interior zone 1:
in front of the torso reference line in relation to the seating position of the driver,
above the R-point of the seating position of the driver,
interior zone 2:
in front of the torso reference line in relation to the seating position of the driver,
below the R-point of the seating position of the driver, and
interior zone 3:
behind the torso reference line in relation to the seating position of the driver,
in front of the torso reference line in relation to the seating position of the rearmost passenger,
above the R-point of the lowest seating position other than that of the driver.
plane X-X’ remains parallel to the longitudinal median plane of the vehicle, and
axis X can be rotated above and below the horizontal through angles of up to 30°.