Final answer:
The workplace violence policy is required if 4 or more employees are regularly employed at a workplace. This policy must be in writing and posted in a conspicuous place in the workplace. It aims to address and prevent workplace violence to ensure employee safety.
Step-by-step explanation:
According to the Occupational Safety & Health Administration (OSHA), if 4 or more employees are regularly employed at a workplace, a workplace violence policy must be in writing and posted in a conspicuous place in the workplace. Workplace violence refers to any act or threat of physical violence, harassment, intimidation, or other threatening behavior that occurs at the workplace. This policy helps ensure the safety and security of employees by addressing and preventing workplace violence.