As an American, I'd like to weigh in on this. Let me go back to the OP for just a moment:
You're (Canadian Government) riding a VERY slippery slope on this for more than one reason.
- It's nearly impossible to police.
- It adds to a problem of policing, not simplifies it.
- It effects some growers, but not others.
This legislation was obviously written by somebody that has absolutely NO IDEA what they're doing. Some strains grow taller than others naturally, but net the same yields. Some strains are engineered to grow smaller, but net the same yields.
What they're trying to do is regulate how much you can grow. But this is the wrong way to go about doing it. Completely. It will be nearly impossible to justify. To wit:
What if a guy with 4 plants he scrogs and crops nets 8 ounces per plant for a total of 32 ounces and he never gets ovder the 39 inch (100cm) height. How is it that is legal but a guy that has just one plant that hits 43 inches (109cm) and nets only 6.5 ounces isn't?
What are you actually saving? What purpose does that law serve?
It's more nickel and dime bullshit that in the grand scheme of things solves nothing at all. Either you're going to let people grow plants or you are not. It's really that simple and you can't make it any more complex than that or it's simply impossible to police it.
The more complex you make a law the more impossible it becomes to police it. If you want to control yields, then you have to limit not only the number of plants, but the way in which they are grown. Even then, you're still not going to accomplish what you want.
At the end of the day, it's either legal or it isn't. Restrictions are just going to be circumvented at least and completely bypassed at most.
Tell folks they can have two plants and that's it and let it ride. Or 3. Or whatever...but the rest is just pure bullshit.