Final answer:
Employers with more than 100 employees must give a written notice 60 days in advance of plant closings or large layoffs according to legal requirements.
Step-by-step explanation:
The question pertains to a specific legal requirement for employers concerning advance notification before significant workplace changes such as plant closings or large layoffs. According to the provided information, employers with more than 100 employees are required to provide written notice at least 60 days in advance of such events. This ensures that the employees have sufficient warning to prepare for the upcoming changes in their employment status, and it allows them to seek other employment opportunities, retraining, or whatever personal arrangements they might need to make.