High Quality Content by WIKIPEDIA articles! The Neutral Nations Supervisory Commission (NNSC) was established by the Korean Armistice Agreement signed July 27, 1953, ending the Korean War. It is, with the Military Armistice Commission (UNCMAC), 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).