The Single Convention gives the UN Economic and Social Council's Commission on Narcotic Drugs (CND) power to add or delete drugs from the Schedules, in accordance with the World Health Organization's findings and recommendations. Any Party to the treaty may request an amendment to the Schedules, or request a review of the commission's decision. The Economic and Social Council is the only body that has power to confirm, alter, or reverse the CND's scheduling decisions. The United Nations General Assembly can approve or modify any CND decision, except for scheduling decisions.