Le fardeau applicable incombant au requérant est la balance des probabilités lorsqu'une violation d'une garantie constitutionnelle est alléguée

R. v. Boston, 2013 ONCA 498 (CanLII)

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[23]      In a Charter application, the burden of proof is on the defence to establish a breach on a balance of probabilities.  In a criminal trial, the burden of proof is on the Crown to establish the guilt of the accused beyond a reasonable doubt.

[24]      In a trial with a blended voir dire, the trial judge is still required to separate the burdens and apply the appropriate onus in disposing of both the Charter application and the trial proper.