In the Republic of Croatia, the State authority is established on the principle of a triple government authority with a guaranteed right of citizens at the local and regional selfgovernment levels. The authority is limited to the Constitution of the Republic of Croatia. The legislative power (legislation) constitutes a parliament that is traditionally called the Parliament. The Parliament executes laws and other regulations. The legislative power controls the executive. The executive power is an (executive) authority that has the function of enforcing laws or adopting other legal acts needed to enforce a law passed by Parliament. The President of the Republic and the Government of the Republic constitute executive power. Three models of government that are based on executive power, presidential, semipresidential and parliamentary systems, can be distinguished. The Republic of Croatia belongs to the parliamentary system of 2000, but from its independence to the year 2000, it belonged to the semi-presidential system. Judicial power (judiciary) is the power of enforcement, but also an interpretation of the law. Courts such as The Constitutional Court, the Supreme Court, the County Court, the Municipal Court and others exercise judicial power. Judicial power is, by the nature of the role they perform, independent and autonomous.