Member states of the Commonwealth of Independent States

Two states, Ukraine and Turkmenistan, have ratified the CIS Creation Agreement, making them "founding states of the CIS", but did not ratify the subsequent Charter that would make them members of the CIS. These states, while not being formal members of the CIS, were allowed to participate in CIS.[12] They were also allowed to participate in various CIS initiatives, e.g. the Commonwealth of Independent States Free Trade Area,[13] which were, however, formulated mostly as independent multilateral agreements, and not as internal CIS agreements. Additionally, Ukraine became an associate member state of the CIS Economic Union in 1994 and Turkmenistan an associate member state of the CIS in 2005.

Country[14]	Agreement/protocol ratified	Charter ratified	Notes
Turkmenistan	26 December 1991	Not ratified	"Founding state". Has never been a member. "Associate state" since 2005.
Ukraine	10 December 1991	Not ratified	"Founding state". Has never been a member. Largely ceased to participate in CIS from 2014, and withdrew representatives from all statutory bodies of CIS in 2018 as a result of the Annexation of Crimea by the Russian Federation and Russia's involvement in the War in Donbass[15]

Although Ukraine was one of the states which ratified the Creation Agreement in December 1991, making it a Founding State of the CIS, it chose not to ratify the CIS Charter[16][17] as it disagrees with Russia being the only legal successor state to the Soviet Union. Thus it has never been a full a member of the CIS.[18][19] However, Ukraine kept participating in the CIS, despite not being a member. In 1993, Ukraine became an associate member of CIS,[20]

Following the Russian military intervention in Ukraine and annexation of Crimea, relations between Ukraine and Russia deteriorated, leading Ukraine to consider ending its participation in the CIS. As Ukraine never ratified the Charter, it could cease its informal participation in the CIS. However, to fully terminate its relationship with the CIS it would need to legally withdraw from the Creation Agreement, as Georgia did previously. On 14 March 2014, a bill was introduced to Ukraine's parliament to denounce their ratification of the CIS Creation Agreement, but it was never approved.[21][22][23] Following the 2014 parliamentary election, a new bill to denounce the CIS agreement was introduced.[24][25] In September 2015, the Ukrainian Ministry of Foreign Affairs confirmed Ukraine will continue taking part in the CIS "on a selective basis".[26][27] Since that month, Ukraine has had no representatives in the CIS Executive Committee building.[26] In April 2018, Ukrainian President Petro Poroshenko indicated that Ukraine would formally leave the CIS.[28] As of 1 June the CIS secretariat had not received formal notice from Ukraine of its withdrawal from the CIS, a process which will take 1 year following notice being given.[29][30][31][32][33][34][35]

On 19 May 2018, President Poroshenko signed a decree formally ending Ukraine's participation in CIS statutory bodies.[36] The CIS secretariat stated that it will continue inviting Ukraine to participate.[33] Ukraine has further stated that it intends to review its participation in all CIS agreements, and only continue in those that are in its interests.[37][38] The CIS secretariat stated that they will keep inviting Ukraine to participate in CIS activities.[33]

Following the overthrow of Eduard Shevardnadze in Georgia, Georgia officially withdrew from the Council of Defense Ministers in February 2006 with a statement that "Georgia has taken a course to join NATO and it cannot be part of two military structures simultaneously",[39][40]

In the aftermath of the Russo-Georgian War in 2008, President Saakashvili announced during a public speech in the capital city Tbilisi that Georgia would leave the CIS[41] and the Georgian Parliament voted unanimously on 14 August 2008 to withdraw from the regional organization.[42] On 18 August 2008 the Ministry of Foreign Affairs of Georgia sent a note to the CIS Executive Committee notifying it of the aforesaid resolutions of the Parliament of Georgia and Georgia’s withdrawal from CIS.[43] In accordance with the CIS Charter (sec. 1, art. 9),[1] Georgia's withdrawal came into effect 12 months later, on 18 August 2009.[44][45]