The EP negotiators, Joseph Daul MEP (chair of the Conference of Committee Chairs) and Richard Corbett MEP (rapporteur of the Constitutional Affairs Committee), bargained with the Council for several months, following the initiative taken, at Corbett's behest, by the then UK Council presidency (under a UK Labour government—Corbett is a Labour MEP) in the autumn of 2005, to re-open the subject and seek an agreed solution with the Parliament.
Finally, in 2005 and 2006, he and Socialist MEP Richard Corbett were Parliament's representatives for a new round of negotiations with the Council and Commission on comitology, giving Parliament, for the first time, the right to block the adoption of Commission implementing measures.