Executive Order 12958, as amended (PDF Format) prescribes a uniform system for classifying, safeguarding, and declassifying national security information, including information relating to defense against transnational terrorism.

Pursuant to Section 5.1(a) and (b) of Executive Order 12958, as amended, ISOO Directive No. 1 (PDF Format) sets forth guidance to agencies on original and derivative classification, downgrading, declassification, and safeguarding of classified national security information.

ISOO Directive No. 1, Appendix A (PDF Format) describes the procedures to be followed by individuals or organizations who wish to bring matters before the Interagency Security Classification Appeals Panel (ISCAP), and the procedures that the ISCAP will follow to resolve these matters.

View an up-to-date listing of agency heads and officials who have been designated by the President in the Federal Register as having the authority to classify information. More information about original classification can be found in Executive Order 12958, as amended.

Executive Order 12829, as amended (PDF Format) establishes a National Industrial Security Program to safeguard Federal Government classified information that is released to contractors, licensees, and grantees of the United States Government.

National Industrial Security Program (NISP) implementing order safeguards Federal Government classified information that is released to contractors, licensees, and grantees of the United States Government.