Notes:  Presidential Directives remain in effect until superseded by subsequent policy or law.  This list focuses on civil policies, not those of a predominantly military nature.   In some cases, especially if policy is classified, only a press release and/or fact sheet, or NO DOCUMENT may be available.

• National Security Presidential Directives (NSPD) -- G.W. Bush (2001-present)

• Presidential Review Directives (PRD); Presidential Decision Directives/National Science and Technology Council (NSTC) -- Clinton (1993-2000)

• Presidential Decision Directives (PDD)/National Space Policy Directives (NSPD) -- George Bush Sr. (1989-1992)

• National Security Study Directives (NSSD)/National Security Decision Directives (NSDD) -- Reagan (1981- 1989)

• Presidential Review Memorandums (PRM); Presidential Directives (PD) -- Carter (1977-1981)

• National Security Study Memorandums (NSSM); National Security Decision Memorandums (NSDM) --Nixon, Ford (1969-1977)

• National Security Action Memorandums (NSAM) -- Kennedy, Johnson (1961-1969)

• National Security Council (NSC) -- Truman, Eisenhower (1947 -- 1961)

National Security Presidential Directives (NSPD) -- G.W. Bush (2001-present)

• There are no NSPD's specifically pertaining to NASA's civil aeronautics or space mission as of last update of this site.

 - National Security Council (NSC)

• NSC-49: National Space Policy (9/19/96)

• PRD NSTC-1:  Federal Laboratories (5/5/94)
• PRD NSTC-2:  Space Policy (5/15/95)
• PRD NSTC-3:  Global Positioning System Policy Review (5/18/95) -- Press Release
• PRD NSTC-4:  Review of the University-Government Partnership (9/26/96)-- Fact Sheet;Also Report 1/01
• PRD NSTC-6:  Renewing the Federal Government-University Research Partnership for the 21st

Century (4/27/99) -- Press Release

• PDD NSTC-1:  Establishment of Presidential Review and Decision Series/NSTC  (1/25/94)
• PDD NSTC-2:  Convergence of U.S. Polar-Orbiting Operational Environmental Satellite Systems  (5/5/94)
• PDD NSTC-3:  Landsat Remote Sensing Strategy
• Current Version as Amended 10/6/00 -- Fact Sheet
• Original Version, 5/5/94
• PDD NSTC-4:  National Space Transportation Policy  (8/5/94)
• PDD NSTC-5:  Guidelines for Federal Laboratory Reform  (9/24/95) -- Fact Sheet
• PDD NSTC-6:  U.S. Global Positioning System Policy  (3/28/96) -- Fact Sheet
• PDD NSTC-8:  National Space Policy (9/16/96) -- Fact Sheet

 - National Security Study Directives (NSSD)

• NSSD 13-82: National Space Strategy (12/15/82)
• NSSD 5-83:  Space Station (4/11/83)
• NSSD 3-85:  Shuttle Pricing (1/24/85)
• NSSD 6-85:  National Space Transportation and Support Study (5/14/85)

• NSDD 8:  Space Transportation System (11/13/81)
• NSDD 42:  National Space Policy (7/4/82)
• NSDD 50:  Space Assistance and Cooperation Policy (8/6/82)
• NSDD 80:  Shuttle Orbiter Production Capability (2/3/83)
• NSDD 5-83:  Space Station (4/11/83)
• NSDD 94:  Commercialization of Expendable Launch Vehicles (5/16/83)
• NSDD 144:  National Space Strategy (8/16/84)
• NSDD 164:  National Security Launch Strategy (2/25/85)
• NSDD 181:  Shuttle Pricing for Foreign and Commercial Users
• NSDD 195:  The U.S. Position:  Nuclear and Space Talks (10/30/85)
• NSDD 254:  U.S. Space Launch Strategy (12/27/86)
• NSDD 293:  National Space Policy (1/5/88).  Fact sheet (2/11/88)
• NSDD 318:  Nuclear and Space Talks -- Additional Elements of the U.S. Position (10/24/88)

• PRM/ NSC 23:  A Coherent U.S. Space Policy (3/28/77)
• PD/NSC 37: National Space Policy  (5/11/78)
• PD/NSC 42: Civil and Further National Space Policy (10/10/78)

• NSDM 70:  International Space Cooperation: US-USSR Activities
• NSDM 72:  Exchange of Technical Data Between the US and the International Space Community

• NSAM 32:  US-USSR Commercial Air Transport Agreement
• NSAM 50:  Official Announcement of Launching Into Space Systems Involving Nuclear Power
• NSAM 129:  US-USSR Cooperation in the Exploration of Space
• NSAM 144:  Assignment of Highest National Priority to the APOLLO Manned Lunar Landing Program
• NSAM 156:  Re: Negotiations on Disarmament and Peaceful Uses of Outer Space
• NSAM 172:  Bilateral Talks Concerning US-USSR Cooperation in Outer Space
• NSAM 183:  Space Program for the United States
• NSAM 192:  Re: "A Separate Arms Control Measure for Outer Space"
• NSAM 207:  Assignment of the Highest National Priority to Project CENTAUR
• NSAM 237:  Project MERCURY Manned Space Flight (MA-9)
• NSAM 271:  Cooperation with the USSR on Outer Space Matters

• NSC 5520:  Missile and Space Programs
• NSC 5814/1:  Missile and Space Programs
• NSC 6108:  Missile and Space Programs