86 The later earnings addition.N.I.
(1)For the purposes of this Chapter “the later earnings addition” means the amount (if any) by which the assumed later unguaranteed element exceeds the unguaranteed element.
(2)In subsection (1)—
(a)“the unguaranteed element” means the amount by which the relevant sum exceeds the earner’s guaranteed minimum on the day after his cessation date or, in the case of a widow’s or widower’s pension, one half of that minimum; and
(b)“the assumed later unguaranteed element” means the amount by which the relevant sum would exceed the earner’s guaranteed minimum (or, in the case of a widow’s or widower’s pension, one half of that minimum) on the assumptions mentioned in subsection (3).
(3)The assumptions mentioned in subsection (2) are—
(a)that the relevant sum were calculated on the basis that the weekly rate of the pension or benefit which determines that sum had been calculated by reference to the level of earnings by reference to which that rate would have been calculated if the earner’s cessation date had fallen on the earlier of—
(i)the earner’s commencement of payment date, or
(ii)the date on which the earner ceased to be in pensionable service under the scheme; and
(b)that the earner’s guaranteed minimum were such sum as bears the same proportion to the assumed later unguaranteed element as the guaranteed minimum mentioned in subsection (2)(a) bears to the unguaranteed element.