I'm sure I've asked this on the forums but can't find the answer using search and google site search. How are the 10 slots (per here: http://www.catsailingnews.com/2013/02/f18-worlds-2013-marina-di-grosseto.html) being allocated to U.S teams? I'm not planning to attend for 2013 but need to prep for a potential run at 2014.