Kernrechtsfrage
Whether the municipality's administrative appeal was admissible despite its prior agreement and lack of specific standing grounds.
Extrahierter Entscheid
The municipality lacked a sufficiently substantiated legal interest and could not challenge the detail project.
Extrahierte Begründung
It had already bound itself to the BUWAL guideline in the main proceedings and did not show why it was no longer bound or why the detail project impaired a protected interest.