(19)
Technologies of unknown origin.
--The term ``technologies of unknown origin'' means any materials or meta-materials, ejecta, crash debris, mechanisms, machinery, equipment, assemblies or sub-assemblies, engineering models or processes, damaged or intact aerospace vehicles, and damaged or intact ocean-surface and undersea craft associated with unidentified anomalous phenomena or incorporating science and technology that lacks prosaic attribution or known means of human manufacture.
(20)
Temporarily non-attributed objects.
-- (A) In general.
--The term ``temporarily non-attributed objects'' means the class of objects that temporarily resist prosaic attribution by the initial observer as a result of environmental or system limitations associated with the observation process that nevertheless ultimately have an accepted human origin or known physical cause. Although some unidentified anomalous phenomena may at first be interpreted as temporarily non-attributed objects, they are not temporarily non-attributed objects, and the two categories are mutually exclusive.
(B) Inclusion.
--The term ``temporarily non-attributed objects'' includes
(i) natural celestial, meteorological, and undersea weather phenomena;
(ii) mundane human-made airborne objects, clutter, and marine debris;
(iii) Federal, State, and local government, commercial industry, academic, and private sector aerospace platforms;
(iv) Federal, State, and local government, commercial industry, academic, and private sector ocean-surface and undersea vehicles; and
(v) known foreign systems.
(22)
Unidentified anomalous phenomena.
-- (A) In general.
--The term ``unidentified anomalous phenomena'' means any object operating or judged capable of operating in outer-space, the atmosphere, ocean surfaces, or undersea lacking prosaic attribution due to performance characteristics and properties not previously known to be achievable based upon commonly accepted physical principles. Unidentified anomalous phenomena are differentiated from both attributed and temporarily non-attributed objects by one or more of the following observables:
(i) Instantaneous acceleration absent apparent inertia.
(ii) Hypersonic velocity absent a thermal signature and sonic shockwave.
(iii) Transmedium (such as space-to-ground and air-to- undersea) travel.
(iv) Positive lift contrary to known aerodynamic principles.
(v) Multispectral signature control.
(vi) Physical or invasive biological effects to close observers and the environment.
(B) Inclusions.
--The term ``unidentified anomalous phenomena'' includes what were previously described as
(i) flying discs;
(ii) flying saucers;
(iii) unidentified aerial phenomena;
(iv) unidentified flying objects (UFOs); and
(v) unidentified submerged objects (USOs).
