Classified National Security Information
This executive order establishes a comprehensive uniform system for classifying, safeguarding, and declassifying national security information across the federal government. It creates automatic declassification timelines (generally 10 years for original classification, 25 years for historically valuable records), establishes new oversight bodies, and mandates training and procedural requirements for officials with classification authority. The order significantly expands transparency by requiring declassification instructions on all classified documents and creating mechanisms for public challenge of classification decisions.