1. See further K. Inglis, ‘EU Enlargement — Membership Conditions Applied to Future and Potential Member States’ in K. Inglis and A. Ott (eds.), The Constitution for Europe and an Enlarging Union: Unity in Diversity? (Groningen, Europa Law Publishing 2005), p. 225.
2. Communication from the Commission to the European Parliament and Council, Enlargement Strategy and main challenges 2006-2007 including an annexed special report on the EU’s capacity to integrate new members COM (2006) 649, 8.11.2006.
3. On supranationality as a sort of genuine principle: H.P. Ipsen, ‘Über Supranationalität’, in H.P. Ipsen (ed.), Verfassungsperspektiven der europäischen Integration (Baden-Baden, Nomos 1984), p. 97; see generally: A. von Bogdandy, ‘Constitutional Principles’, in A. von Bogdandy and J. Bast (eds.), Principles of European Constitutional Law (Oxford, Hart Publishing 2006) p. 59.
4. Integration as a general guideline can be detected throughout the jurisdiction of the ECJ.
5. For the development of these principles by the case-law of the ECJ, see J. Weiler, ‘The Transformation of Europe’, in J. Weiler, The Constitution of Europe (Cambridge, Cambridge University Press 1999) p. 19.