What should happen within 30 calendar days for deviations from the baseline configuration?

The requirement to update the documentation concerning the deviation within 30 calendar days aligns with the principles of effective configuration management and compliance within the NERC Critical Infrastructure Protection (CIP) standards. When a deviation from the baseline configuration occurs, it is crucial to maintain accurate documentation to reflect the current state of the system. This ensures that all stakeholders are aware of the changes, which can include modifications to system settings, components, or even operational procedures.

Accurate and up-to-date documentation allows for better management of security controls and enhances the ability to respond to audits or reviews. It also provides a clear historical record of changes, which is essential for troubleshooting and continuing risk assessments. By formalizing the process of documenting these deviations, organizations help ensure that they remain compliant with regulatory standards and are prepared for any required inspections or validations of their cybersecurity posture.

Maintaining this documentation is vital for the consistent application of security measures and for fostering a culture of accountability within the organization, making option B the most responsible and compliant action to take within the specified timeframe.