KIEV, July 8 – The contractual framework with Russia, Belarus and Kazakhstan should be switched to Ukraine's relations with the Customs Union in the 3+1 format, President Viktor Yanukovych said.

"The 3+1 formula that we proposed is our strategy, and it forms the basis of the national pragmatism of our foreign policy. So now we are persuading our partners that the contractual framework, which we have developed at a bilateral level with Russia, Belarus and Kazakhstan, should be moved at least to the 3+1 formula," he said at a press conference in Kiev on Friday.