Article L333-4 of the French Code governing the entry and residence of foreign nationals and the right of asylum
The obligation to reroute a foreign national set out in article L. 333-3 is applicable, in the case of transit by air or sea, in the following situations: 1° The transport company that was to take the foreign national to the country of destination later refuses to take him on board; 2° The authorities in the country of destination have refused the foreign national entry and sent him back to…