A named class representative retains an interest similar to a private attorney general in vindicating a class claim where the class has been decertified, even if the class representative has subsequently prevailed on the merits as a private plaintiff.
A court retains the obligation throughout the litigation to sua sponte decertify a class that no longer meets the requirements of the rules; no finding of a significant intervening event is required.
The court has no sua sponte obligation to reform the class to meet the rules prior to decertification.