Very interesting on the rules nuances.
Thanks Dave for pointing out the events where protests are more likely are also the larger ones that attract international teams. Does that make them an international event? I.e how is that defined?
The best I can do at the moment is:
G1.1 (b)
at all international events, except when the boats are provided to all competitors, national letters denoting her national authority from the table below. For the purposes of this rule, inetnational events are ISAF events, world and contentinental championships,
and events described as international events in their notices of race and sailing instructions; 
