Section 589: Members of Government and representatives of diplomatic missions may be summoned to give evidence in court. They may, at their request or at the request of the Legal Department be heard in camera. Except as otherwise provided by law, their evidence shall be received in the manner prescribed in this Code.
Section 590:
(1) Evidence given by a representative of a diplomatic mission shall be in conformity with the principles of international conventions ratified by the Republic of Cameroon.
(2) The letter inviting a representative of a diplomatic mission to testify shall be addressed to him through the Minister in charge of External Relations.
(3) Where the representative of a diplomatic mission accepts to give evidence but is unable to appear due to unavoidable circumstances, a questionnaire shall be addressed to him by the magistrate through the Minister in chare of External Relations.
1. States Parties shall, in accordance with the provisions of this Part and under procedures of national law, comply with requests by the Court to provide the following assistance in relation to investigations or prosecutions:
(b) The taking of evidence, including testimony under oath, and the production of evidence, including expert opinions and reports necessary to the Court;