Hey Tree Guy;
I think that you may be standing on the wrong side of the facts when you say a peace officer can not break the law to enforce it. There are provisions in the highway traffic act that allow for a member to do his duty in a safe manner. I have looked at it before and I know that there are provisions for a peace officer to "break the law" in the performance of their duties.
In addition, municipalities may set regulations that govern things-like parking.
So I would be pretty careful if I used that argument in court . . .