Questione giuridica chiave
Whether the appellant could again contest the existence of the VAT debt after the prior remand judgment
Decisione estratta
No. The earlier Federal Supreme Court remand bound the parties and authorities on the legal issue of liability, so those arguments were inadmissible.
Motivazione estratta
A remand judgment binds the lower authority and the parties on the legal reasoning expressly decided or necessarily resolved. Issues that could and should have been raised in the first appeal cannot be reopened in a later appeal against the new decision.