Article 696-126 of the French Code of Criminal Procedure
Searches, home visits and seizures must, in the absence of flagrante delicto or the express consent of the person at whose premises they take place, be carried out with the authorisation of the juge des libertés et de la détention (liberty and custody judge) to whom the matter has been referred by reasoned written subpoena from the Deputy European Public Prosecutor under the conditions laid down in Article 76.