Article L812-1 of the French Code governing the entry and residence of foreign nationals and the right of asylum
All foreign nationals must be able to produce the documents under cover of which they are authorised to travel or reside in France at the request of any judicial police officer from the national police force or the national gendarmerie and, on the order and under the responsibility of the latter, the judicial police officers and deputy judicial police officers mentioned in Article 20 and in 1° de l’article 21…