Rule 13. Persons navigating, steering or controlling themselves while being towed on water skis, water sleds, surfboards or similar contrivances shall maintain a distance of 100 feet from the shoreline and from any island, raft, buoyed or occupied bathing area or vessel moored or at anchor, except when being picked up or dropped off, so long as such operation is otherwise conducted with due regard to the safety of persons and property and in a line perpendicular to the shoreline insofar as it is reasonably possible, and in accordance with the laws of this state.
Mich. Admin. Code R. 281.763.13