Governor Newsom just signed Senate Bill 617 into law on October 1, 2025, expanding California’s Worker Adjustment and Retraining Notification (Cal-WARN) Act. As a reminder, the WARN Act requires employers to give 60-days’ notice before a mass layoff, plant closure, or relocation. In addition, employers must notify employees and both state and local representatives.

Here are five essential points employers must understand to begin the process of meeting their obligations under the new law.