8.2.4.11} Generic infinite half-space. Code: PLA

      Each PLA is defined by 6 numbers:
      H_x, H_y, H_z (x, y and z components of a vector of arbitrary length
      perpendicular to the plane), V_x, V_y, V_z (coordinates of any point
      lying on the plane).
      The half-space "inside the body" is that from which the vector is pointing
      (i.e., the vector points "outside").
      A PLA definition extends over a single line in default fixed format, and
      over two lines in high-accuracy body fixed format.

      Example in default fixed format:
 *...+....1....+....2....+....3....+....4....+....5....+....6....+....7..
   PLA   74       0.0       1.0       1.0     200.0    -300.0     240.0
 * (all points "below" a plane at 45 degrees in the y-z projection which
 * passes through the point x=200, y=-300, z=240 - note that for such a
 * plane the x value of the point is completely irrelevant - )

      The same example in high-accuracy body fixed format:
 *...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+.
   PLA   74                   0.0                   1.0                   1.0
                            200.0                -300.0                 240.0

     The same example in free format:
 PLA  tiltPla   0.0  1.0  1.0  200.0  -300.0  240.0

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