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Brazil from WikiPedia:

According to the Brazilian Constitution of 1988, Brazil is a federation of 26 states, one federal district and also the municipalities. None of these units has the right to secede from the Federation.

States (estados) are based on historical, conventional borders and have developed throughout the centuries, though some boundaries are arbitrary. The states can be split or joined together in new states if their people express a desire to do so in a plebiscite. States have autonomous administrations, collect their own taxes and receive a share of taxes collected by the Federal government. They have a governor and a unicameral legislative body (Assembleia Legislativa) elected directly by their voters. They also have independent Courts of Law for common justice. Despite that, in Brazil states have much less autonomy to create their own laws than in the United States. For example, criminal and civil laws can only be voted by the federal bicameral Congress and are uniform throughout the country.

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