The net cost to a person of the demolition of an asset representing qualifying expenditure shall, for the purposes of this Chapter, be added to that qualifying expenditure in determining the amount of any balancing allowance or balancing charge for the chargeable period related to the demolition of the asset.

The cost or net cost to a person of the demolition of any asset shall not, if subsection (1) above applies to it, be treated for the purposes of this Part as expenditure incurred in respect of any other asset by which that asset is replaced.

Any reference in this section to the net cost of the demolition of any asset is a reference to the excess (if any) of the cost of the demolition over any moneys received for the remains of the asset.