Commission Regulation (EC) No 920/2004 of 29 April 2004 amending Regulation (EC) No 2550/2001 laying down detailed rules for the application of Council Regulation (EC) No 2529/2001 on the common organisation of the market in sheepmeat and goatmeat as regards premium schemes and amending Regulation (EC) No 2419/2001 by reason of the accession of the Czech Republic, Estonia, Cyprus, Latvia, Lithuania, Hungary, Malta, Poland, Slovenia and Slovakia to the European Union