Question juridique clé
Whether the appeal must be entered into despite non-payment of the court cost advance.
Solution extraite
No. Because the appellant failed to pay the advance even within the final extended deadline, the Court would not enter into the appeal.
Motifs extraits
Under Art. 62 BGG, the appellant must pay an advance for probable court costs; if it is not paid within the set deadline and grace period, the Federal Supreme Court does not enter the appeal. The appellant remained in default despite repeated extensions.