European Union Bill

I am intrigued to know whether the workings of the proposed Committee would have come into force when the previous Government decided, without, I believe, a debate on the Floor of the House, that the Lisbon treaty was not the same thing as the EU constitutional treaty and therefore could be signed. At that point, would his Committee have intervened, given the definitional question of whether it was an EU constitutional treaty, as Open Europe and most of the country believe that it was?