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".
Agreement on Friendship and Cooperation between Bosnia and Herzegovina and Croatia
On 21 July, Izetbegović and Tuđman signed the "Agreement on Friendship and Cooperation between the Republic of Bosnia and Herzegovina and the Republic of Croatia" in Zagreb, Croatia. The agreement allowed them to "cooperate in opposing [the Serb] aggression" and coordinate military efforts. It placed the HVO under the command of the ARBiH. Cooperation was inharmonious, but enabled the transportation of weapons to ARBiH through Croatia in spite of the UN sanctioned arms embargo, reopening channels blocked by Boban. It established "economic, financial, cultural, educational, scientific and religious cooperation" between the signatories. It also stipulated that Bosnian Croats hold dual citizenship for both Bosnia and Herzegovina and for Croatia. This was criticized as Croatian attempts at "claiming broader political and territorial rights in the parts of Bosnia and Herzegovina where large numbers of Croats live". After its signature Boban vowed to Izetbegović that HR-HB would remain an integral part of Bosnia and Herzegovina when the war ended.