Which publication mandates the use of NIST SP 800-53?

The use of NIST SP 800-53 is mandated by FIPS 200, which is the Federal Information Processing Standards Publication that establishes the minimum security requirements for federal information and information systems. FIPS 200 focuses on the management of security and privacy for these systems and outlines the baseline controls that need to be implemented. NIST SP 800-53 provides the specific security controls that organizations can use to comply with the requirements set forth in FIPS 200. This relationship is crucial because it ensures that federal agencies adopt a consistent approach to security and risk management, leveraging the comprehensive framework provided in NIST SP 800-53 to address the requirements articulated in FIPS 200.