Commission Regulation (EEC) No 557/78 of 16 March 1978 amending Regulation (EEC) No 464/78 re-establishing the levying of customs duties on plaits and similar products of plaiting materials, for all uses, etc., falling within tariff heading No ex 46.02, originating in South Korea to which the preferential tariff arrangements set out in Council Regulation (EEC) No 2705/77 apply