Final answer:
Employers with more than 100 employees must provide a written notice of at least 60 days to the Bureau of Labor Statistics or relevant parties before executing plant closings or large layoffs. For regular personnel changes, a minimum of two weeks' notice is generally recommended.
Step-by-step explanation:
The question pertains to the Worker Adjustment and Retraining Notification (WARN) Act which requires employers with more than 100 employees to provide written notice 60 days before plant closings or large layoffs. This means that the employer should notify the Bureau of Labor Statistics (BOP) or relevant parties about any significant changes in personnel, specifically those related to plant closures or mass layoffs, within this 60-day timeframe. It is important for both employers and employees to adhere to these regulations to ensure smooth transitions and compliance with legal requirements. Additionally, for regular personnel changes, it's generally recommended to provide at least two weeks of notice, unless a different notice period is specified in the employment contract.