Article L5211-17-2 of the French General Code of Local Authorities
One or more communes that are members of a public establishment of inter-communal cooperation with its own tax system may transfer to the latter, in whole or in part, some of their competences whose transfer is not provided for by law or by the decision establishing the establishment, as well as the property, equipment or public services necessary for their exercise. These transfers take place under the conditions set out…