Good point.
From the class rules: "The equipment specified in the ORC Minimum Equipment and Accommodations Standards, Category 4 shall be carried on board except where those standards conflict with these rules."
Do the class rules address the safety requirements of
ISAF/ORC Cat 4 in all other regards? Skimming through the latter quickly, it seemed there might be other requirements (cockpit knife?) that are not in the rules. Anyway, it might be worth including the
ISAF/ORC reference in the NOR for class events too.