The U.S. Court of Appeals for the Third Circuit has upended the grant of class certification to two disability rights advocates who sued the Steak ‘n Shake chain for lack of handicap accessibility to its restaurants.

Chief Judge D. Brooks Smith wrote in the court’s opinion that the plaintiffs failed to meet a procedural requirement, Federal Rule of Civil Procedure 23(a), and thus the case had to be sent back to the lower court for further review.