Key legal question
Whether the lower authorities had to examine the complaint about immissions and possible excessive noise from the culture hall.
Extracted holding
Yes. The permitting authority must verify compliance with the building permit and whether the noise forecasts underlying the permit have proved accurate; it should also address whether further measurements or measures are required.
Extracted reasoning
Under Art. 36 LSV and § 61 KBV, the enforcement authority must determine exterior noise immissions when exceedance is expected and may not postpone essential environmental assessment until after operation. Post-construction control measurements and later additional emission-reducing measures remain possible.