A convention signed in Paris, and the body of 193 member states that enforces it
Background
The Organisation for the Prohibition of Chemical Weapons (OPCW) is the implementing body for the Chemical Weapons Convention, which entered into force on 29 April 1997.
The OPCW has 193 Member States.
The Convention opened for signature in Paris on 13 January 1993, and 130 nations signed it within the first two days.
Entry into force came 180 days after Hungary became the 65th state to ratify, on 31 October 1996.
The Organisation works through three organs: the Conference of the States Parties, the Executive Council and the Technical Secretariat.
The Executive Council consists of 41 Member States that are elected by the Conference of the States Parties and rotate every two years.
The OPCW records that 100% of the chemical weapons stockpiles declared by possessor States have been verifiably destroyed, and that 98% of the global population live under the protection of the Convention.
The 2013 Nobel Prize for Peace was awarded to the Organisation on 10 December 2013.
In plain words
OPCW Organisation for the Prohibition of Chemical Weapons — The body that implements the Chemical Weapons Convention.
CWC Chemical Weapons Convention — The treaty banning the development, production, stockpiling and use of chemical weapons.