As of January 1, 2018, anyone under the age of 21 must carry a California Boater Card when operating any motorized vehicle on state waters, including powered sailboats and paddlecraft. California State Parks Division of Boating and Waterways will issue the lifetime cards to those who show proof of passing an approved boater safety exam. A lifetime card will cost $10. There is a phase in schedule such that ALL persons regardless of age must carry a Card by 1 January 2025. Visit www.californiaboatercard.com for details, and for links to approved safety classes. I took my course on-line through Boat US Foundation. Didn't need to do it now (I'm old enough to wait until 2025), but figured I had better do it while I still have my wits about me.