Apparently no one noticed that the OP is shown as being in Alabama!
I really doubt that he is greatly interested in what the Canadian laws are, nor is he interested in what the laws of other states are. Reciprocity takes care of that.
However, a working knowledge of how the system works, and what maintenance is required, is, IMO, absolutely essential. No, the driver does not need to know how to overhaul anything in the system, but having knowledge of the components of the system and where they are located could be quite handy. That knowledge is readily available from the unit manufacturer, the state licensing bureau, and on the internet.
If one chooses to be the Poster Boy for the Uninformed Drivers of the world, so be it. He or she is happy that way, and the only thing for the rest of us to do is endeavor to stay out of the way.