my bad- it is 60 days
"What do I have to do?
The US WARN Act requires covered employers to provide at least 60 days advance notice of "plant closing" or "mass layoff" that would result in loss of employment by at least 50 full-time employees during any 30-day period. Employment losses for two or more groups of employees at a single site within a 90 day period may be aggregated unless the Employer can demonstrate the employment losses were the result of separate and distinct actions. Under the US WARN Act: