(1) For the purposes of determining whether and to what extent -
(a) in relation to any claim under section 372AP(2), eligible expenditure incurred on or in relation to a qualifying premises or a special qualifying premises, and
(b) in relation to any claim under section 372AR(1), qualifying expenditure incurred on or in relation to a qualifying premises,
is incurred or not incurred during the qualifying period, only such an amount of that expenditure as is properly attributable to work on -
(i) in the case of a claim under section 372AP(2), the construction of, conversion into, or refurbishment of, the qualifying premises or, as the case may be, the refurbishment of the special qualifying premises, and
(ii) in the case of a claim under section 372AR(1), the construction of, conversion into, or refurbishment of the qualifying premises,
actually carried out during the qualifying period shall be treated as having been incurred during that period.
(a) Where a person incurs eligible e
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