Commission Regulation (EC) No 1906/94 of 27 July 1994 amending Regulations (EC) No 121/94 and (EC) No 1606/94 relating to the exemption from the import levy for certain products in the cereals sector laid down in the Agreements between the European Community and, in the first case, the Republic of Poland, the Republic of Hungary, the Czech Republic and the Slovak Republic and, in the second case, the Republic of Bulgaria and Romania