To attend the Joint Discussion, participants are required to register to the IAU General Assembly (GA) and pay the full registration fee for the GA. For additional information and to register, please follow the instructions at the IAU-GA registration page.

The General Assembly is intended for IAU members, but non-members are allowed to participate, after specific invitation of the International Astronomical Union. Instructions on how to obtain such an invitation will be given at the IAU-GA website.