Regulation (EEC) No 3001/73 of the Commission of 5 November 1973 re-establishing Common Customs Tariff duties on yarn of combed sheep' s or lambs' wool (worsted yarn), not put up for retail sale falling within heading No 53.07 of the Common Customs Tariff, originating in developing countries to which the preferential tariff arrangements set out in Council Regulation (EEC) No 2766/72 of 19 December 1972 apply