Admissibility of appellate review against dismissal of a subsidiary claim and cost allocation in revision proceedings

The Federal Labour Court (BAG) dismissed the plaintiff’s appeal as inadmissible regarding a subsidiary claim and otherwise rejected the appeal on the merits, thereby upholding the lower court’s judgment and ordering the plaintiff to bear the costs of the appeal and revision proceedings. The dispute concerned a challenge to the dismissal of a subsidiary application in a labor dispute, where the plaintiff sought to overturn the first-instance decision. The decisive legal basis involved the procedural inadmissibility of an appeal against a dismissed subsidiary claim and the substantive rejection of the remaining appellate arguments, leaving the original district labor court judgment in force.