Key legal question
Whether the public-law appeal against recognition of party-plaintiff status was admissible immediately.
Extracted holding
No. The contested cantonal decision was incidental and caused no irreparable legal harm; it could only be challenged together with the final decision.
Extracted reasoning
A decision granting a third party party-plaintiff status is incident and, under Article 87 OJ, is not separately appealable absent irreparable legal damage. The appellant showed no special circumstance justifying immediate review.