How often must classified information be reviewed for declassification?

The requirement to review classified information for declassification is typically established under various guidelines and policies, including Executive Order 13526, which governs the classification and declassification of national security information. According to these guidelines, classified information must be reviewed for declassification at least every 10 years. This timeframe allows for the reassessment of the necessity of classification, ensuring that information that no longer requires protection can be released to the public in a timely manner.

This 10-year review requirement is in place to balance the need for national security with the principle of transparency and accountability in government. By reviewing classified documents periodically, agencies can systematically reduce the backlog of classified information and reduce unnecessary secrecy, fostering public trust and ensuring that the public has access to information that is no longer sensitive.

In contrast, reviewing classified information every 5 years would not sufficiently account for the possibility that some information may still warrant protection for longer periods, while reviewing it every 15 years is too infrequent and could lead to outdated classification. Annual reviews would overwhelm agencies and detract from resources that could be utilized elsewhere. Thus, the 10-year review period strikes a responsible balance in the management of classified information.