Which of the following is NOT a restaurant security policy?

The choice that is identified as not a restaurant security policy—the maintenance of door locks during open hours—may seem relevant to security, but it typically would be part of standard operational procedures rather than a specific security policy.

In a restaurant context, the function of door locks during business hours is generally to allow customers and staff easy access to the establishment, thus promoting a welcoming environment. Security policies primarily focus on measures that protect against theft, unauthorized access, and ensure the safety of employees and customers outside of usual operational considerations.

Conversely, the other options are clearly defined security measures. Keeping the back door locked when it's not in use is a straightforward practice to prevent unauthorized entry. Key turnover procedures during transfers and terminations ensure that only authorized personnel have access to secure areas, thereby safeguarding sensitive information and assets. A properly functioning CCTV system acts as a deterrent to crime and is crucial for monitoring activities within and around the restaurant.