The Ninth Circuit recently issued an opinion that could shape how companies draft and revise two oft-encountered types of contracts: terms of service agreements (“TOS”) and arbitration clauses.

In Jackson v. Amazon.com, Inc., the Ninth Circuit affirmed the district court’s order denying Amazon.com, Inc.’s motion to compel arbitration in a case brought by a proposed class of “Amazon Flex” drivers. Amazon Flex is a delivery program run through a smartphone app that Amazon uses to engage individuals to make Amazon deliveries in their personal cars.