Title 29 › Chapter 23— WORKER ADJUSTMENT AND RETRAINING NOTIFICATION › § 2101
Sets out which companies must give notice and what counts as a plant closing or mass layoff. Employer: a business that has 100 or more employees (not counting part-timers), or 100 or more workers who together work at least 4,000 hours a week (no overtime). Plant closing: a permanent or temporary shutdown at one site that causes 50 or more full-time workers to lose work within any 30-day period. Mass layoff: a big cut that is not a plant closing and causes job loss at one site within any 30 days for either at least 33% of the workforce and at least 50 full-time workers, or at least 500 full-time workers. Representative: a union or other exclusive worker representative. Affected employees: workers likely to lose their jobs from a proposed closing or layoff. Employment loss: job end (unless fired for cause, quit, or retired), a layoff over 6 months, or cutting hours more than 50% each month for any 6-month stretch. Unit of local government: a taxing local government. Part-time employee: under 20 hours a week on average or worked fewer than 6 of the last 12 months before notice is needed. If a business is sold, the seller must give required notice up to the sale’s effective date and the buyer must give notice after that date. Workers of the seller (not part-timers) are treated as employees of the buyer right after the sale. A worker does not count as having an employment loss if the employer offers a transfer with no more than a 6-month break and the transfer is either within a reasonable commute or, if offered anywhere, the worker accepts within 30 days of the offer or of the closing/layoff, whichever is later.
Full Legal Text
Labor — Source: USLM XML via OLRC
Legislative History
Reference
Citation
29 U.S.C. § 2101
Title 29 — Labor
Last Updated
Apr 5, 2026
Release point: 119-73not60