(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.