 The powers of the legislature include enactment and amendment of the constitution and laws; adoption of the government budget, declarations of war and peace, defining national boundaries, calling referenda and elections, appointments and relief of officers, supervising the Government of Croatia and other holders of public powers responsible to the Sabor, and granting of amnesties.The Croatian constitution and legislation provides for regular presidential and parliamentary elections, and the election of county prefects (county presidents) and assemblies, and city and municipal mayors and councils.Croatia has a three-tiered, independent judicial system governed by the Constitution of Croatia and national legislation enacted by the Sabor.