When does the Worker Adjustment and Retraining Notification $($WARN$)$ Act apply, and what does it require?

The Worker Adjustment and Retraining Notification $($WARN$)$ Act applies to employers with at least $100$ full$-$time employees and requires these employers to provide $60$ days' notice before implementing a mass layoff or closing a plant that employs more than $100$ full$-$time workers.

The Worker Adjustment and Retraining Notification $($WARN$)$ Act applies to employers with at least $200$ full$-$time employees and requires these employers to provide $60$ days' notice before implementing a mass layoff or closing a plant that employs more than $50$ full$-$time workers.

The Worker Adjustment and Retraining Notification $($WARN$)$ Act applies to employers with at least $100$ full$-$time employees and requires these employers to provide $60$ days' notice before implementing a mass layoff or closing a plant that employs more than $50$ full$-$time workers.

The Worker Adjustment and Retraining Notification $($WARN$)$ Act applies to employers with at least $100$ full$-$time employees and requires these employers to provide $30$ days' notice before implementing a mass layoff or closing a plant that employs more than $50$ full$-$time workers.