معاهدة حظر الأسلحة الكيميائية
On April 18, 1997, South Korea signed the Chemical Weapons Convention and made a secret declaration. It is thought that South Korea is the "state party" referred to in Chemical Weapons Convention materials. There are reports that South Korea is operating a secret facility in Yeongdong County, Chungcheongbuk-do Province for the destruction of chemical agents.