Kernrechtsfrage
Whether the constitutional complaint was admissible against the cantonal cost order.
Extrahierter Entscheid
No. The cost order was still subject to a cantonal cost appeal to the Obergericht of Solothurn, so the decision was not final at cantonal level.
Extrahierte Begründung
A subsidiary constitutional complaint lies only against final cantonal decisions. Because the challenged costs issue was expressly open to a further cantonal remedy, the Federal Court could not enter into the complaint.