With the first “suitable seating” class action under review by a trial judge in San Francisco, the U.S. Court of Appeals for the Ninth Circuit has decided to weigh in on a related case against Wal-Mart Stores Inc. that could be worth more than $150 million.

The appeals court on Tuesday agreed to review class certification of roughly 22,000 Wal-Mart cashiers in California who claim they were denied a place to sit in violation of state labor regulations.