A “material change” means a change, such that, if known at the time, would likely have resulted in different terms in the order. If the matter which is relied on as constituting a change was known at the relevant time, it cannot be relied on as the basis for variation. The onus of proof lies on the applicant and the standard of proof is on the balance of probabilities (Willick v. Willick, 1994 CanLII 28 (SCC), [1994] 3 S.C.R. 670).
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