Data combined with the knowledge of its context and having the potential to serve a Postal Service use.

(a) Sensitive information. Information which has been identified by the USPS as restricted or critical.

(1) Critical information. Information that must be available in order that the Postal Service effectively perform its mission and meet legally assigned responsibilities; and for which special precautions are taken to ensure its accuracy, relevance, timeliness and completeness. This information, if lost, would cause significant financial loss, inconvenience or delay in performance of the USPS mission.

(2) Restricted information. Information that has limitations placed upon both its access within the Postal Service and disclosure outside the Postal Service consistent with the Privacy and Freedom of Information Acts.

(i) Restricted mandatory. Information that has limitations upon its internal access and that may be disclosed only in accordance with an Executive Order, public law, or other Federal statute and their supporting postal regulations.

(ii) Restricted discretionary. Information that has limitations upon its internal access and that may be withheld from external disclosure solely in accordance with postal regulations, consistent with the Freedom of Information Act.

(b) Classified information (National Security). Information about the national defense and foreign relations of the United States that has been determined under Executive Order 12356 to require protection against unauthorized disclosure and has been so designated.