http://www.bundesverfassungsgericht.de/entscheidungen/es20090630_2bve000208en.html
The idea that the Member States’ own legal personality status in external relations gradually takes second place to a European Union which acts more and more clearly in analogy to a state does not is not at all reflected in a predictable tendency, made irreversible by the Treaty of Lisbon, in the sense of a formation of a federal state that would factually be necessary at any rate. The development to date of a membership that is cooperatively mixed and is exercised in parallel might, on the contrary, be a model for other international organisations and other associations of states. To the extent that the development of the European Union in analogy to a state would be continued on the basis of the Treaty of Lisbon, which is open to development in this context, this would be in contradiction to constitutional foundations. Such a step, however, has not been made by the Treaty of Lisbon.
Some what long. on
http://www.bundesverfassungsgericht.de/entscheidungen/es20090630_2bve000208en.html
This off Andrew Duff's blog
The Union gains a single legal personality in international law across its whole competence.[46] Member states may only sign international agreements that are compatible with EU law. Parliament has to approve all agreements in fields covered by the ordinary legislative procedure, association agreements, and those with budgetary or institutional implications.
The single legal personality means that the ‘third pillar’ in the field of justice and home affairs will disappear entirely after a five year transition, with common policies in the area of freedom, security and justice, including Schengen, assimilated within the ‘first pillar’ or Community method.[47] The Commission's right of initiative in justice and interior affairs, however, is shared with one quarter of member states.
http://www.eurointelligence.com/article.581+M5aca4ee4d7b.0.html
Subject: Britannia Radio: EU arrogance: German debate on EU decision-making powers heats up: Sun: German Court decision on Lisbon Treaty rejects EP as a democratic body: MPs were urged to stand up to Brussels last night - after German judges called the EU treaty an