18Treatment of insignificant amounts
(1)Where an amount is required to be calculated in accordance with the provisions of sections 14(7), 15(1) or 17(2), (3) or (4) and, apart from this subsection, the amount so calculated is less than 0.5p, then, notwithstanding any other provision of this Act, that amount shall be taken to be zero, and other amounts so calculated shall be rounded to the nearest whole penny, taking 0.5p as nearest to the next whole penny above.
(2)Where a guaranteed minimum pension is attributable in part to earnings factors for the period before the tax year 1988-89 and in part to earnings factors for that tax year or for that tax year and subsequent tax years, the pension shall be calculated by—
(a)applying subsection (1) separately to the amount attributable to the period before the tax year 1988-89 and to the amount attributable to that and subsequent tax years, and
(b)aggregating the two amounts so calculated.