If the expert is not enrolled in the roll of experts, he shall take an oath, before the entity assigning him, whether the court or the supervising judge, as the case may be, that he will carry out his task faithfully and honestly; otherwise, his task will be null and void. The appearance of the litigants when the expert takes oath is not required. There shall be drawn up a record of oath-taking which shall be signed by the judge and kept in the case file.
Interpretation and application must be checked against the official text and current version.