Key legal question
Whether the appeal could be entered into despite non-payment of the advance costs within the time limit.
Extracted holding
No entry could be made because the advance costs were not paid even within the grace period.
Extracted reasoning
Under Art. 62(3) BGG, failure to pay the required advance costs after a formal extension justifies non-entry in simplified procedure under Art. 108(1)(a) and (2) BGG.