Commission Regulation (EEC) No 1683/78 of 17 July 1978 re-establishing the levying of the 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 originating in Yugoslavia, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 2705/77 apply