Neutral Nations Supervisory Commission
The Neutral Nations Supervisory Commission (NNSC) was established by the Korean Armistice Agreement signed 27 July 1953, declaring an armistice in the Korean War. It is, with the Military Armistice Commission, part of the mechanism regulating the relations between the Democratic People's Republic of Korea (DPRK, North Korea) and the Republic of Korea (ROK, South Korea).
Source: Wikipedia — Neutral Nations Supervisory Commission (CC BY-SA 4.0)