The Second Report of the Advisory Committee on Major Hazards (Harvey, 1979b) presents in an appendix a set of model controls for a major hazard installation in the form of Model Conditions for a Possible Licensing Scheme for Selected High Hazard Notifiable Installations , although the report leaves open the question of whether the use of licensing or regulations is the best method of implementing such controls. The appendix is prefaced by the statement:

The conditions outlined in this appendix have been written to give guidance as to the range and scope of the requirements that might be required if a licensing scheme of control were adopted for major hazard installations with the highest hazard potential . The Committee is not yet in a position to say if certain installations should be regulated in this way until more information is available, particularly from the proposed Hazardous Installations (Notification and Survey) Regulations. It is, however, clear that there is a gradation of hazard with size and complexity of plant, and as this is increased there should be a greater degree of control and surveillance by the organisation in control of such activities. Thus this appendix has a wider application than the possible requirements for a licensing system of control. It is recommended that any organisation operating a major hazard plant, particularly one at the highest level of hazard potential, should review and satisfy itself that it could demonstrate that the requirements given below are adequately met.

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