Final answer:
It is false; a security guard must know emergency procedures as having access to a management plan may not be sufficient in an emergency.
Step-by-step explanation:
The statement is false; it is essential for a security guard to know emergency procedures, not just to have access to the emergency management plan.
In an actual emergency, a guard may not have the time to refer to a manual, and therefore, their knowledge and quick response can be crucial. A security guard's preparation and understanding of emergency procedures contribute significantly to the safety and efficiency of a response during critical moments, aligning with the concept of a 'break glass in case of emergency' safeguard mentioned in the reference.