If the opinion does not require written developments, the judge may authorise the expert to present it orally at the hearing; a record of this shall be drawn up. However, the minutes may be replaced by a mention in the judgment if the case is immediately decided at last instance.
In all other cases, the expert must file a report with the court registry. Only one report shall be drawn up, even if there are several experts; in the event of a difference of opinion, each shall state his opinion.
If the expert has obtained the opinion of another technician in a speciality other than his own, this opinion shall be attached, as appropriate, to the report, to the minutes of the hearing or to the case file.
Where the expert has been assisted in the performance of his mission pursuant to Article 278-1, the report shall mention the names and capacities of the persons who have lent their assistance.
The expert’s submission of his report shall be accompanied by his request for remuneration, a copy of which he shall send to the parties by any means enabling receipt to be established. Where applicable, the parties shall send their written observations on this request to the expert and to the court or, where applicable, to the judge responsible for supervising the investigative measures, within fifteen days of receipt.