(1) If it appears to the Court that determination of the question or questions common to all group members will not finally determine the claims of all group members, the Court may give directions in relation to the determination of the remaining questions.(2) In the case of questions common to the claims of some only of the group members, the directions given by the Court may include directions establishing a sub-group consisting of those group members and appointing a person to be the sub-group representative party on behalf of the sub-group members.