Just to clarify, Adventure Sports Miami does have and has had the new production (gold graphic) RSX Mrk 2 fins in stock for several weeks now. They've been selling them in the days leading up to the Miami OCR. So there are no excuses even if you did leave reading the RS:X Class Rules to the last minute.
By the way, it should be noted that ISAF Sailing World Cup events will all have equipment inspectors this year. They will be armed with a hot list of items to check provided by the RS:X Chief Measurer. You have been warned.