Question juridique clé
Whether the appeal could be entered into despite non-payment of the ordered cost advance within the extended deadline.
Solution extraite
No entry could be made because the cost advance was not paid within the additional deadline.
Motifs extraits
Under Art. 62(3) BGG, failure to pay the requested advance even after the grace period requires non-entry; the court therefore decided under Art. 108(1)(a) BGG.