Pete, as Mark indicated it's a pretty straight forward process to get a provisional number and I'm sure it will work the same as when the F20c number was created. The F20na class will also provide the spec to the DPN committee so it will be known to all what is being rated and what isn't.

For the short term they probably don't even need a provisional number. As long as the custom sails are the same sail area as the stock sails it's only a .995 hit which is pretty small.