4.—(1) Except in so far as in any particular case any privilege or immunity is waived by the Court sitting in plenary session, judges of the Court, the Registrar of the Court and, when he is acting as the Registrar, the Deputy Registrar of the Court shall enjoy:—
(a)unless they are British citizens, British Dependent Territories citizens, British Overseas citizens, British Nationals (Overseas) or permanently resident in the United Kingdom the like immunity from suit and legal process, the like inviolability of residence and the like exemption or relief from taxes, other than customs duties and taxes on the importation of goods, and rates as are accorded to or in respect of the head of a diplomatic mission;
(b)immunity from suit and legal process in respect of words spoken or written and things done or omitted to be done by them in their official capacity;
(c)exemption from income tax in respect of the salaries and emoluments received by them;
(d)the like exemption from duties and taxes on the importation of articles imported for their personal use, including articles intended for their establishment, as in accordance with paragraph 1 of Article 36 of the 1961 Convention Articles is accorded to a diplomatic agent;
(e)unless they are British citizens, British Dependent Territories citizens, British Overseas citizens, British Nationals (Overseas) or permanently resident in the United Kingdom the like exemption and privileges in respect of their personal baggage as in accordance with paragraph 2 of Article 36 of the 1961 Convention Articles are accorded to a diplomatic agent;
(f)unless they are British citizens, British Dependent Territories citizens, British Overseas citizens, British Nationals (Overseas) or permanently resident in the United Kingdom relief under arrangements made by the Commissioners of Customs and Excise, by way of refund of customs duty paid on imported hydrocarbon oil (within the meaning of the Hydrocarbon Oil Duties Act 1979(1)) or value added tax paid on the importation of such oil which is bought in the United Kingdom by or on their behalf, such relief to be subject to compliance with such conditions as may be imposed in accordance with the arrangements; and
(g)exemptions whereby, for the purposes of the enactments relating to national insurance and social security, including enactments in force in Northern Ireland,
(i)services rendered for the Court by them shall be deemed to be excepted from any class of employment in respect of which contributions or premiums under those enactments are payable, but
(ii)no person shall be rendered liable to pay any contribution or premium which he would not be required to pay if those services were not deemed to be so excepted.
(2) Paragraph 1(c) of this Article shall not apply to pensions or annuities paid by the Court.