The income of the régies endowed with sole financial autonomy, including taxes as well as charges, is the subject of a special budget appended to the municipal budget voted by the municipal council.
However, the establishment of an annexed budget, for drinking water and wastewater services managed in the form of a simple or direct public service, is optional for municipalities with fewer than 500 inhabitants, provided that they produce, as an annex to the budget and administrative account, a summary statement showing, item by item, the amounts of revenue and expenditure allocated to these services.