53Power to make regulations.
The Commissioners of Inland Revenue may from time to time make regulations generally for carrying out the preceding provisions of this Part of this Act or any arrangements having effect thereunder and may, in particular, by those regulations provide—
(a)for securing that relief from taxation imposed by the laws of the territory to which any such arrangements relate does not enure to the benefit of persons not entitled thereto;
(b)for prescribing the principles upon which the net United Kingdom rate is to be determined for the purposes of the last preceding section; and
(c)for authorising, in cases where tax deductible from any periodical payment has, in order to comply with any such arrangements, not been deducted and it is discovered that the arrangements do not apply to that payment, the recovery of the tax by assessment on the person entitled to the payment or by deduction from subsequent payments.