Rule 4. On the waters of Heart lake, section 20, towns 29 north, range 3 west, Otsego Lake township, Otsego county, west of a line beginning where the west line of lot 44, Heart Lake subdivision no. 2, intersects the shore of the lake and thence southerly to where the west line of lot 83, Heart Lake subdivision no. 2, intersects the shore, it is unlawful for the operator of a vessel to exceed a slow-no wake speed.
Mich. Admin. Code R. 281.769.4