Generally speaking, the California WARN Act, Labor Code 1400 et seq., applies to all California employees of whom both of the following are true: The employee has been employed by the employer for at least six (6) of the twelve (12) months preceding the date on which WARN Act notification would be required; and The employer employs seventy-five (75) or more people, or has employed that many at any point within the preceding twelve (12) months.