Rule 19. On the waters of the Grand river, sections 16, 17, 20 and 21, T8N, R16W, city of Grand Haven, Ottawa county, from the Grand Trunk railway bridge downstream for 3,200 feet and upstream for 1,000 feet, it is unlawful for the operator of a vessel to exceed a slow-no wake speed.
Mich. Admin. Code R. 281.770.19