If an amount received or receivable in respect of the destruction of property relates to both the part of * your area for which you are claiming the balancing deduction and to property:
(a) the cost of which did not form part of * your construction expenditure; or
(b) that is capital works that was not part of your area;
you must apportion the amount received or receivable to the amount that is attributable to the part of your area that was destroyed. The apportionment must be reasonable.