Yes.. I think rule 41... the Outside Help rule does the job...

but fact is... the SI 's and NOR's usually reflect the ancient custom of radio communications limitations and put that into the regatta specific documents... (see tradewinds USSA documents).

What this language wants to mean... (eg Rule 41) gets lost in the creative syntax of the OA/PEO for some reason who keep the old provision in the current SI/NOR.

The throwable and certification issues are just one of those catch 22's of life... you get the choice... nullify or comply.... and a choice as a competitor... protest or not.

The A class prohibits any communication device on the boat. and the class has not been quick to get the language updated.
In part because there is a legit debate on what technology to allow... and a casualty is the communication device blanket ban... when rule 41 ... no outside help would be enough to solve the basic problem.

I don't know of any other class specific issues that fleets typically nullify. Last one might have been the F18 class's furler rule... or perhaps the F18 unresolved batten pocket rule.