The examining magistrate may ask the expert to submit a provisional report before his final report. The public prosecutor and the parties then have a period set by the examining magistrate, which may not be less than fifteen days or, in the case of accounting or financial expertise, one month, to send at the same time to the expert and to the judge any written observations they require on this provisional report. In the light of these observations, the expert submits his final report. If no observations are made, the provisional report is considered to be the final report.
The filing of a provisional report is mandatory if the Public Prosecutor so requests or if a party has made a request in accordance with the procedures set out in the penultimate paragraph of Article 81 when it is informed of the decision ordering the expert opinion pursuant to Article 161-1.