TREATY ESTABLISHING THE EUROPEAN ECONOMIC COMMUNITY, PART TWO - FOUNDATIONS OF THE COMMUNITY, TITLE I - FREE MOVEMENT OF GOODS, CHAPTER 2: ELIMINATION OF QUANTITATIVE RESTRICTIONS BETWEEN MEMBER STATES, ARTICLE 31
++++ ARTICLE 31 MEMBER STATES SHALL REFRAIN FROM INTRODUCING BETWEEN THEMSELVES ANY NEW QUANTITATIVE RESTRICTIONS OR MEASURES HAVING EQUIVALENT EFFECT . THIS OBLIGATION SHALL , HOWEVER , RELATE ONLY TO THE DEGREE OF LIBERALISATION ATTAINED IN PURSUANCE OF THE DECISIONS OF THE COUNCIL OF THE ORGANISATION FOR EUROPEAN ECONOMIC CO-OPERATION OF 14 JANUARY 1955 . MEMBER STATES SHALL SUPPLY THE COMMISSION , NOT LATER THAN SIX MONTHS AFTER THE ENTRY INTO FORCE OF THIS TREATY , WITH LISTS OF THE PRODUCTS LIBERALISED BY THEM IN PURSUANCE OF THESE DECISIONS . THESE LISTS SHALL BE CONSOLIDATED BETWEEN MEMBER STATES .