Question juridique clé
Whether the EJPD could bring a public-law complaint and participate in the cantonal/intercantonal proceedings
Solution extraite
Yes. As a federal department whose field may be affected, it had standing under federal procedural law and had to be allowed to participate before the lower instances.
Motifs extraits
The complaint right of federal authorities serves uniform application of federal law; it is not limited to a specific private interest. Federal authorities entitled to appeal to the Federal Supreme Court may also use cantonal remedies and exercise procedural rights before lower instances.