Artikel 18

Except insofar as additional privileges and immunities may be granted by the State Party concerned, and without prejudice to article 11, a person enjoying immunities and privileges under this Agreement shall, in the territory of the State Party of which he or she is a national or permanent resident, enjoy only immunity from legal process and inviolability in respect of words spoken or written and all acts done by that person in the discharge of his or her duties, which immunity shall continue even after the person has ceased to exercise his or her functions in connection with the Tribunal.