Article 706-64 of the French Code of Criminal Procedure
The criminal courts, with the exception of the investigating courts and the assize court, may request the opinion of the Cour de cassation pursuant to Article L. 151-1 of the Code of Judicial Organisation. However, no request for an opinion may be submitted when, in the case concerned, a person is remanded in custody, under house arrest with electronic surveillance or under judicial supervision. .