Changes to Council Regulation (EC) No 1023/2003 of 13 June 2003 extending the definitive anti-dumping duty imposed by Regulation (EC) No 1784/2000 on imports of certain malleable cast iron tube or pipe fittings originating in Brazil and on imports of certain malleable cast iron tube or pipe fittings consigned from Argentina, whether declared as originating in Argentina or not, and terminating the investigation in respect of imports from one Argentinian exporter: Council Regulation (EC) No 438/2004 of 8 March 2004 extending the suspension of the extended anti-dumping duty imposed by Regulation (EC) No 1023/2003 on imports of certain malleable cast-iron tube or pipe fittings consigned from Argentina, whether declared as originating in Argentina or not