* National Security Presidential Directive 1 - Organization of the National Security Council (George W. Bush, February 13/01)

* Presidential Decision Directive 63 - Critical Infrastructure Protection (William Jefferson Clinton, May 22/98)

* Presidential Decision Directive 62 - Combatting Terrorism (William Jefferson Clinton, May 22/98)

* Executive Order Blocking Property and Prohibiting Transactions with the Taliban (William Jefferson Clinton, July 4/99)

* Executive Order Prohibiting Transactions with Terrorists Who Threaten to Disrupt the Middle East Peace Process (William Jefferson Clinton, August 30/98) [includes Usama Bin Laden and Al Qaida; PDF]

* Executive Order on Proliferation of Weapons of Mass Destruction (William Jefferson Clinton, July 30/98) [PDF]

* Presidential Decision Directive 39 - U.S. Policy on Counterterrorism (William Jefferson Clinton, June 21/95)

* Executive Order Prohibiting Transactions with Terrorists Who Threaten to Disrupt the Middle East Peace Process (William Jefferson Clinton, January 24/95)

* National Security Decision Directive 207 - The National Program for Combatting Terrorism (Ronald Reagan, January 20/86) [PDF]

* National Security Decision Directive 180 - Civilian Aviation Anti-Terrorism Program (Ronald Reagan, July 20/85) [PDF]

* National Security Decision Directive 138 - Combatting Terrorism (Ronald Reagan, April 3/84) [unclassified extract; PDF]

* National Security Decision Directive 1 - Managing Terrorist Incidents (Ronald Reagan, April 10/82) [PDF]