Hi Arofans in USA, there're many reasons the related departments in USA still hold on releasing the ban, but key thing and the only thing can make the change is...$$$. I've contact some big cites approved farms in Singarpor. They said, in order to open the market in usa those farms have to sponsor some funds to the departments. In a fancy way to say, those farms have to invest some more $$ in their farms to upgrade the farms and work with US departments to meet the requirements.