5. For the purposes of regulation 4, the Comptroller shall determine –
(a)
the income chargeable to tax at the rate of 10% of a company derived from the operation of its approved Finance and Treasury Centre having regard to such expenses, capital allowances and donations allowable under the Act as are, in his opinion, to be deducted in ascertaining such income; and
(b)
the manner and extent to which any losses arising from the qualifying services and qualifying activities approved under section 43G(2) of the Act may be deducted under section 37 of the Act in ascertaining the chargeable income of a company derived from the operation of its approved Finance and Treasury Centre.