The federal transportation regulator is considering changing its rules to allow boats under 400 gross tonnes certified for fewer than 15 passengers to discharge their toilet tanks within one nautical mile (about 1.8 kilometres) from the shoreline, down from the current three-nautical mile limit.
http://www.theprovince.com/news/Vancouver+beaches+risk+pleasure+boats+allowed+dump+toilet/10758971/story.html