Article D47-1-19 of the French Code of Criminal Procedure
When, for the execution of a European investigation request issued by a Member State to another Member State, a detained person must transit through national territory, such transit shall be authorised by the Director of Criminal Affairs and Pardons of the Ministry of Justice upon presentation of a request, accompanied by all the necessary documents. During this transit, the provisions of the first paragraph of article 694-26 shall apply.