Question juridique clé
Whether the federal appeal was admissible against the cantonal approval of the zoning plan.
Solution extraite
The appeal was admissible insofar as the plan contained directly applicable federal-law determinations; related planning objections could also be reviewed.
Motifs extraits
Although the measure was formally a land-use plan, it also functioned as an individual administrative act based on directly applicable environmental, forest and water-law provisions.