Kernrechtsfrage
Is the administrative appeal admissible alongside the constitutional complaint?
Extrahierter Entscheid
Yes. The administrative appeal is open because the case concerns federal planning and environmental law; the constitutional complaint has no separate scope once the administrative appeal is decided.
Extrahierte Begründung
The Federal Supreme Court examined admissibility ex officio. Because the contested decision was based inter alia on federal law, the administrative appeal was available, and the constitutional complaint became redundant as to the constitutional grievances.