(Following is a draft version, which is subject to be updated or revised. Your comments and feedbacks are welcome!)
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In the Final Document of the 2010 NPT RevCon, the NWS were called upon to report on actions taken towards “accelerat[ion of] concrete progress on the steps leading to nuclear disarmament” to the 2014 PrepCom (Action 5). However, it is pointed out that “[t]he prospect of achieving concrete progress against the Action Plan before the 2014 reporting deadline is low.” On the other hand, at the fourth P5 Conference held in April 2013, the five NWS “reaffirmed their objective to submit a P5 glossary [of definitions] of key nuclear terms to the 2015 NPT Review Conference.” China reported at the 2013 NPT PrepCom that their “experts have reached a preliminary agreement on a list of key nuclear terms.” China also indicated the prospect that the “[w]ork on the compilation and translation of the Glossary is scheduled to be concluded in [the] next 2 years, [and its] outcome [would] be reported to the 2015 NPT Review Conference.”
In 2013, no nuclear-weapon/armed states took additional, significant transparency measures regarding nuclear forces, fissile material for nuclear weapons, or nuclear strategy/doctrine. The NPDI submitted a working paper “Transparency of Nuclear Weapons” to the 2012 PrepCom, which included a draft form for standard nuclear disarmament reporting on nuclear warheads, delivery vehicles, fissile material for nuclear weapons, and nuclear strategy/policies. Using the draft form, the following table summarizes the degree of transparency taken by the nuclear-weapon/armed states.
(TABLE (to be added))
(Drafted by Hirofumi Tosaki, CPDNP)
 Andrea Berger and Malcolm Chalmers, “Great Expectations: The P5 Process and the Non-Proliferation Treaty,” Whitehall Report, No. 3-13 (August 2013), p. 33.
 “Fourth P5 Conference: On the Way to the 2015 NPT Review Conference,” Washington, DC, April 19, 2013, http://www.state.gov/r/pa/prs/ps/2013/04/207768.htm.
 “Statement by Mr. Pang Sen, Head of the Chinese Delegation, Director-General of the Department of Arms Control and Disarmament of MFA of the People's Republic of China at the General Debate in the Second Session of the Preparatory Committee for the 2015 NPT Review Conference,” Geneva, April 22, 2013.
 NPT/CONF.2015/PC.I/WP.12, 20 April 2012.