council direct decemb amend direct eec rear mount roll protect structur 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 provis present forc 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 pure theoret paramet calcul addit dynam impact test initi base subject practic experi leav doubt reliabl amend scope direct eec clarifi word indent articl tyre fit front rear axl elimin possibl differ interpret oj adopt direct articl direct eec amend indent articl replac fix adjust minimum track width mm axl fit widest tyre axl fit widest tyre assum adjust maximum track width mm axl capabl adjust outer edg narrowest tyre project outer edg tyre axl widest tyre axl equip wheel tyre size fix adjust track width axl mm annex ii point replac partial test dynam test procedur free tear crack point annex iii dynam test signific tear crack addit impact test crush test defin point annex iii perform immedi test caus tear crack annex iii 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 tear crack similar crush test forc equal fv perform immedi crush test caus tear crack annex vi point insert 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