ial region, the result of this routine
   is invalid.

   Examples:

      Valid inputs
      ------------
      Tetrahedron
      Box
      Tiled ellipsoid
      Two disjoint boxes

      Invalid inputs
      --------------
      Single plate
      Tiled ellipsoid with one plate removed
      Two boxes with intersection having positive volume

</pre><h4><a name="Required Reading">Required Reading</a></h4><pre>

   For important details concerning this module's function, please refer to
   the CSPICE routin