The investigative measure is carried out under the supervision of the judge who ordered it when he does not carry it out himself.
When the measure is ordered by a panel, the supervision is exercised by the judge who was in charge of the investigation. Failing this, it is exercised by the chairman of the panel if it has not been entrusted to a member of the panel.
The supervision of the execution of this measure may also be carried out by the judge designated under the conditions of Article 155-1.