Amendments to the United Nations Charter
Because Charter amendments require the consent of all five permanent members of the United Nations Security Council—defined in Article 23 of the Charter as "The Republic of China, France, the Union of Soviet Socialist Republics, the United Kingdom of Great Britain and Northern Ireland, and the United States"—it is impossible for other UN member states to force the permanent five to give up their Security Council 'veto power', by means of a Charter amendment. Many reformers have described this situation as a Catch-22. According to Global Policy Forum, "the P-5 are content with the present arrangements and oppose any changes that might dilute or challenge their power or expand their 'club.' China has already announced it will block permanent membership for Japan, and the United States has suggested that it will only support Council reform that commands an implausibly 'broad consensus'".
United Nations Regional Groups
The Western European and Others Group (WEOG for short) has 28 members (15% of all UN members). It has a territory dispersed on all of the continents, but mostly centred in Western Europe and North America. In addition, the United States is an observer (see below). Including the United States, WEOG has 5 seats on the Security Council: three permanent seats (France, United Kingdom, United States), and two non-permanent seats. The Group also has 13 seats on the United Nations Economic and Social Council and 7 seats on the United Nations Human Rights Council. In the rotation of the post of the President of the United Nations General Assembly, the group is eligible for having its nationals elected to this post in years ending with 0 and 5; most recently, Mogens Lykketoft of Denmark was elected to this position in 2015.