Question juridique clé
Whether the appeal should be entered into despite non-payment of the cost advance within the extended time limit.
Solution extraite
No entry could be made because the appellant failed to pay the advance within the additional deadline.
Motifs extraits
Under Art. 62(3) BGG, failure to pay the required advance after a grace period permits non-entry; the simplified procedure under Art. 108(1)(a) BGG applies.