531Meaning of major incident

531  Meaning of major incident  (1) In this Chapter, a major incident at a major hazard facility is an occurrence that:  (a) results from an uncontrolled event at the major hazard facility involving, or potentially involving, Schedule 15 chemicals; and  (b) exposes a person to a serious risk to health or safety emanating from an immediate or imminent exposure to the occurrence.  (2) Without limiting subregulation (1), an occurrence includes any of the following:  (a) escape, spillage or leakage;  (b) implosion, explosion or fire.