On 23 December 2013 Russian presidential aide Yuri Ushakov stated "there is no contradiction" in Ukraine's association with the EU and their observer status in the Customs Union of Belarus, Kazakhstan, and Russia and the Eurasian Economic Union.
Pada tanggal 23 Desember 2013, ajudan kepresidenan Rusia Yuri Ushakov menyatakan "tidak ada kontradiksi" antara perjanjian asoisasi Ukraina-Uni Eropa dan status Ukraina sebagai pengamat di Serikat Pabean Belarus, Kazakhstan, dan Rusia, dan Uni Ekonomi Eurasia.