President, Washington, D.C. Available at http://www.ostp.gov/cs/issues/space_aeronautics.
PD/NSC-25 (Presidential Directive/National Security Council-25). 1977. Scientific or Technological Experiments with Possible Large-Scale Adverse Environmental Effects and Launch of Nuclear Systems into Space (as amended). December 14.
Public Law 83-703. 1954. Atomic Energy Act of 1954, as amended in NUREG-0980. U.S. Nuclear Regulatory Commission, Washington, D.C. Available at http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr0980/ml022200075-vol1.pdf#pagemode=bookmarks&page=14.