So, a new treaty or not?

Here is the text of that letter from Merkozy, as the twain are now known, to Rumpy-Pumpy, as the Council President is now known. What they propose require a new treaty, which requires an IGC, though HMG is at pains to tell us that it is not so. But then, even changing a Protocol, requires a new treaty, which requires and IGC and unanimous agreement and implementation in all member states. I feel slight dizzy. Must be all that going round in circles.