1. Where a parent company or its permanent establishment, by virtue of the association of the parent company with its subsidiary, receives distributed profits, the Member State of the parent company and the Member State of its permanent establishment shall, except when the subsidiary is liquidated, either:

(a) refrain from taxing such profits to the extent that such profits are not deductible by the subsidiary, and tax such profits to the extent that such profits are deductible by the subsidiary; or

(b) tax such profits while authorising the parent company and the permanent establishment to deduct from the amount of tax due that fraction of the corporation tax related to those profits and paid by the subsidiary and any lower-tier subsidiary, subject to the condition that at each tier a company and its lower-tier subsidiary fall within the definitions laid down in Article 2 and meet the requirements provided for in Article 3, up to the limit of the amount of the corresponding tax due.