While reading this, I was struck by a couple of rules about dagger/centerboards which seemed confusing. Since the legal experts are presumably on this thread, it seems like a good time to ask...

a) Curved/'Banana' boards will not be allowed.

How is "curved" defined here? Is this a requirement that the leading edge, or trailing edge, or quarter-chord be straight? Or does the rule refer to boards whose planform is curved so that they act somewhat as hydrofoils? (The latter would make more sense, I guess.)

c) Fore/aft movement of the boards when in the down position will not be allowed.

This rule would seem to prohibit centerboards, but I'm sure it is meant to say something else...? Particularly significant for those of us who often sail in shallow water and/or around lots of weeds.