What is the test for certifying an action as a class proceeding?

Pursuant to s. 4(1) of the CPA, there are five separate requirements that must be met before an action will be certified as a class proceeding. Whether the pleadings disclose a cause of action is reviewed by applying the rule that a pleading should not be struck unless it is plain and obvious that no claim exists. The remaining four certification requirements are reviewed by considering whether there is “some basis in fact” for each of the requirements: Hollick v. Toronto (City), 2001 SCC 68 at para. 25. If the plaintiff discharges this burden, the action must be certified.