What must accompany a request for a replacement Knox key?

The correct choice is that a request for a replacement Knox key must include an explanation of the situation. Providing context about why the replacement is necessary is crucial for accountability and to ensure that proper procedures are followed. This explanation helps the reviewing authority understand the circumstances surrounding the loss or need for a replacement of the key, which is important given that Knox keys are used for emergency access to locked structures.

Having a detailed explanation allows the fire department to track key usage and to ensure that keys are not being misused or replaced unnecessarily. It promotes transparency and helps maintain the integrity of the system designed for emergency access.