C20.—(1) Where a member—
(a)is making additional periodical payments by virtue of having made an election under regulation C9(1), C13 or C14, and
(b)gives notification in accordance with regulation B12 (leaving the Scheme),
then—
(i)no further additional periodical payments shall be payable from the day on which he ceases to be a member; and
(ii)the benefits to which he is entitled in relation to those payments shall be calculated in accordance with regulation C19(7) and (8) as if the payments had been discontinued under regulation C18.
(2) Paragraph (1) shall not preclude a person who has elected under regulation B12 making a further election under regulation C9(1), C13 or C14 after again becoming a member.