Article 15 Staff Members
Except in so far as in any particular case any privilege or immunity is waived by the Director of the Organisation or, in the case of the Director, by the Council of the Organisation, all staff members shall enjoy—
immunity from suit and legal process (even after they have left the service of the Organisation) in respect of acts, including words written or spoken, done by them in the exercise of their function, except in respect of damage caused by a vehicle or other means of transport belonging to or driven by a staff member or in respect of a traffic offence committed by him;
unless they are United Kingdom nationals or permanently resident in the United Kingdom, the like exemption from duties (whether of customs or excise) and taxes on the importation of furniture and personal effects (including one motor car each) which—
at or about the time when they first enter the United Kingdom to take up their posts as staff members of the Organisation are imported for their personal use, and
are articles which were in their ownership and possession or which they were under contract to purchase, immediately before they so entered the United Kingdom,
as in accordance with paragraph 1 of Article 36 of the 1961 Convention Articles is accorded to a diplomatic agent;
as from the date on which the salaries and emoluments (excluding pensions and similar benefits paid by the Organisation) paid to them by the Organisation become subject to taxation by the Organisation for its benefit, exemption from income tax in respect of such salaries and emoluments, provided that nothing in this paragraph shall be interpreted as precluding such salaries and emoluments from being taken into account for the purpose of assessing the amount of taxation to be applied to income from other sources; and
provided that the Organisation has established a social security scheme, which the Secretary of State considers to provide adequate benefits, exemptions whereby for the purposes of the enactments relating to social security, including enactments in force in Northern Ireland—
services rendered for the Organisation 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
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.