Article 116 of the Italian Constitution grants to five regions (namely Sardinia, Sicily, Trentino-Alto Adige/Südtirol, Aosta Valley and Friuli-Venezia Giulia) home rule, acknowledging their powers in relation to legislation, administration and finance. They keep between 60% (Friuli-Venezia Giulia) and 100% (Sicily) of all levied taxes. In return they have to finance the health-care system, the school system and most public infrastructures by themselves. Sicily gets additional resources from the Italian state in order to finance all services.
These regions became autonomous in order to take into account linguistic and cultural differences, such as the linguistic minorities in Trentino-Alto Adige/Südtirol, Aosta Valley, Friuli-Venezia Giulia, Sicily and Sardinia. Moreover the government wanted to prevent their secession from Italy after the end of the Second World War.
Trentino-Alto Adige/Südtirol constitutes a special case. The region itself is nearly powerless and the powers granted by the region's statute are mostly exercised by the two autonomous provinces within the region, Trento and Bolzano-Bozen. In this case, the regional institution plays a merely coordinating role.