(1) Where a non-resident person is chargeable to income tax in the name of any branch, manager, agent, factor or receiver in respect of any profits or gains arising from the sale of goods or produce manufactured or produced outside the State by the non-resident person, the person in whose name the non-resident person is so chargeable may, if that person thinks fit, apply to the inspector to have the assessment to income tax in respect of those profits or gains made or amended, as the case may be, on the basis of the profits or gains that might reasonably be expected to have been earned or made by -
(a) a merchant, or
(b) where the goods are retailed by or on behalf of the manufacturer or producer, a retailer of the goods sold,
who had bought direct from the manufacturer or producer and, on proving the amount of the profits or gains on that basis to the satisfaction of the inspector, the inspector shall make or amend the assessment accordingly.
(2) A resident person or a non-resident pe
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