The water skiing tow boat must have at least two people onboard including an observer. Both the operator and the observer must be at least twelve years of age. In certain marked areas, water skiing is not allowed. Tow lines may not be more than 75 feet in length, except when barefoot skiing when a tow line 100 feet in length may be used. Except for taking off from shore and landing, the towing boat must stay at least 100 feet from shore, piers, bridges, people in the water, and other passing boats.
Water skiing is permitted only between sunrise and sunset.
See the Regulations for Specific Waters section for special rules about towing tubes and similar devices in the Upper Potomac River. A person loses consciousness or receives medical treatment beyond first aid or is disabled more than 24 hours. A person disappears from the vessel under circumstances that indicate death or injury. A civil penalty may be imposed by the USCG for this offense. Vessels 16 feet in length or less, propelled by a motor of 7.5 h.p.