Wait a minute, looks like you're in luck!
Reading the list, it seemed clear to me that a tire needed to be marked A/T Blizzard or AT Blizzard to comply with the regulations. But, that seemed a little unusual, and inconsistent with the way the other designations were listed.
So I decided to have a look on the French website. There it says: "Le pneu porte l’une des inscriptions suivantes : Alaska, Arctic, A/T ou AT, Blizzard, Ice, LT, Nordic, Snow (à l’exclusion de celle de mud and snow), Stud, Ultratraction ou Winter."
What a difference a comma makes! For the final word on the matter, you'll need to consult the Gazette officielle du Québec (looks like you need a subscription to do it online), but it seems more logical to me to assume the version with the comma between AT and Blizzard is the correct one.
So, it also seems that winter tires aren't really mandatory in Quebec, after all. At least not for SUVs and pickups that run All Terrain tires.
(By the way, this reminds me of a great book called Eats, Shoots & Leaves. Your fourth grade English teacher was right - punctuation is important!)