Member States which, before 1 January 1958 or, for acceding States, before the date of their accession, have concluded agreements with third States providing for cooperation in the field of nuclear energy shall be required to undertake jointly with the Commission the necessary negotiations with these third States in order to ensure that the rights and obligations arising out of such agreements shall as far as possible be assumed by the Community.
Any new agreement ensuing from such negotiations shall require the consent of the Member State or States signatory to the agreements referred to above and the approval of the Council, which shall act by a qualified majority.