Question juridique clé
Whether the denial of concession renewal violated the appellant's trust-protection rights under Art. 9 BV based on the municipality's 1995 letter.
Solution extraite
No protected reliance claim was established because the 1995 assurance was only conditional, required unfulfilled noise-reduction measures, and no unrecoverable detrimental reliance was proven.
Motifs extraits
The court found no unconditional commitment, accepted the lower court's assessment that effective noise measures were not shown, and held that alleged investments were unproven or not causally tied to the assurance; one argument was also an inadmissible new allegation.