Wouter,
You're right. ISAF is confused. And they have it backwards. Classes should have freedom to develop their class nationally and regionally and internationally. And if at some point they want to become an ISAF Class (although I don't know why), they will have the credentials for doing so.

In the case of our Wave Class, I asked him about becoming an international class, and he said it was very doubtful that it would ever become approved.

So, in other words, he is saying that if you can't get approved as an international class (or don't want to be an international class), you are not allowed to have world championships. And, if you do hold one, everybody who participates will be banned from ISAF and National events.

To me, that's crazy.