[19] United States - Standards for Reformulated and Conventional Gasoline,WT/DS2/R, Report of the Panel ,29 January 1996.
[20] United States - Standards for Reformulated and Conventional Gasoline,WT/DS2/AB/R, Report of the Appellate Body,20 May 1996.
[21] United States - Import Prohibition of Certain Shrimp and Shrimp Products ,Report of The Appellate Body, WT/DS58/AB/RW ,22 October 2001 ,para.6.1.