Article L812-3 of the French Code governing the entry and residence of foreign nationals and the right of asylum
With a view to verifying compliance with the obligations to hold, carry and present the documents provided for in article L. 812-1 or to investigate and record offences relating to the entry and residence of foreign nationals in France, officers of the judicial police of the national police force or the national gendarmerie may carry out summary inspections of vehicles on the public highway, excluding private cars:1° In an area…