commiss decis decemb amend decis practic prohibit articl treati common market coal steel ecsc commiss european commun regard treati establish european coal steel commun articl thereof regard high author decis amend decis decemb consult consult committe council articl prohibit discriminatori practic involv common market applic seller dissimilar condit compar transact provis specifi practic prohibit defin high author european coal steel commun decis defin practic prohibit articl articl decis amend decis departur price list constitut discriminatori practic seller show transact question fall categori transact cover price list price condit depart uniformli compar transact experi shown definit constitut prohibit discriminatori practic essenti aspect prohibit cover appear transact consid compar circumst condit consid dissimilar defin compar transact full account protect aim prohibit discrimin prohibit discriminatori practic intend protect purchas disadvantag result applic price condit purpos determin transact compar establish posit purchas compar case compet distribut product produc similar good carri similar function distribut prerequisit compar transact involv similar product commerci featur consid import essenti differ transact conclud moment time consid compar seller meantim alter price condit gener temporari basi dissimilar condit condit make allow differ servic render carri transact condit consid dissimilar seller period payment favour appli gener constitut dissimilar condit advantag allow offset increas price fact circumst show transact compar import determin condit consid similar knowledg undertak undertak requir produc relev evid oj oj rule align lower deliv price undertak common market supplement case accord rule public price exist oblig publish price respect product individu group purchas price condit effect appli competitor basi align adopt decis articl articl substitut articl decis quot articl prohibit practic mean articl treati seller appli common market dissimilar condit articl compar transact articl preced paragraph prejudic applic articl treati decis adopt connect therewith articl transact consid compar mean articl conclud purchas compet produc similar good carri similar function distribut involv similar product addit relev commerci featur essenti differ transact consid compar mean articl date agre last chang occur seller price condit sale articl condit consid dissimilar mean articl treati condit make allow differ servic render carri transact appli seller compar transact condit consid dissimilar increas price seller period payment favour gener appli compar transact articl undertak alleg transact compar articl condit consid dissimilar articl request commiss set fact circumst justifi quot articl substitut articl decis quot articl articl treati seller align quotat competitor price list exist oblig exist limit oblig publish price price condit appli competitor prohibit practic mean articl treati appli condit afford purchas deliv price lower purchas obtain good competitor calcul deliv price account transport cost surcharg tax born purchas rebat drawback allow addit price condit subparagraph articl treati seller align quotat condit quot undertak commun provis paragraph appli correspondingli undertak alleg pursuant articl align quotat lower deliv price competitor common market undertak common market request commiss show condit align obtain compli provis paragraph articl calcul price condit align subparagraph articl align impos effect competit undertak commun quot articl articl decis delet articl renumb articl renumb articl articl decis sentenc paragraph word quot price quot insert quot price list quot word quot articl quot substitut quot articl quot paragraph word quot commiss quot substitut quot high author quot articl amend renumb articl articl decis word quot articl quot substitut quot articl quot articl amend renumb articl decis enter forc januari text decis amend decis publish inform offici journal european commun brussel decemb commiss presid mansholt