If:
(a) instead of a pension under Division 3 of this Part, a lump sum benefit is payable to the spouse of a deceased pensioner under section 95A or 96AA; and
(b) had the pension been payable to the spouse, extra spouse's pension would be payable to him or her under section 96B;
there is payable to the spouse, instead of that extra spouse's pension, a lump sum of an amount determined in writing by CSC after consultation with an actuary.