Where no such difference exists, any difference subsequently introduced shall not exceed 5 % of the duty which applied on 1 January 1957 to products falling within heading No 27.09.
Má tharlaíonn, roimh dheireadh na tréimhse sé bliana sin, go ndéanfar laghdú ar na dleachtanna custaim nó ar na muirir chomhéifeachta maidir le táirgí faoi cheannteideal Uimh.