reason for the emergence of this organization in the international legal field is the collapse of the USSR and the formation of its space of 15 new sovereign states, closely related to political, economic and humanitarian spheres, as a result of the existence of centuries withinone country.Deep integration of the republics and predetermined objective interest of new subjects of international law to cooperate in various fields of economy, politics and culture on the basis of equal partnership and respect for each other's sovereignty.

CIS was founded 8 December 1991, when the leaders of Russia, Ukraine and Belarus signed the so-called"Belovezhskoe agreement", the text of which has been ascertained abolition of the Soviet Union and the formation on its basis of a new form of internati
onal cooperation of the former Soviet republics.This document called "Agreement on the Establishment of the Commonwealth of Independent States", and by 1994 it had ratified and entered into the CIS 8 more states - Azerbaijan, Armenia, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan and Uzbekistan.
December 21, 1991 by the heads of 11 former Soviet republics at the summit of Alma-Ata Declaration was signed on the purposes and principles of the CIS and the protocol to the agreement on the establishment of the CIS.In 1993, in Minsk, the CIS Charter was adopted, the main legal document organization that regulates its activity.According to Art.7. The statute of the CIS member states are divided on the founding states and the member states of the Commonwealth.The founders of the CIS countries are the countries that have ratified the agreement on its establishment of 8 December 1991 and the Protocol to the Agreement of 21 December 1991.CIS member states are those of its founders, which have committed themselves to the Charter.The Charter has been ratified by 10 of the 12 members of the CIS, except for Ukraine and Turkmenistan.

Estonia, Latvia and Lithuania refused to participate in the CIS initially by European integration vector.Ukraine, being one of the founders and the CIS member states refused to ratify the statute of the CIS and a member of the legal community is not.In 2009, under the influence of events in Abkhazia and South Ossetia, from membership in the CIS came to Georgia.

Thus, as of 2014, 11 members of the CIS countries are: Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan.CIS members are all of these states, except Turkmenistan and Ukraine.