31(1)The amounts to be shown for any financial year under paragraphs 22, 28 and 29 are the sums receivable in respect of that year (whenever paid) or, in the case of sums not receivable in respect of a period, the sums paid during that year.
(2)But where—
(a)any sums are not shown in a note to the accounts for the relevant financial year on the ground that the person receiving them is liable to account for them as mentioned in paragraph 30(2), but the liability is thereafter wholly or partly released or is not enforced within a period of 2 years; or
(b)any sums paid by way of expenses allowance are charged to United Kingdom income tax after the end of the relevant financial year,
those sums shall, to the extent to which the liability is released or not enforced or they are charged as mentioned above (as the case may be), be shown in a note to the first accounts in which it is practicable to show them and shall be distinguished from the amounts to be shown apart from this provision.