Who is required to hold a U.S. Ski & Snowboard Membership at U.S. Ski & Snowboard events?
To be eligible for participation in U.S. Ski & Snowboard events, all participants (Jury members, Start Referee, Finish Referee, Chief of Course, Chief of Timing, Race Administrator, Course Setters, Competitors, Forerunners and Coaches) must have a valid U.S. Ski & Snowboard membership and appropriate officials certification for their position as required. Course workers and gate judges are not required to hold a U.S. Ski & Snowboard membership.
This rule may be found in the comp guides as well.