The U.S. Supreme Court ruled Tuesday that Amazon does not have to compensate warehouse workers for the time they spend going through security checks at the end of their shifts, the Associated Press' Sam Hananel reports. The justices held that the security checks are not related to workers' primary job duties. Under the federal Portal-to-Portal Act, employers are exempted from paying for " pre- and post-work activities such as waiting to pick up protective gear or waiting in line to punch the clock," Hananel further reports.