Investigators authorised to conduct investigations take an oath before the judicial court of their place of residence or before the Paris judicial court, stating: “I swear to carry out with accuracy and probity the findings, investigations, research and operations falling within my remit and not to reveal or use, for purposes unrelated to this remit, anything that comes to my knowledge on this occasion ˮ.
In the event of serious impediment, the president of the judicial court may authorise the investigator to take an oath in writing.