Commission Regulation (EC) No 651/98 of 23 March 1998 amending Council Regulations (EC) No 1890/97 and (EC) No 1891/97 imposing definitive anti-dumping and countervailing duties on imports of farmed Atlantic salmon originating in Norway, amending Commission Regulation (EC) No 2529/97 imposing provisional anti- dumping and countervailing duties on imports of farmed Atlantic salmon originating in Norway with regard to certain exporters and amending Commission Decision 97/634/EC accepting undertakings offered in connection with the anti-dumping and anti-subsidies proceedings concerning imports of farmed Atlantic salmon originating in Norway