The Statute of Autonomy of Catalonia provides Catalonia's basic institutional regulations under the Spanish Constitution of 1978. It defines the rights and obligations of the citizens of Catalonia, the political institutions of the Catalan region, their competences and relations with the rest of Spain, and the financing of the Government of Catalonia.
This Law was approved by referendum 18 June 2006 and supplants the Statute of Sau, which dated from 1979.
In 1919, a first project of Statute was started by the Commonwealth of Catalonia.
In 1928, a project of Constitution was written in Havana by exiled Catalonian nationalists.
Catalonia first obtained a Statute of Autonomy in 1932, during the Second Spanish Republic. This law was abolished by General Francisco Franco after the Spanish Civil War, largely because Catalonia had been a region generally opposed to Franco's Nacionales forces. During periods of his rule, public usage of the Catalan language and culture, and more specifically, Catalan self-government were harshly suppressed..
In 1979, during the Spanish transition to democracy, the second Statute was approved by referendum.
On June 18, 2006, a referendum amending the Statute of Autonomy of Catalonia of 1979 to further expand the authority of the Generalitat de Catalunya, Catalonia's government, was approved, and became effective on 9 August 2006.