This Law Firm Publication by Stoel Rives LLP discusses Jennifer Augustus v. ABM Security Services, Inc., in which the California Supreme Court concluded that employers may not implement "on-call" rest breaks for their employees. This holding led to the reinstatement of a $90 million judgment against an employer that had required security guards to carry radios during rest breaks in order to respond to emergencies. While California law does not explicitly prohibit on-call rest periods, an examination of the state's rest and meal period break laws and labor laws led the court to determine that on-duty and on-call rest periods are prohibited and to mandate that rest periods be off-duty.