In Morris v. Ernst & Young, No. 13-16599, (9th Cir. 2016), the U.S. Court of Appeals for the Ninth Circuit held that an employer violates Section 7 and Section 8 of the National Labor Relations Act by requiring employees to sign agreements that preclude them from bringing a concerted legal claim regarding wages, hours, and terms or conditions of employment.
There have been various news reports including U.S. appeals court strikes down Ernst & Young class action waiver (CNN); and, Mandatory Class Waivers Struck Down By 9th Circuit (Lexology).