How often must Top Secret information be reviewed for declassification?

Top Secret information is required to be reviewed for declassification every five years. This periodic review is mandated to ensure that information originally classified as Top Secret is still deserving of that classification based on its current relevance and sensitivity. The review process helps maintain the integrity of the classification system by ensuring that outdated or no longer sensitive information can be declassified and made available to the public or to lower classification levels. The five-year timeline is a crucial part of the effort to balance national security with transparency and accountability, helping to limit the duration of classification while recognizing that some information may remain sensitive over time.