 Subcontracting garbage collection and management, overseeing the use of public spaces and arbitrating neighborhood land "use" disputes which is managed by the National Property office ("Oficina de Bienes Nacionales" in Spanish) is also controlled by the mayor's office.Water, electrical supply and public transportation coordination are handled by several Central Government's offices, and as such, are not under control of the mayor.Mayors ("maires") in France are elected every six years in local elections.