I guess I am lost and don't understand Help.

Does this mean that:
only Hobie boats can sail in the event ?
they are going to use the F18 rules but no non Hobie F18 ?
what weights specs F18 or Hobie ?
really just means you can use after market parts on the Hobie boats ?
can it be a F18 event if non Hobie F18s can't sail in the event ?