Paragraph 3
The net premium shall be a sum equal to 82½ per cent of the gross premium, except that—
(a)
in relation to an industrial assurance contract, where the said sum is not a multiple of one halfpenny, it shall be rounded off to the nearer halfpenny, or, if the said sum is a multiple of one half of one halfpenny, to the nearer penny; and
(b)
in relation to a collecting society contract, where the said sum is not a multiple of one penny, it shall be rounded off to the nearer penny, or, if the said sum is a multiple of one halfpenny, to the nearer even penny.