Division (414) The measurement of errors on installation and during use shall be carried out under the following conditions, which are to be regarded as constituting standard test conditions:

vehicle unladen, in normal running order,

tyre pressures in accordance with the manufacturer's instructions,

tyre wear, within the limits allowed by national law,

vehicle movement:

the vehicle shall advance under its own engine power in a straight line on level ground and at a speed of 50 ± 5 km/h. The measuring distance shall be at least 1 000 m.

provided that it is of comparable accuracy, alternative methods, such as a suitable test bench, may also be used for the test.