Commission Regulation (EEC) No 2918/90 of 8 October 1990 amending Regulation (EEC) No 4128/87 which lays down conditions for the entry of certain types of tabacco falling within subheadings 2401 10 10 to 2401 10 49 and 2401 20 10 to 2401 20 49 of the combined nomenclature