council direct decemb amend direct eec roll protect structur mount front driver seat narrow track wheel agricultur forestri tractor eec council european commun regard treati establish european econom commun articl thereof regard propos commiss cooper european parliament regard opinion econom social committe adopt measur aim progress establish intern market period expir decemb intern market compris area intern frontier free movement good person servic capit ensur articl direct eec lai direct supplement provis introduc addit impact test dynam test procedur provis made addit test case static test procedur dynam test procedur provid addit test accur reflect situat event tractor roll order test procedur render equival present imbal elimin respect reliabl paramet calcul result practic experi carri rear mount structur transpos type structur mount front oj adopt direct articl direct eec amend annex iv point replac addit test crack tear consid neglig impact test similar test height fall hm hm perform immedi impact test caus tear crack ratio perman deform elast deform dp de measur point impact addit perman deform due impact exce perman deform due impact order carri addit test measur elast deform impact test crush test signific crack tear similar crush test forc equal fv perform immedi crush test caus tear crack annex vi point ad indic result addit dynam test articl member state bring forc law regul administr provis compli direct month januari forthwith inform commiss thereof articl direct address member state brussel decemb council presid cresson oj oj oj oj