COMMISSION REGULATION (EC) No 1638/2004 of 17 September 2004 amending Council Regulation (EC) No 2793/1999 to take account of Commission Regulations (EC) No 2031/2001 and (EC) No 1789/2003 amending Annex I to Council Regulation (EEC) No 2658/87 on the tariff and statistical nomenclature and on the Common Customs Tariff