Article 694-49 of the French Code of Criminal Procedure
Where the issuing State requests, under a European Investigation Order, the execution of an investigative measure that requires evidence to be obtained in real time, on a continuous basis and over a specified period, the practical arrangements for the measure shall be determined by mutual agreement between the magistrate to whom the request is made and the competent authority of the issuing State. The provisions of the first subparagraph shall…