According to the Italian Constitution, the Italian Republic is formed by Municipalities, Provinces, Regions and the State. The local public institutions are autonomous, have their own Statutes, their own power and functions, their own official resources. The general principles established by the Constitution to ascertain the different functions of the institutions that form the Republic are those of subsidiarity (the closeness of the institution to the citizens), differentiation (the characteristic of each institution to operate in its own specific sector), adequacy (the capability of an institution to be up to its assignments and functions).