 The passports issued by Nikola I Petrovic-Njegos were significantly changed in appearance, also losing any reference to nationality.The same were the unrecognized passports published by the Montenegrin Government in Exile in 1919, after the country's annexation by Serbia.Following the breakup of Yugoslavia, passports were issued in order with the ""Law on Travel Documents of Yugoslav Nationals"" which came into force on 26 July 1996, although the country came into existence in 1992.