Rule 3. On the waters of the AuSable river, sections 3, 4 and 10, town 23 north, range 9 east, township of AuSable, and sections 33 and 34, town 24 north, range 9 east, township of Oscoda, county of Iosco, state of Michigan, from its mouth at Lake Huron upstream to the Detroit and Mackinaw railroad bridge, a distance of approximately 2 1/2 miles, 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. 281.735.3