International Tax Agreements Act 1953
(a) an enterprise of a territory participates directly or indirectly in the management, control or capital of an enterprise of the other territory; or
(b) the same persons participate directly or indirectly in the management, control or capital of an enterprise of a territory and an enterprise of the other territory,
and in either case conditions operate between the two enterprises in their commercial or financial relations which differ from those which might be expected to operate between independent enterprises dealing wholly independently with one another, then any profits which, but for those conditions, might have been expected to accrue to one of the enterprises, but, by reason of those conditions, have not so accrued, may be included in the profits of that enterprise and taxed accordingly.2.
Nothing in this Article shall affect the application of any law of a territory relating to the determination of the tax liability of a person, including determinations in cases where the information available to the competent authority of that territory is inadequate to determine the profits to be attributed to an enterprise, provided that that law shall be applied, so far as it is practicable to do so, consistently with the principles of this Article. 3.
Where profits on which an enterprise of a territory has been charged to tax in that territory are also included, by virtue of the provisions of paragraph 1 or 2, in the profits of an enterprise of the other territory and charged to tax in that other territory, and the profits so included are profits which might have been expected to have accrued to that enterprise of the other territory if the conditions operative between the enterprises had been those which might have been expected to have operated between independent enterprises dealing wholly independently with one another, then the first-mentioned territory shall make an appropriate adjustment to the amount of tax charged on those profits in the first-mentioned territory. In determining such an adjustment, due regard shall be had to the other provisions of this Agreement and for this purpose the competent authorities shall if necessary consult each other.