Article 12

The Organization shall have relief, under arrangements made by the Commissioners of Customs and Excise, by way of refund of customs duty paid on any hydrocarbon oil (within the meaning of the Hydrocarbon Oil (Customs and Excise) Act 1971) which is bought in the United Kingdom and necessary for the exercise of the official activities of the Organization, such relief to be subject to compliance with such conditions as may be imposed in accordance with the arrangements.