Legal restrictions concerning who can and cannot operate a boat, with or without an adult, differ from state to state. Generally, anyone younger than 17 years old cannot operate a boat without adult supervision. Be sure to check your state boating laws for individual regulations. Anyone caught operating a boat without his or her required boating safety course certification may be subjected to a fine.
Once you click on the hyperlink above, make sure to select "Choose your state", and then select your certification state.
After Selecting your State, you will be brought to its landing page and on the right-hand side there will be an option for that state's general boating regulations.