No person may water-ski or tow a water skier unless the water skier is wearing a coast guard-approved type I, II, or III personal flotation device. (Added by Res. adopted June 30, 1975; Amended by Ord. 86-023 § 6, Mar. 19, 1986; Amended by Ord. 99-098 § 12, Dec. 8, 1999, Eff date Dec. 20, 1999).