The RRS handles all of this, although as Jake says, some of these positions may not be manned at every event.

RRS 75.1 and 78.1 puts the onus on the sailors to make sure their boat is entered correctly and meets the rules, including ratings rules.

RRS 78.3 states that an event measurer shall report inconsistencies to the RC, who shall (as in, must) then protest the boat.

RRS 89 states that scoring is the responsibility of the RC. So, if the event is using a rating system, the RC is responsible to score it accordingly.

The NOR and SI guides in the RRS (Apx K and L), which are the responsibility of the OA and RC, repectively, include measurement sections that should be included for such events.

I did a quick scan of the RRS and don't see a specific reference to say whether the measurer is part of the OA, or RC, or who appoints the measurer.

In any case, I would always have the expectation that the person who enters a boat is ultimately responsible to enter the boat (and rating) correctly.

If they get it wrong, they should be asked to correct the problem. If they refuse, they should be protested mercilessly until they play along or go away, just as if they kept ignoring port/starboard rules.

Mike