"For a long time, international exhibitions followed no other rule than that laid down by the country in which they were organized. [...] The internal law of the country was alone in governing each event. An exhibition was international, not because its rules of organization were deliberated jointly by countries pursuing a common cause, but for the mere fact that different countries took part in it. [...] The Convention of November 22nd, 1928 changed this situation."
Maurice Isaac, first Director of the BIE, 1936
The Paris Convention of November 22, 1928 is the legal instrument that regulates the organization of Expos. It provides the guarantees which ensure a smooth oraganization of, and participation to, these global events.
Since 1928 the BIE has updated the Convention on different occasions in order account for the shifts in the economic, social and political trends, the progress of the world and the emergence of new countries.