If an international treaty, ratified by the U.S., mandates that a drug be controlled, the Attorney General is required to "issue an order controlling such drug under the schedule he deems most appropriate to carry out such obligations" without regard to scientific or medical findings. Under the Single Convention on Narcotic Drugs, cannabis and cannabis resin are classified, at the insistence of the United States, under Schedule IV, that treaty's most strictly controlled category of drugs. However, "Article 4(c)" of the Single Convention specifically excludes medicinal drug use from prohibition, requiring only that Parties "limit exclusively to medical and scientific purposes the production, manufacture, export, import, distribution of, trade in, use and possession of drugs". On the other hand, "Article 2(5)(b)" states that for Schedule IV drugs: