Questione giuridica chiave
Whether the administrative recourse by the federal office was admissible against the cantonal judgment.
Decisione estratta
The recourse was admissible because the federal office may challenge a cantonal final decision when it alleges unlawful granting of a residence right under federal law.
Motivazione estratta
The exception to inadmissibility in foreigners law applies when the federal authority seeks uniform and correct application of federal public law.