What water bylaw
According to the by law resedential properties can water 4am to 9am Monday, Wednesday and Friday for even numbered addresses and Tuesday, Thursday and Sunday for odd numbered residences. Non residential addresses from 1am to 6am Monday and Wednesday for even numbered addresses and 1am to 6am Tuesday and Thursday for odd numbered addresses. Non residential can also water 4am to 9am Friday. So what gives City Hall the exemption.
The city hall roof has its own complete sprinkler system and it seems that the laws don't apply.