53.—(1) An employing authority may resolve to increase a member's total membership.
(2) Such a resolution may only be passed before the expiry of the period of six months beginning with the day on which he becomes a member.
(3) The member must be aged less than 59 when he becomes a member.
(4) The resolution must specify the additional period of membership.
(5) That period must not exceed the maximum addition under Schedule 4.
(6) Where the employing authority have passed a resolution under paragraph (1) the additional period may be counted as part of the member's total membership.
(7) But if when the member leaves his employment with the employing authority no person becomes immediately entitled to a pension in respect of his membership the additional period may not be so counted.