Article L5221-1 of the French General Code of Local Authorities
Two or more municipal councils, deliberative bodies of public establishments for inter-municipal cooperation or mixed syndicates may initiate between themselves, through their mayors or presidents, an agreement on objects of communal or inter-municipal utility included within their remit and which concern both their respective municipalities, their public establishments for inter-municipal cooperation or their mixed syndicates. They may enter into agreements with each other for the purpose of undertaking or maintaining…