Identify the features of the Worker Adjustment and Retraining Notification (WARN) Act of 1989. (Check all that apply.) Multiple select question. A WARN notice should be given to employees and not their bargaining representatives. A WARN notice should be given to hourly, salaried, supervisory, managerial, and part-time employees. The WARN Act requires employers to provide their employees with notice of plant closings and mass layoffs. The WARN Act requires an employer with less than 100 employees to provide them with notice of plant closings