Kernrechtsfrage
Whether the constitutional complaint is admissible despite non-payment of the court advance within the extended deadline.
Extrahierter Entscheid
The complaint is inadmissible because the appellant failed to pay the advance or prove timely payment as required after the warning of non-entry.
Extrahierte Begründung
After the non-extendable grace period under the Federal Supreme Court Act expired without cash payment, postal deposit, or proof of debit confirmation, the court had to refuse entry under the warned consequence.