Article 14
Except in so far as in any particular case any privilege or immunity is waived by the Secretary-General acting on behalf of the Organisation, experts, other than any persons referred to in Article 12 or 13 of this Order, employed on missions on behalf of the Organisation shall so far as is necessary for the effective exercise of their functions while present in the United Kingdom for the discharge of their duties, enjoy:—
The like immunity from personal arrest or detention and from seizure of their personal baggage as is accorded to an envoy of a foreign sovereign Power accredited to Her Majesty;
The like immunity from suit and legal process in respect of words spoken or written or acts done by them in the course of the performance of their official duties as is accorded to an envoy of a foreign sovereign Power accredited to Her Majesty;
The like inviolability for all papers and documents, relating to the work on which they are engaged for the Organisation, as is accorded to an envoy of a foreign sovereign Power accredited to Her Majesty.
Provided that, if any such expert is a citizen of the United Kingdom and Colonies, he shall not enjoy any immunity under paragraph (a) of this Article.