Questione giuridica chiave
Whether the cantonal supplementary-benefits authority had standing to file an appeal in public law matters against a judgment concerning only cantonal supplemental benefits
Decisione estratta
It lacked standing because no federal statute expressly granted it the right to appeal and it had no legally protected interest under Art. 89 LTF.
Motivazione estratta
The dispute concerned exclusively benefits based on cantonal law; the authority could not rely on the federal appeal right for supplementary benefits, which applies only to federal-law disputes, and it had no protected interest in the annulment or modification of the cantonal judgment.