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".
Vance plan
The Vance plan consisted of two agreements. The first agreement, known as the Geneva Accord, was signed by Yugoslav defence minister General Veljko Kadijević, President of Serbia Slobodan Milošević and Croatian President Franjo Tuđman in Geneva, Switzerland, on 23 November 1991. Because the ceasefire agreed at that time did not hold, further negotiations resulted in the Implementation Agreement of 2 January 1992. The Implementation Agreement, signed in Sarajevo, Bosnia and Herzegovina, by JNA Lieutenant Colonel General Andrija Rašeta and Croatian defence minister Gojko Šušak, produced a longer-lasting ceasefire, which was supervised by the United Nations Protection Force (UNPROFOR). The parties failed to completely implement the remaining major aspects of the Vance plan.