The EAC Customs Union currently consists of 5 member countries: Russia, Belarus, Kazakhstan, Kyrgyzstan, Armenia.
The Customs Union was founded in 2010 between Russia, Belarus, and Kazakhstan, giving the green light to a free trade area between member states.
The international treaty entered into force on 01/01/2015, signed in Astana on 05/29/2014 by the founding countries: Russia, Belarus and Kazakhstan, which established the Eurasian Economic Union, later joined by Armenia (02/01/2015) and Kyrgyzstan (12/08/2015).