Sounds to me like the Hobie class will not implement this new rule when they (NAHCA) are the organizing authority for the regatta. ... no matter what USSA decrees in then next few weeks. They gave two pretty good reasons... (deters new racers and enforcement will detract from the event)
What more do you want?
(It would be nice if the Performance classes, the NAF18, F16's and the other classes step up and made their position clear).