Kernrechtsfrage
Whether the appeal had to be dismissed as inadmissible because the advance of costs was not paid within the additional deadline.
Extrahierter Entscheid
Yes. The appellants did not pay the advance of costs by the extended deadline, so the appeal was inadmissible.
Extrahierte Begründung
The later submission was ineffective because it was filed after expiry of the payment deadline. Under Art. 62(3) LTF, failure to pay the advance leads to inadmissibility; the case was decided in simplified procedure under Art. 108(1)(a) and (2) LTF.