Supreme Court allows teacher's reinstatement claim, ruling unilateral inactivity status is a prohibited work condition change under trade union law.

The Supreme Court of Poland overturned a lower court decision to dismiss the teacher's appeal, ordering her reinstatement to her position. The plaintiff argued that the school's unilateral transfer to an inactive status without union approval constituted an adverse change in working conditions prohibited by trade union law. The court held that this legal provision applies broadly to any unilateral employer action detrimental to a union member, covering not just contract modifications but also the imposition of inactivity status.