 U.S.–Russian negotiations led to the 14 September 2013 "Framework for Elimination of Syrian Chemical Weapons," which called for the elimination of Syria's chemical weapon stockpiles by mid-2014.Following the agreement, Syria acceded to the Chemical Weapons Convention and agreed to apply that convention provisionally until its entry into force on 14 October 2013.On 21 September, Syria ostensibly provided an inventory of its chemical weapons to the Organisation for the Prohibition of Chemical Weapons (OPCW), before the deadline set by the framework.