Unknown administrators decide whether something the member states want to do is in accordance with the Treaties. And their analyses are secret as you can see in this document as one of the many examples I have come across.
From what I have heard, the Council legal service slows down international negotiations because it first has to approve draft texts that the member states or the Council presidency want to sign or use as EU compromise proposals.
From what I can see in the documents it looks like the Council legal service is proactively shaping what the EU can do or not do:
"The representative of the Legal Service intervened in order to recall certain general principles applicable to the delegation of implementing powers to the Commission, and outlined some drafting suggestions in that regard." (source)As you can see, the civil servant is telling the member states what they should do, he teaches them about "the principles", acting as if s/he was the guardian of the Treaties.
The Council legal service thus shapes the future law-making of the Union, but all we see from it is empty documents or documents where the most relevant parts are deleted: here, here, here or here.
What legitimacy do these people have to massively influence the Union, to decide over whether something may be done or not? Who is controlling this dark force hidden behind the opaque walls of legal secrecy? Who are these people?
PS.: If anyone has some interesting stories on how the Council legal service influences the EU's decision-making, please share them with us!