Commission Regulation (EEC) No 922/78 of 28 April 1978 re-establishing the levying of customs duties on knives with cutting blades, serrated or not (including pruning knives), other than knives falling within heading No 82.06, falling within heading No ex 82.09 and originating in Hong Kong, to which the preferential tariff arrangements set out in Regulation (EEC) No 2705/77 apply