Judgment_paragraph 58 · SP SpA and Others v Commission of the European Communities (T-27/03, T-46/03, T-58/03, T-79/03, T-80/03, T-97/03, T-98/03)

58The reference to international law, and in particular to Articles 54 and 70 of the Vienna Convention, fails to have regard to the sui generis nature of the Community legal order (Case 6/64 Costa [1964] ECR 585 and Joined Cases 90/63 and 91/63 Commission v Luxembourg and Belgium [1964] ECR 625). The indivisibility of the Community legal order and the lex specialis to lex generalis relationship between the ECSC and EC Treaties mean that the consequences of the expiry of the ECSC Treaty are not governed by the rules of international law but must be assessed in the light of the provisions existing within the Community legal order.