Sunfishes - Do they require registration?

[IslandRadio]

I have a couple of old sunfish sailboats that I'd like to use up at the lake.

Do these need to be registered? I don't actually know the length of the boat (suppose I could measure it!).... but I figure the experts here will know the answer! I've sailed other sunfishes on the lake (belonging to other people), and haven't been "pulled over" for lack of registration, but I may have just been lucky.

Any ideas?

Thanks and Regards,

Steve