Kernrechtsfrage
Whether the appeal had to be declared inadmissible because the court advance was not paid within the set time limit.
Extrahierter Entscheid
Yes. The failure to pay the required advance within the prescribed deadline required the appeal to be declared inadmissible.
Extrahierte Begründung
Under Art. 62(3) BGG, non-payment of the advance of costs leads to inadmissibility; the appellant did not comply despite an additional non-extendable deadline.