Rule 5. On the waters of that portion of Lake St. Clair, city of New Baltimore, county of Macomb, state of Michigan, in a channel which extends 500 feet southerly from a harbor entrance at 42o40'21" north latitude and 82o44'17" west longitude, no operator of any motorboat shall exceed a slow-no wake speed. (See R 281.774.1 and R 281.774.2 for regulation covering the part of this lake lying in St. Clair county.)
Mich. Admin. Code R. 281.750.5