31. The periodical payment period—
(a)begins with,
(i)if the member exercises the option within 3 months after joining this scheme, the first appropriate pay period beginning on or after the date on which the scheme manager receives the option notice; or
(ii)in any other case, the first appropriate pay period of the scheme year beginning on or after the date on which the scheme manager receives the option notice; and
(b)ends on the earlier of,
(i)the date on which the member ceases to be in pensionable service in the eligible employment to which the option relates; and
(ii)the date on which the member reaches the effective pension age.