The Statutes of autonomy are the basic institutional norm of each of the Autonomous Communities. They contain the identification of the community, the institutions of self-government, and the competences assumed within the constitutional framework.

After the approval of the 17 Statutes of Autonomy, which took place between 1979 and 1983, almost all of these Statutes have been modified. In accordance with the provisions of article 147.3 of the Constitution, these reforms are carried out in accordance with the procedure established in each of them and require the subsequent approval of the General Courts, through Organic Law. These modifications have taken place in successive phases and, at each moment, have had a different purpose and motivation.

Comparative study of the different statutes of autonomy prepared by the technical services of the Ministry.