When appropriate, a class may be divided into subclasses and each subclass shall be treated as a class.
In reaching a decision, the Presiding Officer shall consider the interests of members of the class in individually controlling the defense of separate actions, the extent and nature of any proceedings concerning the controversy already commenced against members of the class, the desirability or undesirability of concentrating the litigation in one adjudication, and the difficulties likely to be encountered in the management of a class action, as well as the benefits expected to result from the maintenance of a class action.
The orders may be combined with a prehearing order under § 1025.21 of these rules and may be altered or amended as may be necessary.
16 C.F.R. §1025.18