Generally, WARN requires employers with 100 or more full-time workers to give employees 60 days notice in advance of plant closings and mass layoffs if they:
- Close a facility of 50 or more workers
- Discontinue an operating unit of 50 or more workers
- Lay off 50 to 499 workers and these layoffs constitute 33% of the total work force at a single employment site
- Lay off 500 or more workers at a single employment site
Although some businesses are exempt from WARN, the law encourages all employers to give workers sufficient notice to the extent possible.
When WARN is required, notice must be given to:
- Each employee to be laid off, or the employee’s union representative, if represented by a union or unions,
- the chief elected official of the unit of local government where the closing is occurring (mayor),
- the state’s rapid response coordinator.