Rule 20. On the waters of the Grand river, sections 16 and 21, T8N, R16W, city of Grand Haven, Ottawa county, from buoy no. 14, which lies 600 feet, more or less, upstream from U.S. 31 highway bridge, westerly to the west shore, and along the westerly shore to the entrance of South channel and when within 300 feet of the shoreline, it is unlawful for the operator of a vessel to exceed a slow-no wake speed.
Mich. Admin. Code R. 281.770.20