This document forms part of the critical review process being carried out by the World Health Organization (WHO) regarding the inclusion of the coca leaf in Schedule I of the Single Convention on Narcotic Drugs, 1961. This review, initiated at the request of the Plurinational State of Bolivia
and supported by the Republic of Colombia, offers a unique opportunitywithin the international drug control regime to reassess, in light of new evidence, the criteria applied to substances of natural origin with traditional uses, such as the coca leaf.