Amazon's argument wasn't that the FLSA prohibited state suits; it was about interpretation of Nevada state law. Specifically, Nevada had defined "work" to be "w

Amazon's argument wasn't that the FLSA prohibited state suits; it was about interpretation of Nevada state law. Specifically, Nevada had defined "work" to be "whatever the definition of work is under the federal FLSA". The appeals court ruled that, since the FLSA said the security checks exception was specifically an exception, it was still legally defined as work, and Nevada had not adopted the federal exceptions.