Article D47-37-4 of the French Code of Criminal Procedure
When the Assize Court is seised pursuant to the provisions of the second paragraph of Article 706-120, it shall, in accordance with the provisions of that paragraph, only rule in camera on the application of Article 122-1 of the Criminal Code. The experts who have examined the person, and in particular those who have given differing opinions, must be heard by the assize court, if necessary by means of telecommunication….