What is the required action when terminating an individual's access according to CIP-004?

The correct action when terminating an individual's access according to CIP-004 is to revoke non-shared user accounts within 30 calendar days. This requirement emphasizes the importance of timely and effective management of user access to critical cyber assets. By stipulating a 30-day timeframe, the standard ensures that access control measures are responsive to changes in employee status, such as termination, which is crucial for maintaining the security of the organization's infrastructure.

This approach is vital in mitigating potential security risks, as it minimizes the window of opportunity for unauthorized access. Effective execution of this requirement includes promptly updating access controls to reflect changes in personnel roles and responsibilities, thus safeguarding the integrity of critical systems and information.

The other options do not align with the specific requirements set forth in CIP-004. For instance, immediate revocation of shared user accounts may not be feasible depending on the operational context and security protocols in play. Notifying individuals about their account status does not address the necessity of actually revoking their access, and permanently deleting records can conflict with compliance needs for retaining certain information for auditing and historical tracking purposes.