Commission Regulation (EC) No 2121/2004 of 13 December 2004 amending Regulation (EC) No 1727/1999 laying down certain detailed rules for the application of Council Regulation (EEC) No 2158/92 on protection of the Community's forests against fire and Regulation (EC) No 2278/1999 laying down certain detailed rules for the application of Council Regulation (EEC) N) 3528/86 on the protection of the Community’s forests against atmospheric pollution