Questione giuridica chiave
Whether the federal appeal against the cantonal nullity decision was admissible in scope and form.
Decisione estratta
The appeal was admissible only insofar as it challenged the cantonal nullity judgment; requests seeking more than annulment and remittal were inadmissible.
Motivazione estratta
In concordat arbitration, the nullity appeal is essentially cassatory, and the Federal Court cannot grant broader relief than the cantonal court reviewing nullity.