There's laws and there's laws and there's laws and there's laws, all designed to prevent us from hurting ourselves.
If you want to register the boat there will be certain compliance regulations which will have more to do with revenue collection than real boating safety. Check with your state's transport office.
If you want to do it, just do it. The surfers have been doing it forever and the base jumpers are doing it daily.
No offence meant, just responding on the forum, but if you really are a stoned pirate, why did you ask the question? Maybe you are just stoned.