Article 193. § 1. If the determination of material facts having an essential bearing upon the resolution of the case requires some special knowledge, the court shall consult an expert or experts.
§ 2. A scientific or a specialised institution may also be called to give their opinion.
Article 237. § 1. After the proceedings have started, the court, upon a motion from the state prosecutor may order surveillance and recording of the content of telephone conversations, in order to detect and obtain evidence for the pending proceedings or to prevent a new offence from being committed.
§ 2. In cases not amenable to delay, the surveillance and recording of conversations may be ordered by the state prosecutor who is, however, obligated to obtain an approval for the order from the court within 5 days.
§ 3. The surveillance and recording of the content of telephone conversations is allowed only when proceedings are pending or a justified concern exists, about the possibility of a new offence being committed regarding:
1. Les États Parties font droit, conformément aux dispositions du présent chapitre et aux procédures prévues par leur législation nationale, aux demandes d'assistance de la Cour liées à une enquête ou à des poursuites et concernant :
b) Le rassemblement d'éléments de preuve, y compris les dépositions faites sous serment, et la production d'éléments de preuve, y compris les expertises et les rapports dont la Cour a besoin ;