Commission Regulation (EEC) No 662/78 of 3 April 1978 re-establishing the levying of customs duties on inner tubes and tyre cases, of the kind used on bicycles, cycles with an auxiliary motor, motor-cycles or motor-scooters, falling within heading No ex 40.11 and originating in South Korea, to which the preferential tariff arrangements set out in Regulation (EEC) No 2705/77 apply