Any individual can sail in any event that they like that is not associated with, connected with, or in any way, under the control of yachting Australia without it being any business of theirs. The only things that they have any control over are events that specifically come under their auspices ie class's, clubs, sailors, and class associations who atually put them selves under the ultimate control of yachting australia by the act of becoming affiliated with YA. It should be obvious that YA cannot possibly have "control" over any one , class, club, organisation unless YA has previously gained the authority from those people etc, by them actually giving YA that control over them. Without that affiliation it would be like YA saying that they had complete control over ALL boats, clubs, sailors, and waters that were sailed on, simply because they (YA) say they do! nice thought for Yachting Australia, BUT it doesn't work that way with in the law. And if YA was to put down some stipulation that some non affiliated sailor who sailed at some non affiliated club or non affiliated event, could be penalised at some later date if they were then competing at a YA sanctioned event, I'm pretty sure that the resulting compensation claim would send YA broke forever! For years Hobie conducted "non Sanctioned WORLD TITLES" at which many Australians (and other nationals) who were at the same time financial members of clubs affiliated with YA, sailed at, placed at, and won, and later many of those sailors went on to compete at state, national, international, and olympic level, in other class's, and not one of them was ever even threatened with any form of sanction, WHY, because it is outside of the powers of discrimination of Yachting Australia or any other Yachting authority. It isn't "law" just because some one say's it is, it's only law when its proven in court.
By joining a yacht clud and paying the prescribed fee, a sailor automatically becomes REGISTERED with YA and becomes the beneficiary of certain benefits (ie so called insurance), but this doesn't mean that YA can dictate to you what type of boat you can sail, where you can sail it or what you called any type of trophy that you win (you could call it the "greatest sailor in the universe" event if you liked) and YA would not batter an eyelid, let alone try to bring forth some draconian disipline that they have no authority for. Yachting Australia (or for that matter NO BODY else) holds the exclusive, registered copy right to the term "National Title" and untill/if some one does it is a title that is free for any one to use, whether deserved or not.
It is not necessary for there to be affiliated associations in all/other states. there could be only one - the association that is the governing body for the whole of Australia, or it could be taken further, there could be the one world association which governs the "class" world wide. But it is usual for there to be many, smaller affiliates such as state associations, using the same constitution and abiding by the same class rules etc, as it becomes very difficult, even impossible, for a national controling body to govern every state from one location. How do they set such simple things as social events in WA if the national body is in say NSW. Similarly at which clubs do the sailors sail the state heats for F16 in Tasmania.