Negotiated terminations did not violate WARN Act.

Beginning in 1995 the International Association of Machinists and Compania Mexicana de Aviacion, S.A., began renegotiating their collective bargaining agreement. In late 1997 the negotiations stalled when Mexicana insisted upon a "buy out" that would allow it to outsource work performed by the agency of union employees. On January 30 1998 Mexicana informed the union that it would terminate certain employee beginning April 3 1998 The notice stated that it was being made beneath the Worker Adjustment and Retraining Notification Act (WARN). The WARN Act requires an employer to give its