Article 13
Representatives of States participating in the Assembly and its subsidiary organs and representatives of intergovernmental organizations
1. Representatives of States Parties to the Statute attending meetings of the Assembly and its subsidiary organs, representatives of other States that may be attending meetings of the Assembly and its subsidiary organs as observers in accordance with article 112, paragraph 1, of the Statute, and representatives of States and of intergovernmental organizations invited to meetings of the Assembly and its subsidiary organs shall, while exercising their official functions and during their journey to and from the place of meeting, enjoy the following privileges and immunities:
(d) The right to use codes or cipher, to receive papers and documents or correspondence by courier or in sealed bags and to receive and send electronic communications;

Article 18
Counsel and persons assisting defence counsel
1. Counsel shall enjoy the following privileges, immunities and facilities to the extent necessary for the independent performance of his or her functions, including the time spent on journeys, in connection with the performance of his or her functions and subject to production of the certificate referred to in paragraph 2 of this article:
(d) For the purposes of communications in pursuance of his or her functions as counsel, the right to receive and send papers and documents in whatever form;

Article 19
Witnesses
1. Witnesses shall enjoy the following privileges, immunities and facilities to the extent necessary for their appearance before the Court for purposes of giving evidence, including the time spent on journeys in connection with their appearance before the Court, subject to the production of the document referred to in paragraph 2 of this article:
(e) For purposes of their communications with the Court and counsel in connection with their testimony, the right to receive and send papers and documents in whatever form;

Article 21
Experts
1. Experts performing functions for the Court shall be accorded the following privileges, immunities and facilities to the extent necessary for the independent exercise of their functions, including the time spent on journeys in connection with their functions, subject to production of the document referred to in paragraph 2 of this article:
(d) For the purposes of their communications with the Court, the right to receive and send papers and documents in whatever form and materials relating to their functions for the Court by courier or in sealed bags;

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:
(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.