2009 U.S. Sailing Men's Championship - Flying Scot

I saw on the U.S. Sailing website that the U.S. Men's Sailing Championship in 2009 will be sailed in Flying Scot's.

U.S. Men's Sailing Championship for the Clifford D. Mallory Cup
9/23/09-9/26/09
Bay Waveland Yacht Club
Bay St. Louis, Mississippi
Boat: Flying Scot

Does anybody know how this competition works? It seems one has to submit an application and be selected to compete. Are there qualifying rounds regionally? Are competitors required to join the FSSA (that would be good for the class)?

TomT