thereafter when a deduction from that salary under article D1 is made; and
(b)at the effective opt-in date, at least three months had elapsed since he was last elected to membership of the Parliament.