10.—(1) If after a retiring employee has delivered a declaration the rate of his retirement pension is increased, otherwise than under the Pensions (Increase) Act (Northern Ireland) 1971(), the part allocated is correspondingly increased.
(2) Sub-paragraph (1) applies even if the increase in the retirement pension takes effect from a date earlier than the date of delivery of the declaration.
(3) The corresponding increase in the part allocated, which shall be rounded down to the nearest pound, takes effect from the same date as the increase in the retirement pension.
(4) If the alternative benefit is the one described in regulation E11(2)(b) (annuity for declarant followed by annuity for surviving spouse), the resulting increase in the first of those annuities takes effect from the same date as the increase in the retirement pension.