Article 4 of the WTO waiver--or the WTO decision, as we've being using those terms interchangeably--talks about the obligations that importing countries shall take. I can quote it for you, but basically they are measures they must take to prevent trade diversion.
If they import drugs under the WTO system, they have to make sure that the drugs stay within their jurisdiction and aren't re-exported. They must also prevent re-exportation of the products that have actually been imported into the countries. That's basically what it says.