The basic institutional law of the autonomous community is the Statute of Autonomy. The Statutes of Autonomy establish the denomination of the community according to its historical identity, the limits of their territories, the name and organization of the institutions of government and the rights they enjoy according the constitution.[57]
The government of all autonomous communities must be based on a division of powers comprising:
* a Legislative Assembly whose members must be elected by universal suffrage according to the system of proportional representation and in which all areas that integrate the territory are fairly represented;
* a Government Council, with executive and administrative functions headed by a president, elected by the Legislative Assembly and nominated by the King of Spain;
* a Supreme Court of Justice, under the Supreme Court of the State, which head the judicial organization within the autonomous community.
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