1. What is the constitutional significance of the principle of conferral / attributed powers? For example: what does it tell us about the legal nature of the EU? What does it mean in practice for the EU and its policies / activities?

1. Why are "legal bases disputes" so apparently endemic to the EU legal system? What are the main principles by which the CJEU resolves such disputes?

1. What do commentators mean when they refer to "competence creep" by the EU? How can we tell apart a "legitimate" from an "illegitimate" interpretation of any given EU power?

1. Why were national parliaments given a role in monitoring observance of the principle of subsidiarity? How could their input into the exercise of EU competences be made more effective?

1. Why did the EU institutions consider it necessary to draft a "Charter of Fundamental Rights"? Why did the Member States (as "masters of the Treaties") decide to transform that Charter from a non-binding declaration into EU primary law?

1. What are the two main procedural routes by which the validity of Union acts can be scrutinised by the CJEU? Why do some commentators consider that this "twin track system" fails to offer an effective framework of judicial enforcement / protection?