4.—(1) The Department must not accept an additional pension election or a faster accrual election in relation to a member (P) at any time if—
(a)the Department has accepted a buy-out election from P; and
(b)the buy-out value at that time exceeds the overall amount of extra pension at that time.
(2) The Department must not accept an additional pension election or a faster accrual election that would result in the amount of extra pension exceeding the overall amount of extra pension.