The World Health Organization Framework Convention on Tobacco Control (WHO FCTC) is the first international treaty negotiated under the auspices of WHO. It was adopted by the World Health Assembly on 21 May 2003 and entered into force on 27 February 2005. It has since become one of the most rapidly and widely embraced treaties in the United Nations history. Parties to the Convention have since developed a second international treaty, the Protocol to Eliminate Illicit Trade in Tobacco Products. The Protocol entered into force on 25 September 2018.