The nearly 10-year legal battle over the class action lawsuit alleging sex discrimination at Wal-Mart stores is now before the Supreme Court.

Wal-Mart’s petition in Wal-Mart Stores v. Dukes challenging the class certification of more than 1 million female former and current workers was filed Wednesday by Theodore Boutrous Jr., a co-chair of Gibson, Dunn & Crutcher‘s appellate and constitutional law practice. The certification and the claims for monetary damages, he asserts, violate due process and federal rules of civil procedure, and conflict with other circuits and Supreme Court precedents.