Questione giuridica chiave
Whether the appeal had to be heard despite non-payment of the court cost advance within the extended deadline.
Decisione estratta
The appeal was not entered into because the advance payment was not made within the non-extendable grace period.
Motivazione estratta
Under Art. 62(3) BGG, failure to pay the requested advance costs within the set deadline results in non-entry; simplified procedure under Art. 108(1)(a) and (2) BGG applies.