Arbitration Commission of the Peace Conference on Yugoslavia
On 20 November 1991 Lord Carrington asked: "Can the internal boundaries between Croatia and Serbia and between Bosnia and Herzegovina and Serbia be regarded as frontiers in terms of public international law?" Applying the principle of "uti possidetis juris", the commission concluded on 11 January 1992, "The boundaries between Croatia and Serbia, between Bosnia and Herzegovina and Serbia, and possibly other adjacent independent states may not be altered except by agreement freely arrived at... Except where otherwise agreed, the former boundaries become frontiers protected by international law".
Cvetković–Maček Agreement
The Cvetković–Maček Agreement (; ) was a political agreement on the internal divisions in the Kingdom of Yugoslavia which was settled on August 26, 1939 by Yugoslav prime minister Dragiša Cvetković and Vladko Maček, a Croat politician. The agreement established the Banovina of Croatia, drawn to include as many ethnic Croats as possible, which effectively created a Croatian sub-state in Yugoslavia, a demand of Croat politicians since the 1918 founding of Yugoslavia.