Article L3121-24 of the French General Code of Local Authorities
In the departmental councils, the operation of the groups of elected representatives may be the subject of deliberations without the decisions relating to the allowance system for elected representatives being modified on this occasion. In these same departmental councils, the groups of elected representatives are constituted by the submission to the president of the departmental council of a declaration, signed by their members, accompanied by a list of their members…