Kernrechtsfrage
Whether the federal appeal could proceed despite non-payment of the ordered cost advance within the grace period.
Extrahierter Entscheid
The appeal could not proceed; the court declined to enter into the merits.
Extrahierte Begründung
The appellant did not pay the advance even within the extended deadline. Under the applicable BGG rules and the deemed-service rule, the prerequisite for proceeding was not satisfied.