Question juridique clé
Whether the appeal could be heard despite non-payment of the cost advance within the extended deadline.
Solution extraite
No. Because the cost advance was not paid within the non-extendable final deadline, the Court did not enter the appeal.
Motifs extraits
Under Art. 62 BGG, failure to pay the requested advance within the set and final deadline leads to non-entry. The later request for extension, filed after expiry of the final deadline, was irrelevant; a further extension could not be expected.