14
A person must be at least 14 years of age to operate a PWC in Florida.
In Oregon you must be 18 to rent a personal watercraft.
Probably 25 and over
You must be at least age 12 and have a Washington Boater Education Card to operate a power water craft of 15hp or greater. If age 12 and you don't have that card, then you may operate the boat under the supervision of another person who is at least age 16 AND has that Washington Boater Education Card.
In Washington State, you must 14 before you can legally operate a personal watercraft.
12-15
If you have passed an approved water safety course, to operate a vessel alone in Texas, a boater must be 13 years of age to operate a vessel of more than 15 horsepower; or windblown vessel over 14 feet in length. See link for more detailed information.http://tpwd.texas.gov/faq/learning/boater_education/
Those who are required to wear a PFD or Personal Flotation Device by law depends on where you are, and is dependent on what type of water craft you are using. Typically anyone using a PWC or Personal Water Craft (i.e. Jet Ski, Canoe, Kayak etc.) is required to where a PFD. For larger water craft typically anyone under the age of 16 required/recommended, however you are always required to have enough PFDs for anybody on-board the water craft at all times, failure to do so could get you slammed with hefty fines.
13 to drive it by your self or any age if someon is one it with you that is over 18.
In Washington State, a personal watercraft livery cannot rent to a person under the age of 16. Additionally, those aged 16 or 17 must have a valid boating safety education card to operate a personal watercraft. This regulation is in place to ensure the safety of young operators on the water.
It depends on the State. In Minnesota, you must be at least 13 years of age and hold a state issued boating safety certificate (or its equivalent) in order to operate a personal watercraft without a legal operator of 18 years of age. However, operators aged under 12 years without a boating safety certificate, may continue to operate a personal watercraft as long as they are in sight of a legal operator at least 18 years of age on another personal watercraft within 500 feet.