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a). The Member State in whose territory the Organization has its Headquarters shall accord to the missions of Third States to the Organization and the members of their staff the immunities and privileges accorded to diplomatic missions and their staff;
b). In addition, the Member State in whose territory the Organization has its Headquarters shall accord the customary immunities and privileges to the representatives of Third States, on temporary mission, who are not covered by paragraph (a) of the present Article, while present in its territory for the purpose of ensuring the representation of Third States in relation to the proceedings of the Organization.