The Member States 25 March 1957, Consolidated version of the Treaty establishing the European Atomic Energy Community#TITLE II - Provisions for the encouragement of progress in the field of nuclear energy#CHAPTER 3 - HEALTH AND SAFETY#Article 39

Article 37 Each Member State shall provide the Commission with such general data relating to any plan for the disposal of radioactive waste in whatever forms will make it possible to determine whether the implementation of such plan is liable to result in the radioactive contamination of the water, soil or airspace of another Member State.