The Treaty on Conventional Armed Forces in Europe, which establishes comprehensive limits on key categories of military equipment, was ratified by the Armenian parliament in July 1992. In March 1993, Armenia signed the multilateral Chemical Weapons Convention, which calls for the eventual elimination of chemical weapons. Armenia acceded to the Nuclear Non-Proliferation Treaty (NPT) as a non-nuclear weapons state in July 1993. Armenia is a member of the Collective Security Treaty Organisation (CSTO). Armenia also has an Individual Partnership Action Plan with NATO and it participates in NATO's Partnership for Peace (PiP) program and the Euro-Atlantic Partnership Council (EAPC).