From my hometown police department in Illinois......
I hope the Freeport law and other laws include not only not being seen but not being sensed by any others. Like I said, if I can smell it it's getting into my body. Being drugged against my will.
If I can't see someone using marijuana but the fumes are reaching me that should be against the law. But my guess is the states and counties will pass that issue to city ordinance.
BTW, what's the THC/blood limit in Freeport? Do they have a sobriety test standard yet? Let me guess, I hope I'm wrong, they didn't think of that when they wrote and passed the law. Maybe the legislature is under the influence of California politics.
I suppose we'll have to wait and see a few people get hurt or killed then figure that out.