Question juridique clé
Whether the reform appeal against the cantonal ruling on passive standing is admissible as an interim decision.
Solution extraite
The challenge to passive standing is inadmissible because it concerns a prejudicial, not final, decision and the strict conditions for immediate appeal were not met.
Motifs extraits
A decision on passive standing does not finally dispose of part of the dispute. Under Art. 50 OG, immediate review requires that a final decision can be caused and that evidence would be lengthy and costly; those requirements were not shown.