No occupant of any vessel underway on the waters in this Municipality shall sit, stand or walk upon any portion of the vessel not specifically designed for that movement, except when immediately necessary for the safe and reasonable navigation or operation of the vessel. No operator of a vessel underway on the waters in this Municipality shall allow any occupant of the vessel to sit, stand or walk on any portion of the vessel underway not specifically designed for that use except when immediately necessary for the safe and reasonable navigation or operation of the vessel. (ORC 1547.22)