Article 23
Nationals and permanent residents
At the time of signature, ratification, acceptance, approval or accession, any State may declare that:
(a) Without prejudice to paragraph 6 of article 15 and paragraph 1 (d) of article 16, a person referred to in articles 15, 16, 18, 19 and 21 shall, in the territory of the State Party of which he or she is a national or permanent resident, enjoy only the following privileges and immunities to the extent necessary for the independent performance of his or her functions or his or her appearance or testimony before the Court:
(i) Immunity from personal arrest and detention;
(ii) Immunity from legal process of every kind in respect of words spoken or written and all acts performed by that person in the performance of his or her functions for the Court or in the course of his or her appearance or testimony, which immunity shall continue to be accorded even after the person has ceased to exercise his or her functions for the Court or his or her appearance or testimony before it;
(iii) Inviolability of papers and documents in whatever form and materials relating to the exercise of his or her functions for the Court or his or her appearance or testimony before it;
(iv) For the purposes of their communications with the Court and for a person referred to in article 19, with his or her counsel in connection with his or her testimony, the right to receive and send papers in whatever form.
(b) A person referred to in articles 20 and 22 shall, in the territory of the State Party of which he or she is a national or permanent resident, enjoy only the following privileges and immunities to the extent necessary for his or her appearance before the Court:
(i) Immunity from personal arrest and detention;
(ii) Immunity from legal process in respect of words spoken or written and all acts performed by that person in the course of his or her appearance before the Court, which immunity shall continue to be accorded even after his or her appearance before the Court.
At the time of signature, ratification, acceptance, approval or accession, any State may declare that:
(a) Without prejudice to paragraph 6 of article 15 and paragraph 1(d) of article 16, a person referred to in articles 15, 16, 18, 19 and 21 shall, in the territory of the State Party of which he or she is a national or permanent resident, enjoy only the following privileges and immunities to the extent necessary for the independent performance of his or her functions or his or her appearance or testimony before the Court:
(i) Immunity from personal arrest and detention;
(ii) Immunity from legal process of every kind in respect of words spoken or written and all acts performed by that person in the performance of his or her functions for the Court or in the course of his or her appearance or testimony, which immunity shall continue to be accorded even after the person has ceased to exercise his or her functions for the Court or his or her appearance or testimony before it;
(iii) Inviolability of papers and documents in whatever form and materials relating to the exercise of his or her functions for the Court or his or her appearance or testimony before it;
(iv) For the purposes of their communications with the Court and for a person referred to in article 19, with his or her counsel in connection with his or her testimony, the right to receive and send papers in whatever form.
(b) A person referred to in articles 20 and 22 shall, in the territory of the State Party of which he or she is a national or permanent resident, enjoy only the following privileges and immunities to the extent necessary for his or her appearance before the Court:
(i) Immunity from personal arrest and detention;
(ii) Immunity from legal process in respect of words spoken or written and all acts performed by that person in the course of his or her appearance before the Court, which immunity shall continue to be accorded even after his or her appearance before the Court.