The Republic of Croatia is a unitary state using a parliamentary system of governance. With the collapse of the ruling communist party in SFR Yugoslavia, Croatia organised its first multi-party elections and adopted its present Constitution in 1990. It declared independence on 8 October 1991 which led to the break-up of Yugoslavia and countries international recognition by the United Nations in 1992. Under its 1990 Constitution, Croatia operated a semi-presidential system until 2000 when it switched to a parliamentary system. Government powers in Croatia are legislative, executive, and judiciary powers.