Whether the appeal against the cantonal interim ruling was admissible under Art. 93 BGG
The appeal was inadmissible because no irreparable legal harm and no basis for an immediate final decision were shown.
The challenged decision concerned only procedural prerequisites. Passivlegitimation is a substantive issue, not a procedural prerequisite; it can be challenged with the final judgment. The cantonal court made no factual findings allowing the Federal Court to decide the merits itself.