Which of the following is required for the physical access control system according to CIP-006 R3?

The requirement for the physical access control system according to CIP-006 R3 necessitates that testing and maintenance be performed every 24 months. This is critical for ensuring that physical security measures are functional, reliable, and capable of providing the necessary protection for critical assets. Regular testing and maintenance are essential components of a robust security framework, as they help identify vulnerabilities, ensure compliance with standards, and confirm that access control systems are operating as intended. By mandating this time frame, the standard emphasizes the importance of maintaining physical access controls, thus contributing to the overall security of critical infrastructure.

In contrast, other options do not align with the specific requirements outlined in CIP-006 R3. While weekly checks, monthly updates, and annual audits may be considered good security practices, they do not fulfill the exact stipulations established by this regulation regarding the timing of maintenance and testing.