Labor claim where lower court dismissal was upheld after reversal of appellate decision

The Federal Labour Court (BAG) reversed the appellate decision and upheld the lower court's dismissal of the claim, ordering the plaintiff to bear all litigation costs for the appeal and revision stages. The dispute concerned a labor law claim where the plaintiff sought relief against the defendant, which was successfully challenged through the procedural hierarchy, resulting in the defendant's victory at the highest instance. The court's decisive legal basis rested on the application of labor law principles determining the inadmissibility or lack of merit of the plaintiff's arguments, leading to the rejection of the appeal and the subsequent revision.