Article L611-1 of the French Code governing the entry and residence of foreign nationals and the right of asylum
The administrative authority may require a foreign national to leave French territory when the following cases apply:1° The foreign national, unable to justify having entered French territory legally, has remained there without holding a valid residence permit;2° The foreign national, having entered French territory under cover of a visa that has now expired or, not being subject to the visa requirement, having entered France more than three months previously, has…