Poland may refuse to sign the EU’s new treaty on tighter fiscal rules if Warsaw is not given participant status at eurozone summits, Prime Minister Donald Tusk said Tuesday.

"I have informed European Council President Herman Van Rompuy that if Poland isn't granted participant status in eurozone summits, which would give us a sense that we are participating in the decision-making process to some extent... if, in our view, the fiscal pact is a wrong step for the entire EU, as it divides or start to divide Europe into two clubs... it will be hard for us to sign it," Tusk told a press conference.

"Our stance will be positive and pro-European but tough," Tusk added. "We will not accept a model which will, in our opinion, break up EU solidarity."

The new European Union treaty to tighten budget discipline in the eurozone will be a key point at a EU summit in Brussels on Jan. 30.