Questione giuridica chiave
Whether the Solothurn appeal commission was competent to hear the appeal against interieursuisse's fee decision.
Decisione estratta
The case had to be sent back for clarification because it remained unclear whether interieursuisse had been granted decision-making power under cantonal law; if not, the lower-court legality would fail for lack of subject-matter competence.
Motivazione estratta
Federal law does not itself provide decision-making power for the professional association in this context. The cantonal legal basis had not been examined, so the appellate court had to investigate that issue first.