No, he's saying that there's no requirement that sail numbers be "Hobie" sail numbers. Just because something has a Hobie part number, doesn't make is it the only alternative for racing.

What about stock tiller extensions vs. Hot Sticks? Rivets? Bolts? Screws? Shackles? Pins? Keeper rings?

All of these have Hobie part numbers, but you don't have to buy them from Hobie to have your boat still be class legal.

Man, you take this stuff way too seriously.