Question juridique clé
Whether a material expropriation claim must be assessed based on the final entry into force of the ownership restriction
Solution extraite
Yes. The decisive date is when the ownership restriction entered into force and became final.
Motifs extraits
For material expropriation, the court looks to the legal and factual situation at the time the restriction takes effect. Here, the individual decision creating the protected zone became final only at the end of September 1991.