Key legal question
Whether the complaint against the Solothurn assessment was still pending after the later objection decision
Extracted holding
The challenge against Solothurn had become moot because the objection decision replaced the assessment and no separate constitutional complaint was filed against it.
Extracted reasoning
The original assessment was superseded by the objection decision; the earlier complaint could not be cured by mere supplementation after the court had expressly indicated the need for a new complaint.