The competent authority is obliged to determine to the operators of operating areas in accordance with the Hazardous Incident Regulation for which operating areas or groups of operating areas may have an increased probability of incidents due to their geographical location, their distance from each other and the hazardous substances present in their facilities or these incidents may be more serious (domino effect). For the purposes of the assessment, the Authority shall, in particular:

• the information provided by the operator in the notification and in the safety report,
• the information provided by the operator following a request from the competent authority for additional information; and
• the information obtained by the competent authority through monitoring measures.

The information to be provided by the operator also includes circumstances in the immediate vicinity of the operating area that may trigger an incident or aggravate its consequences, e.g. details of neighbouring operating areas, other sites that are not covered by the Hazardous Incident Regulation, and areas and developments from which an incident could emanate or where the probability of an incident may increase or the effects of an incident and domino effects. Where the Authority has additional information, it shall make it available to the operator without delay where this is necessary for the cooperation of the operators.