I Corbett-betænkningen er der to mål. På den ene side at præcisere, at når medlemmer danner en gruppe, tager Parlamentet gruppens politiske tilhørsforhold for givet, medmindre de specifikt nægter det.
The Corbett report has two objectives: first, to clarify that when MEPs decide to form a group, Parliament accepts their political affinity as a given, unless it is expressly denied; secondly, to increase the participation of Non-attached Members in the Conference of Presidents and the preparatory meetings.