Executive Order 12958 · 1995-04-20

Classified National Security Information

Creates Uniform Rules for Classifying and Declassifying Government Information

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Signed by William J. Clinton
Published 1995-04-20

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 policydeclassificationgovernment transparencynational securityrecords 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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