Art. 220 EEC

Member States shall, in so far as necessary, engage in negotiations with each other with a view to ensuring for the benefit of their nationals:

— the protection of persons as well as the enjoyment and protection of rights under the conditions granted by each State to its own nationals;

— the elimination of double taxation within the Community;

— the mutual recognition of companies within the meaning of Article 58, second paragraph, the maintenance of their legal personality in cases where the registered office is transferred from one country to another, and the possibility for companies subject to the municipal law of different Member States to form mergers; and

— the simplification of the formalities governing the reciprocal recognition and execution of judicial decisions and of arbitral awards.