There is a political row going on at present involving the leading lights in UK politics and in the EU over what may or may not be done and the laws involved.
Necessarily the media has to keep it simple. There are some blogs, notably EU Referendum, who say it is very complicated and too few, if any, of our UK political leaders either know or understand the legal basis of the EU.
This link may help you fathom the nature of some of the complexities, if you have a year or more to spare trudging through it all.
This is but one academic department. Out there must be dozens, if not hundreds of them. If you want specifically a Barroso take on things there is a 2011 thesis to help you.
The download for the thesis by Luis Barroso on The Problems And The Controls Of The New Administrative State of the EU is here giving you 175 solidly written pages of text about the joyous and fun lifestyle of EU administrative law.
Well, up to a point, Lord Copper. How did we get into this? How do we get out of it? How on earth can you run economies on this basis? How on earth can you run anything?
Come back King Philip II of Spain, all is forgiven.