Article L3113-1 of the French General Code of Local Authorities
Creations and deletions of arrondissements are decided by decree after consultation with the departmental council. Changes to the territorial boundaries of arrondissements are decided by the representative of the State in the region, after consultation with the departmental council. The transfer of the principal town of an arrondissement is decided by decree, after consultation with the departmental council and the municipal councils of the commune in which the principal town…