On March 3, 2005, the WTO Appellate Body (AB) issued a landmark decision[1] interpreting key WTO provisions on agricultural subsidies and upholding a prior panel ruling finding various US cotton subsidies to be WTO illegal. In September 2004 the panel, in a challenge by Brazil, had ruled that various US agricultural programs constituted illegal subsidies under the WTO Agreement on Subsidies and Countervailing Measures, the Agreement on Agriculture and Article XVI of the GATT 1994.[2]