If you're planning on expanding into Canada, you might as well be ready for that now. That way you won't have any problems transitioning (like not being able to sell old stock in Canada because the labels aren't updated). The numbers can be pretty small and out of the way.
As far as I know Mexico doesn't have a registration system. Off the top of my head Canada and the United States are the only places I know with them, though I think there are probably a couple more (it's a big world).
As far as I know Mexico doesn't have a registration system. Off the top of my head Canada and the United States are the only places I know with them, though I think there are probably a couple more (it's a big world).