Key legal question
Whether the appeal could be entered into after the appellants failed to pay the advance costs within the extended deadline.
Extracted holding
No; the court refused to enter into the appeal because the advance costs were still unpaid after the grace period expired.
Extracted reasoning
Under Art. 62(3) BGG and in simplified procedure under Art. 108(1)(a) BGG, non-payment of the ordered advance within the extended deadline requires non-entry.