http://ussa.org/about
"The U.S. Ski and Snowboard Association (USSA) is the national governing body of Olympic skiing and snowboarding. It is the parent organization of the U.S. Ski Team, U.S. Snowboarding and U.S. Freeskiing. Developed to facilitate participation in national and international competition, the Olympic sports organization provides structure for competitive skiing and snowboarding. From grassroots programs to governance of sport, management of rules, competitions and athletic rankings, the USSA oversees athletic pipelines for development in the sports. With a vision to make the USA the best in the world in Olympic skiing and snowboarding, the USSA provides leadership and direction for tens of thousands of young skiers and snowboarders who share an Olympic dream while maintaining a strong adherence to core values. The USSA, established in 1905, operates out of the national training and education facility, the Center of Excellence, in Park City, UT."
Every country has the equivlent of USSA, in Australia it is Ski and Snowboard Australia (SSA) they handle pretty much everything to do with snowsports in your country. From picking national teams, to entering people into international competitions and deciding which US location can hold which event. They also organise insurance for races and racers.
Check out the website it should explain it all to you.