22A.—(1) Where for any year of assessment the allowances consist of allowances a person is entitled to or allowances made to a person under section 16, 17, 18A (repealed), 18B, 18C, 19, 19A, 19B, 19C, 19D or 20 for that year of assessment and any previous year of assessment added to and deemed to form part of the corresponding allowance for the year of assessment under section 23(1), the allowances are to be deducted in the following order:
(a)
firstly, any balance of allowance from any previous year of assessment added to and deemed to form part of the corresponding allowance for the year of assessment under section 23(1); and
(b)
secondly, any allowance for that year of assessment falling to be made under section 16, 17, 18A (repealed), 18B, 18C, 19, 19A, 19B, 19C, 19D or 20.
(2) For the purposes of subsection (1)(a), the balance of allowance for the earliest year of assessment is deemed to have been deducted first, followed by the balance of allowance for the next earliest year of assessment, and so on.