The United Nations, its agencies, and the International Atomic Energy Agency can attend sessions of the Conference of the Parties as observers, even if they are not parties to the convention. Additionally, any national or international, governmental or non-governmental body qualified in matters covered by the Convention can also attend as observers, unless at least one-third of attending Parties object. The rules of admission and participation of observers are subject to the rules of procedure adopted by the Conference of the Parties.