NIST 800-53 REV 5 • SYSTEM AND INFORMATION INTEGRITY
SI-1 — Policy and Procedures
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Supplemental Guidance
System and information integrity policy and procedures address the controls in the SI family that are implemented within systems and organizations. The risk management strategy is an important factor in establishing such policies and procedures. Policies and procedures contribute to security and privacy assurance. Therefore, it is important that security and privacy programs collaborate on the development of system and information integrity policy and procedures. Security and privacy program policies and procedures at the organization level are preferable, in general, and may obviate the need for mission- or system-specific policies and procedures. The policy can be included as part of the general security and privacy policy or be represented by multiple policies that reflect the complex nature of organizations. Procedures can be established for security and privacy programs, for mission or business processes, and for systems, if needed. Procedures describe how the policies or controls are implemented and can be directed at the individual or role that is the object of the procedure. Procedures can be documented in system security and privacy plans or in one or more separate documents. Events that may precipitate an update to system and information integrity policy and procedures include assessment or audit findings, security incidents or breaches, or changes in applicable laws, executive orders, directives, regulations, policies, standards, and guidelines. Simply restating controls does not constitute an organizational policy or procedure.
Practitioner Notes
Create and maintain a policy that tells your organization how to keep systems and data accurate, complete, and trustworthy. This covers patching, malware protection, monitoring, and ensuring data is not tampered with.
Example 1: Write a System and Information Integrity policy that covers patch management timelines, antivirus requirements, system monitoring, and error handling. Store it in SharePoint with version history and assign an owner who reviews it annually.
Example 2: Use the M365 Compliance Manager to track your SI family controls. Upload your policy document as evidence, assign action items to responsible teams, and set up review reminders to keep the policy current.