Under NISPOM, which form of supplemental protection is required for TOP SECRET storage during non-working hours unless guards were approved before 1995?

• A. An intrusion detection system
• B. A security guard only
• C. A manned guard post only
• D. A watchman with flashlight

Answer: (A)

During non-working hours, TOP SECRET storage requires automated protection that continuously monitors for unauthorized access. An intrusion detection system provides this ongoing coverage, sensing breaches through sensors and immediately triggering alarms to a monitoring center or security personnel. This automated capability fills gaps that can occur with human guards, offering rapid detection and response. The only time this isn’t required is if there was an approved guard arrangement before 1995, which can satisfy the protection requirement instead. Guard-only options rely on people and aren’t as reliable for continuous coverage, and a watchman with flashlight is outdated and lacks comprehensive detection capabilities.