Gotta do what we gotta do to protect other waters. In spite of it all, it still has a very voluntary element to it. Mature and serious and responsible people will follow the rules. Water ballasted boats are the Typhoid Marys of our waters and they still abound, and they will sooner than later, even with all the decon etc. pollute the rest of the waters. A total ban from unpolluted waters of boats with compartments that cannot be visually examined is the only real answer. Yes, hoses etc. aren't visually examinable nor are the bowels of engines, but those areas are not overly porous and can have water flowing to clean the smooth walls. The insides of ballast tanks have many nooks and crannies for the boogers to hid.
