The answer is readily found in Willick v. Willick 1994 CanLII 28 (SCC), [1994] 3 S.C.R. 670, as noted in J.M.B. v. A.C.B. 2006 ABCA 150: It is clear that waivers of child support are not binding on the court and that the court may intervene when there has been a unilateral change of circumstance or other proper ground to intervene in the best interests of the child: Willick v. Willick... (at para. 37)
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