If a classified system has been rendered obsolete, how should the original classification authority change its classification?

When a classified system becomes obsolete, the original classification authority must consider the relevance and sensitivity of the information associated with that system. Declassifying the information is the appropriate action because the fundamental rationale for maintaining classification is the need to protect sensitive information that could harm national security if disclosed.

Once a system is deemed obsolete, it typically indicates that the information no longer holds that level of sensitivity or relevance, thus allowing it to be made publicly available. This process ensures that information that no longer poses a threat is opened up to greater transparency, and such a step aligns with policies on classification and declassification which emphasize the need for timely updates to information status as circumstances change.

Keeping it classified, upgrading the classification, or changing to unclassified without proper assessment would not accurately reflect the current state or relevance of the information, and could unnecessarily perpetuate secrecy around information that could be safely shared. Therefore, declassification is the appropriate response for obsolete classified information.