At an operational level they are a precious source of information and cooperation for national, local and regional agents of public administration, and therefore lead to greater effectiveness; while at the level of guaranteeing citizens’ rights they make relations with national and Community public authorities easier and more transparent. ###>Ils génèrent donc une efficacité accrue. Au niveau de la garantie des droits des citoyens, ils facilitent et rendent plus transparentes les relations avec les autorités publiques nationales et communautaires.