Commission Regulation (EEC) No 1160/80 of 7 May 1980 re-establishing the levying of customs duties on other rubber tyres (including tyre cases with sewn-in inner tubes, for racing bicycles, and tyre flaps), falling within heading No ex 40.11 and originating in Yugoslavia, to which the preferential tariff arrangements set out in Council Regulation (EEC) No 2789/79 apply