Question juridique clé
Whether the compensation claim for material expropriation was time-barred under cantonal law.
Solution extraite
The one-year period began with the final refusal of the building permit, not with earlier planning steps; the action was therefore timely.
Motifs extraits
Because the definitive and hearing-compliant restriction was only fixed by the refusal confirmed by the State Council on 20 May 1988, the claim filed on 18 May 1989 was within the period of Art. 119(1) LEx.