The Hazardous Incident Ordinance regulates the protection of humans and the environment against the consequences of sudden incidents at technical installations caused by the escape of hazardous substances. Hydrogen is to be classified as a hazardous substance within the meaning of this Ordinance. According to the 12th BImSchV Annex 1, the quantity thresholds are 5 tons (lower class operating areas) and 50,000 tons (upper class operating areas) of hydrogen.