Article L5211-18 of the French General Code of Local Authorities
I. – Without prejudice to the provisions of article L. 5215-40, the perimeter of the public intercommunal cooperation establishment may subsequently be extended, by order of the State representative(s) in the department(s) concerned, by the addition of new communes: 1° Either at the request of the municipal councils of the new communes. The modification is then subject to the agreement of the deliberative body of the public establishment of inter-municipal…