A fundamental element of the Seveso II Directive (96/82/EC) (as amended) and the associated COMAH Regulations (S.I. 74 of 2006) is that the Operator of a COMAH facility "take all measures necessary to prevent major accident hazards and limit their consequences for man and the environment". Current best practice in meeting this requirement is to conduct Hazard and Operability Assessments (HAZOP), and to identify major accident hazards (MAH) using the HAZard IDentification (HAZID) process.