The droit de banalité ensured the seigneur's monopoly on the building and operation of flour mills in his fief. Tenants were obliged to use them and pay their seigneur a fee of one minot in fourteen. The seigneur, for his part, was required to maintain the mills in good working order.

The Communal Mill
Petition to the Secretary of State for the Marine, Jean-Frédéric Phélypeaux, Comte de Maurepas, by Michel Morin, on behalf of the habitants of the Rivière du Sud, concerning the poor maintenance of the communal mills by the seigneur, Charles-Marie Couillard de Beaumont, ca. 1743
FR CAOM COL C11A 81 fol. 104-105vo