On the basis of provisions place out by the Vienna Convention on international treaties, Russia is looking for chances to initiate protection measures in its trade relations with Ukraine. Ukraine has signed the economic part of the Ukraine-European Union Association Agreement on June 27, 2014, which contains provisions for the free trade zone creation and the import tariffs removal. As Ukraine becomes part of a free trade zone with the European Union, Russia will require protecting its internal market from the tariff-free flow of European goods from Ukraine. According to the article 62 of the Vienna Convention, Russia desires to abolish barrier-free relations with Ukraine that approves for the termination or postponement of a contract in the event of an important change of circumstances.