(Art. 8, 25 let. a and 26 WRFA)
The operator must report to the supervisory authority any occurrences of relevance to the safety of the water retaining facility; the following must be reported in particular:
without delay: safety-relevant occurrences of major significance involving serious damage to the water retaining facility or to third-party property or serious or fatal injuries to third parties;
within 24 hours: safety-relevant occurrences of moderate importance with significant damage to the water retaining facility or third-party property or minor injuries to third parties;
within 5 days: safety-relevant occurrences of minor importance with minor damage to the water retaining facility or third-party property and without injury to third parties.
The operator must notify the supervisory authorities in advance of the dates for the following:
inspection of relief and outlet works;
on-foot inspection of the water retaining facility as part of the annual and five-yearly inspections;
emptying of the facility.