Rule 3. On the waters of the Black river, commencing at its mouth at the St. Clair river to the Grand Trunk Western railroad bridge, a distance of 8,000 feet, more or less, city of Port Huron, county of St. Clair, state of Michigan, no operator of any motorboat shall exceed a slow-no wake speed, which means a very slow speed whereby the wake or wash created by the motorboat would be minimal.
Mich. Admin. Code R. 281.774.3