The organizer states it is required... they have now taken basic "reasonable" steps toward governing an event that has coverage in the event of a claim. Even though they can be named a defendant still... they have taken reasonable steps.. this could sway a judge or jury they have liability in a lawsuit.
Similar to renting a car, they check to see you have a license, but don't run the license to verify it is in effect.
if they don't take these "steps"... they have not taken reasonable responsibility and probably have more liability in any claims.
