13. For paragraph (6) of regulation 73 (Part payment for additional service or unreduced retirement lump sum), substitute—
“(6) If the member becomes entitled to receive benefits before the chosen date under regulation 72(3), the proportion of additional service or unreduced retirement lump sum to be credited to the member will be—
(a)calculated as described in paragraph (5), and
(b)then reduced by reason of the early payment of the pension and the lump sum by such amounts as the Department, after taking the advice of the Scheme Actuary, shall determine.”.