The experts shall present at the hearing, where appropriate, the results of the technical operations they have carried out, after taking an oath to assist the judiciary to the best of their honour and conscience. During their hearing, they may consult their report and its appendices.
The chairman may, either of his own motion or at the request of the public prosecutor, the parties or their counsel, ask them any questions falling within the scope of the mission entrusted to them. The public prosecutor and the parties’ lawyers may also put questions directly to the experts in accordance with the procedures set out in articles 312 and 442-1.
After their presentation, the experts attend the debates, unless the chairman authorises them to withdraw.