19. In the case of female members who elected to buy increased widower's pension under regulation G9 (increased widower's pension) that regulation is modified so that the lump sum payable on the member's retirement will be reduced in respect of each year of practitioner service that the member buys, by 2.8 per cent of uprated earnings for each complete year before 25th March 1972, and by 1.4 per cent of uprated earnings for each complete year after 24th March 1972 and before 6th April 1988, plus, in each case, the relevant daily proportion for each additional day.