“On 22 January 2001, Brazil requested consultations with Canada pursuant to Article XXIII:1 of the General Agreement on Tariffs and Trade 1994 ("GATT 1994"), Article 4 of the Understanding on Rules and Procedures Governing the Settlement of Disputes ("DSU"), and Article 4 of the Agreement on Subsidies and Countervailing Measures ("SCM Agreement") regarding certain alleged subsidies granted by the Government of Canada and the Province of Quebec that support the export of regional aircraft from Canada.”