Public service wage claim: Inadmissibility of appellate challenge to declaratory judgment for BAT compensation

The Federal Labour Court dismissed the plaintiff's appeal in part, upholding the lower court's rejection of her claim for back wages as inadmissible and ordering the plaintiff to bear the costs of the appellate and revision proceedings; consequently, the plaintiff did not prevail in her attempt to secure the declaratory judgment that the defendant state was obligated to pay basic compensation under specific tariff tables for the period of May 2008 to December 2009. The dispute centered on a public servant's claim for supplementary remuneration, specifically alleging entitlement to basic compensation corresponding to the highest seniority level of a particular compensation group under the collective agreement on wages for public service (BAT), challenging the state's refusal to pay these differential amounts. The decisive legal basis was the inadmissibility of the appeal, which precluded a substantive review of the entitlement to the specified tariff-based compensation, resulting in the preservation of the lower instance's procedural rejection of the wage claim.