The Member States 25 March 1957, Consolidated version of the Treaty establishing the European Atomic Energy CommunityTITLE II - Provisions for the encouragement of progress in the field of nuclear energyCHAPTER 10 - EXTERNAL RELATIONSArticle 104

Article 104 No person or undertaking concluding or renewing an agreement or contract with a third State, an international organisation or a national of a third State after 1 January 1958 or, for acceding States, after the date of their accession, may invoke that agreement or contract in order to evade the obligations imposed by this Treaty.