The F16 class has no power to enforce anything outside of its own events (or ones sanctioned by this class). It can not prevent boat owners from getting a separate measurement and rating and submitting that at open events (= not organised under the F16 class banner).
That is a fact of life that all Formula classes including the F18's and A's have to live with. I for one know of several Tigers that race of a different rating as the F18's. Some F18's forget to use the small suit of sails when participating in open events. For some reason nobody seems to care there, but when some Viper owner does it ... ... then the sky is falling.
You are smart enough to realize that you are asking the impossible in your earlier posting.
Wouter
Wouter Hijink Formula 16 NED 243 (one-off; homebuild) The Netherlands