Article R331-20 of the French Sports Code
Concentrations of land motor vehicles taking place on roads open to public traffic are subject to declaration. However, concentrations of less than fifty vehicles are not subject to declaration. Events involving the participation of land motor vehicles which take place on approved permanent circuits are subject to declaration. Events involving motorised land vehicles which take place on non-permanent circuits, grounds or courses as defined in article R. 331-18 are subject…