Brunei is a country.
Brunei ( [ bruːˈnaɪ ] , ) , officially the Nation of Brunei , the Abode of Peace ( Negara Brunei Darussalam , Jawi : ) , is a sovereign state located on the north coast of the island of Borneo in Southeast Asia . Federated state . Once a federal constitution is formed , the rules governing the relationship between federal and regional powers become part of the country 's constitutional law and not international law .