Volodymyr Groysman, speaker of the Ukrainian parliament and head of the constitutional commission, said federalization is not a path that Ukraine should take.

"Federalization is not an option for Ukraine. It's an option for countries which used to have principalities that later joined. It didn't happen here," he said in an interview posted on the website of the weekly publication Novy Chas on Friday.

Groysman said federalization or confederation envisages a collection of various subjects under one form of governance, but Ukraine is a unitary, sovereign state. "To create a federation in Ukraine, one needs to divide everything and then join it all together. What for?" he said.

"I agree that some special status or federalization can fully reduce the effect of Ukraine's European integration or serious reforms. Federalization is something that Russia is trying to force on us. The question is why. I understand why they need it. But I don't even see an object for discussion as to why we should do that," Groysman said.

Groysman said the basic level in the state system in the case of federalization will be federation subjects, not communities. "Ukraine will be divided into principalities, and the communities will remain weak and dependent," he said.