(1) In calculating for the purposes of subsection (5) of section 46 the amount of the annual rate of the pension that, but for the death of a widow or widower, would, by virtue of subsection (1) of that section, have been payable to the widow or widower or have been so payable but for subsection (2) of that section, any amount by which that amount would have been increased or decreased by virtue of the operation of this Part shall be taken into account.
(2) In calculating for the purposes of subsection (5) of section 47 the amount of the annual rate of pension that, but for the death of a widow or widower, would, by virtue of subsection (1) of that section, have been payable to the widow or widower or have been so payable but for subsection (2) of that section, any amount by which that amount would have been increased or decreased by virtue of the operation of this Part shall be taken into account.
(3) In calculating for the purposes of subsection (2) of section 48 the amount of the annual rate of the pension that, but for the death or divorce of the wife or husband of a contributor or pensioner would, by virtue of subsection (1) of section 46, or subsection (1) of section 47, have been payable to the wife or husband or would have been so payable but for subsection (2) of section 46, or subsection (2) of section 47, any amount by which that amount would have been increased or decreased by virtue of the operation of this Part shall be taken into account.