If you're asking whether it is working, then I think the answer is fairly straightforward. The purpose of the legislation is to produce cheaper generic versions of patented drugs for export to developing countries. No drugs have been exported, so I think that's your answer. If your question is whether it works, I think it can. I think operationally it's sound. But the fact remains that to date no drugs have been exported.
On April 16th, 2007. See this statement in context.