Tout ce qui a trait à la portée d'un permis constitue une erreur de droit et non une erreur de fait

R. v. Vu, 2018 ONCA 436

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[67]      However, a person such as Mr. Johnson’s friend would be in a different position if he was mistaken as to the location where he was authorized to produce marijuana. Applying Nur and MacDonald, a mistake of fact defence would not be available to Mr. Johnson’s friend, the actual licensee, even if he was honestly mistaken as to the terms or status of his license and, as a result of the mistake, produced at an unauthorized location. Both Nur and MacDonald make it clear that a mistake as to the terms of one’s license is a mistake of law, not a mistake of fact.