279. In any defended proceeding, the witnesses are examined at the hearing, the other parties being present or having been duly called.
A party may request that witnesses testify without knowledge of the testimony given by other witnesses. However, barring exceptional circumstances, no such request may be made in the case of expert witnesses.
A witness who has been examined before the trial may be examined anew during the trial on a party’s request.
If it is necessary to examine a witness at a distance, the technological means used must allow the witness to be identified, heard and seen live. The court may however decide, after consulting the parties, to hear a witness without the witness being seen.