(1) In this section -

'conversion', in relation to a building or structure, means any work of conversion, reconstruction or renewal, into a building suitable for use for the purposes of the retailing of goods or the provision of services only within the State and includes the provision or improvement of water, sewerage or heating facilities carried out, or maintenance in the nature of repair;

'qualifying expenditure', means, notwithstanding section 279, capital expenditure incurred in the qualifying period on the conversion or the refurbishment of a qualifying premises after deducting from that amount of expenditure any sum in respect of or by reference to -

(a) that expenditure,

(b) the qualifying premises, or

(c) the conversion work, or as the case may be, the refurbishment work in respect of which that expenditure was incurred,

which the person has received or is entitled to receive, directly or indirectly, from the State, any board established by statute or any public or local authority, and for the purposes of giving relief under this section, any reference to expenditure being incurred shall include a reference to expenditure deemed under any provision of Part 9 to be incurred;