Kernrechtsfrage
Whether the Federal Office could appeal and whether failure to notify it of the detention ruling mattered.
Extrahierter Entscheid
The Federal Office was entitled to appeal, and the missing notification violated federal law, but caused no prejudice because the office still filed a timely appeal.
Extrahierte Begründung
Authorities have parallel federal appeal rights; the court held that notification must reach at least one competent federal body, and in this case timely knowledge cured the omission.