6.1.

The aerodynamic device shall be so fitted that during the application of the test forces as specified in paragraph 5.1.2 this aerodynamic device has at the point of application of forces an elastic and/or plastic deformation with a maximum remaining length of 200 mm in longitudinal direction of the vehicle.
This requirement is also deemed to be fulfilled if the aerodynamic device will be folded or retracted under influence of test forces as specified in paragraph 5.1.2 so that the aerodynamic device has in this folded or retracted position a maximum remaining length of 200 mm in longitudinal direction of the vehicle.

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