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".
Croatia
Croatia joined the Partnership for Peace on 25 May 2000
and become a member of the World Trade Organization on 30 November 2000.
On 29 October 2001, Croatia signed a Stabilization and Association Agreement with the European Union,
submitted a formal application for the EU membership in 2003, was given the status of candidate country in 2004, and began accession negotiations in 2005. In November 2000 and March 2001, the Parliament amended the Constitution changing its bicameral structure back into historic unicameral and reducing the presidential powers.