Article 728-33 of the French Code of Criminal Procedure
Enforcement of the sentencing decision may be refused in the following cases: 1° The sentencing decision is based on offences committed wholly, mainly or for the most part on French territory or in an assimilated place; 2° The length of the sentence remaining to be served is less than six months on the date of receipt of the certificate; 3° The sentencing State has refused to give its consent for…