Commission Regulation (EEC) No 984/80 of 22 April 1980 re-establishing the levying of customs duties on other inner tubes and tyre cases (including tyre cases with sewn-in inner tubes and tyre flaps), falling within heading No ex 40.11 and originating in South Korea, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 2789/79 apply