Article L3621-1 of the French General Code of Local Authorities
The territorial limits of metropolitan Lyon set out in Article L. 3611-1 are modified by law, after consultation with the metropolitan council, the municipal councils of the interested communes and the departmental council concerned, the Conseil d’Etat having been heard. However, when the metropolitan council, the municipal councils of the municipalities concerned and the departmental council have approved the proposed modifications by deliberation, these territorial boundaries are modified by decree…