Mass Layoffs and Plant Closings - Covered Employers

In general, employers are covered by the federal WARN Act if they have 100 or more employees, not counting part-time employees who have worked less than six months in the last 12 months and not counting employees who work an average of less than 20 hours a week.¹ The federal WARN Act also applies to employers who employ 100 or more employees who together work at least 4,000 hours per week.²

Under California law, employers who directly or indirectly own a covered establishment must give notice to affected employees of the covered establishment. A covered establishment is any industrial or commercial facility or part thereof that employs or has employed 75³