Legally we are required to register efoils, and foil assist’s in most states. I only know of people actually registering efoils.
I have been asked to get out of the water by the Del Mar and Solana Beach Lifeguards a few times over the past year and half.
For California :
If you own a sailboat over eight feet long or a boat vessel with a motor (no matter the size), you must register it with DMV in order to legally operate it on California waterways.
In California, you are not legally required to have boat insurance to register a vessel with the DMV or to operate it on public waterways.
California State law mandates a 5 mph speed limit for any motorized vessel within 200 feet of a beach frequented by bathers or within 100 feet of any person in the water.
California Boater Card
By 2025, all persons who operate on California waters will be required to have one. The lifetime card fee is $10. The lost card replacement fee is $5. The card is issued by the California State Parks Division of Boating and Waterways (DBW). Once DBW has received your application, proof of education and payment, you will receive a 90-day temporary boater card by email. You should receive your official boater card by mail within 30 days from the time the application was approved.
California age restrictions for operating a motorized vessel: According to California Harbors and Navigation Code Section 658.5, NO person under 16 years of age may operate a boat with a motor of more than 15 horsepower, except for a sailboat that does not exceed 30 feet in length or a dinghy used directly between a moored boat and the shore (or between two moored boats).
Life Jackets: Every person on board a PWC and anyone being towed behind a vessel
must wear a Coast Guard-approved Type I, II, III or V life jacket.
Solana Beach prohibits the operation of personal watercraft (PWC) and motorized vessels in a way that endangers others in the surf zone.
B. No person shall paddle, ride or use a surfboard, paddle board, sail board, boat, or any other hard surface flotation device in any area designated by the captain of lifeguards, or his designee, for the exclusive use of swimmers. This section shall not apply to any lifeguard or other emergency service personnel.
C. No person shall operate, launch or land a jet ski or other type of propeller powered or jet-powered vessel or boat within the surfline. This section shall not apply to any lifeguard or other emergency service personnel.
D. No person shall launch or land any boat or vessel of any nature at Fletcher Cove Park.