Mary, you may have been thinking of this:
Continental Championships
18.11 ISAF Class Associations have the sole right to hold continental championships of their
class, these being class events as defined in Regulation 26.5(f).
18.11.1 ISAF Classes holding continental championships shall obtain the approval of the National
Authority of the nation where the event is to be hosted.
18.11.2 The Continental Championship shall be a class event as defined in Regulation 26.5(f)
However I don't interpret this is quite the way that I think you may be. These regulations concern the conduct of continentals
in a recognized ISAF class . It doesn't say anything about what can or cannot be done in a class that doesn't have recognized international status with ISAF.
Mark.