In what circumstances will the court grant a motion to certify a class action?

In the matter before us, the court held several hearings, in accordance with subdivision (c) of section 1781, to determine if a class action was proper. On December 14, 1976, at the conclusion of its third hearing, the court ruled, among other things, that petitioner's motion to certify the class action would be granted. Then, on its own motion the court [75 Cal.App.3d 127] reopened the hearing to reconsider its ruling in light of Blue Chip Stamps v. Superior Court, 18 Cal.3d 381, 134 Cal.Rptr. 393, 556 P.2d 755.

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