Ukraine has formal relations with many nations and in recent decades has been establishing diplomatic relations with an expanding circle of nations. The foreign relations of Ukraine are guided by a number of key priorities outlined in the foreign policy of Ukraine. Western relations Ukraine considers Euro-Atlantic integration its primary foreign policy objective, but in practice balances its relationship with Europe and the United States with strong ties to Russia. The European Union's Partnership and Cooperation Agreement (PCA) with Ukraine went into force on March 1, 1998. The European Union (EU) has encouraged Ukraine to implement the PCA fully before discussions begin on an association agreement. The EU Common Strategy toward Ukraine, issued at the EU Summit in December 1999 in Helsinki, recognizes Ukraine's long-term aspirations but does not discuss association. On January 31, 1992, Ukraine joined the then-Conference on Security and Cooperation in Europe (now the Organization for Security and Cooperation in Europe—OSCE), and on March 10, 1992, it became a member of the North Atlantic Cooperation Council. Ukraine also has a close relationship with NATO and has declared interest in eventual membership. It is the most active member of the Partnership for Peace (PfP). Former President Viktor Yushchenko indicated that he supports Ukraine joining the EU in the future. Plans for Ukrainian membership to NATO were shelved by Ukraine following the 2010 Ukrainian presidential election in which Viktor Yanukovych was elected President. Yanukovych opted to keep Ukraine a non-aligned state. This materialized on June 3, 2010 when the Ukrainian parliament (Verkhovna Rada) excluded, with 226 votes, the goal of "integration into Euro-Atlantic security and NATO membership" from the country's national security strategy giving the country a non-aligned status. "European integration" has remained part of Ukraine's national security strategy and co-operation with NATO was not excluded. Ukraine then considered relations with NATO as a partnership. Ukraine and NATO continued to hold joint seminars and joint tactical and strategical exercises. After February 2014's Yanukovych ouster and the Russian military intervention in Ukraine, the nation has renewed its drive for NATO membership. On 23 December 2014 the Verkhovna Rada abolished, with 303 votes, Ukraine's non-aligned status. Relations with CIS states Ukraine's relations with Russia are complicated by energy dependence and by payment arrears. However, relations improved with the 1998 ratification of the bilateral Treaty of Friendship and Cooperation. The two sides have signed a series of agreements on the final division