It seems that Ukraine was awaiting the outcome of domestic litigation concerning plain packaging before moving forward with its WTO complaint. The formal request for the establishment of a panel is ds434-11(pr). (Hat tip to Simon Lester over at the International Economic Law and Policy Blog, who posted the document, as well as some other information about the dispute, here.)
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The latest is perhaps New Zealand proposing a tobacco plain packaging legislation with a consultation process. I have blogged about it here -http://treadthemiddlepath.blogspot.in/2012/08/after-australia-its-new-zealand-tobacco.html
Looks like the trend is spreading…