TREATY ESTABLISHING THE EUROPEAN ECONOMIC COMMUNITY, PART TWO - FOUNDATIONS OF THE COMMUNITY, TITLE I - FREE MOVEMENT OF GOODS, CHAPTER 1: THE CUSTOMS UNION, SECTION 2: SETTING UP OF THE COMMON CUSTOMS TARIFF, ARTICLE 28
++++ ARTICLE 28 ANY AUTONOMOUS ALTERATION OR SUSPENSION OF DUTIES IN THE COMMON CUSTOMS TARIFF SHALL BE DECIDED UNANIMOUSLY BY THE COUNCIL . AFTER THE TRANSITIONAL PERIOD HAS ENDED , HOWEVER , THE COUNCIL MAY , ACTING BY A QUALIFIED MAJORITY ON A PROPOSAL FROM THE COMMISSION , DECIDE ON ALTERATIONS OR SUSPENSIONS WHICH SHALL NOT EXCEED 20 PER CENT OF THE RATE IN THE CASE OF ANY ONE DUTY FOR A MAXIMUM PERIOD OF SIX MONTHS . SUCH ALTERATIONS OR SUSPENSIONS MAY ONLY BE EXTENDED , UNDER THE SAME CONDITIONS , FOR ONE FURTHER PERIOD OF SIX MONTHS .