Which of the following situations could trigger WARN Act notice requirements?

The Workforce Adjustment and Retraining Notification (WARN) Act requires employers to provide a 60-day advance notice of plant closings and mass layoffs to affected employees and local government authorities. The specific requirement that triggers WARN notices is tied to the number of employees laid off, particularly when it involves 50 or more employees at a single employment site within a 30-day period.

In the given situation, terminating 50 employees at a single customer location meets the mass layoff criteria established by the WARN Act. This would necessitate notification because it represents a significant employment reduction and directly affects the workforce at that location.

The other situations do not meet the WARN Act thresholds: a reduction in pay does not constitute a layoff or closure; a merger may not necessarily lead to mass layoffs or closing; and completing a short-term project typically does not involve a significant enough workforce reduction to trigger a WARN notice.