Article 694-46 of the French Code of Criminal Procedure
Where an investigative decision is requested to provisionally prevent the destruction, transformation, moving, transfer or disposal of items likely to be used as evidence, the magistrate shall give his decision as soon as possible and, if possible, within twenty-four hours of receiving it. Where the issuing authority requests, in the decision, that the items seized pursuant to the first paragraph be transferred to the issuing State, the provisions of Article…