The expert must take into consideration the observations or claims of the parties, and, where they are in writing, attach them to his opinion if the parties so request.
However, where the expert has set the parties a time limit within which to make their observations or claims, he is not obliged to take into account those made after the expiry of that time limit, unless there is a serious and duly justified cause, in which case he shall report to the judge.
Where they are in writing, the last observations or claims of the parties must briefly restate the content of those they have submitted previously. Failing this, they are deemed to have been abandoned by the parties.
The expert must mention, in his opinion, the action he has taken on the observations or claims submitted.