Ans. The Olympiad is contested by teams from the participating nations, which are made up of National Olympiad winners and prizewinners from the previous International Olympiad. Participants in the Olympiad are not permitted to attend any higher education institutions.The Olympiad member-states' departments of the EAAS (or, in their absence, other astronomical societies, leading observatories, astronomical departments of universities, education ministries, and other competent bodies of these countries) are allowed to form the Olympiad member-states' teams.