Classified National Security Information

1995-04-20Executive Order 12958
Signed by: William J. Clinton
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Headline: Creates Uniform Rules for Classifying and Declassifying Government Information

What it does: Federal agencies must follow a uniform system to classify, safeguard, and declassify national security information and implement required procedures and oversight.

Real World Impact:
  • Requires agencies to mark classified documents with level, origin, and declassification instructions.
  • Sets default declassification at 10 years and automatic declassification for older records after 25 years.
  • Creates oversight office and appeals panel to review classification decisions.
Topics: classification policy, declassification, government transparency, national security, records management

Summary

This order establishes a single government-wide system for classifying, protecting, and declassifying national security information. It defines classification levels (Top Secret, Secret, Confidential), marking requirements, time limits for declassification, and limits on what may be classified.

It directs executive branch agencies to adopt procedures for original and derivative classification, automatic and mandatory declassification review, records management, and safeguarding of classified materials. The order also creates an Information Security Oversight Office, an interagency appeals panel, and sanctions for improper handling, affecting agency officials, employees, contractors, researchers, and the public.

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