Article L711-11 of the French Commercial code
A chamber of commerce and industry called the “Paris-Ile-de-France regional chamber of commerce and industry” is hereby created, the district of which corresponds to the entire Ile-de-France region. The chambers of commerce and industry and delegations existing in the Ile-de-France region are attached to the Paris-Ile-de-France regional chamber of commerce and industry as departmental chambers of commerce and industry of Ile-de-France not having the legal status of a public establishment….