Dov and Cun - are members of the European Union (EU). Dov manufactures a snack called Awnoug which is exported to States including Cun. With a view to enhancing consumer awareness, Cun passes legislation which requires that all products marketed as a snack within its territory must specify the product's gluten content. Dov wishes to challenge this measure. What arguments could it make? Before which forum? What possible counter arguments are available to Cun?