Question juridique clé
Whether the appeal could be entertained despite non-payment of the advance on costs within the set deadline.
Solution extraite
The appeal could not be considered because the advance on costs was not paid within the extended deadline.
Motifs extraits
Under Art. 62(3) BGG, failure to pay the requested advance costs after a grace period allows non-entry in simplified procedure under Art. 108(1)(a) BGG.