Regulation (EEC) No 1547/75 of the Commission of 18 June 1975 re-establishing the levying of customs duties on tubes and pipes and blanks therefor, of copper; hollow bars of copper, falling within heading No 74.07, originating in Yugoslavia, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 3054/74 of 2 December 1974 apply