I got some direction from Bill Lee on obtaining an NAA license.
https://naa.aero/membership/fai-sporting-license-form/?membership=FAI+Sporting+License+only
This link will save you the digging I needed to do. It will cost you $50. It will enable you toact as a crew member if you are pressed into service at the WC.
Only if you are registered with the organizers. If you are not registered, you are welcome to be a spectator, but "pressed into service" will require registration with the team.