[Code of Federal Regulations] [Title 36, Volume 1] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 36CFR3.20] [Page 34] TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR PART 3--BOATING AND WATER USE ACTIVITIES--Table of Contents Sec. 3.20 Water skiing. (a) The towing of persons by vessels is prohibited, except in designated waters. (b) Where towing is authorized, the following are prohibited: (1) Towing between the hours of sunset and sunrise. (2) Towing without one person (other than the operator) observing the progress of the person being towed. (3) Towing a person who is not wearing a personal flotation device. If the person being towed is wearing a flotation device not approved by the United States Coast Guard, there must be an approved personal flotation device readily available in the towing vessel. (4) Towing or being towed in channels or within 500 feet of areas designated as harbors, swimming beaches, or mooring areas, or within 100 feet of a person fishing or swimming, or a diver's marker.