"Poland could have to leave the EU over its judicial reform proposals, the country's Supreme Court has warned.
The proposals would allow judges to be dismissed if they questioned the government's judicial reforms.
Judges say the proposals threaten the primacy of EU law and could be an attempt to gag the judiciary.
Poland has already been referred to the European Court of Justice (ECJ) regarding rules for judges.
Under the proposals put forward by the socially conservative Law and Justice party government, judges can be punished for engaging in "political activity".
Any judge that questioned the legitimacy of judges nominated by the National Council of the Judiciary could be handed a fine or in some cases dismissed."