National foreword<br>National Annex NA (informative) - Bibliography<br>Foreword<br>Introduction<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Requirements and test methods<br>5 Instructions<br>6 Marking<br>Annex A (informative) - Steering geometry<br>Annex B (informative) - Verification of free fall <br> velocity<br>Bibliography