FN: a participant in an event.Kazakhstan is a party to START-I , the Nuclear Non-Proliferation Treaty ( NPT ) , and the Comprehensive Test Ban Treaty ( CTBT ) .Pyongyang was also required to `` consistently take steps to implement the North - South Joint Declaration on the Denuclearization of the Korean Peninsula , '' and remain a party to the NPT .China is a party to most of the major international agreements regulating biological weapons , including the Geneva Protocol and the Biological and Toxin Weapons Convention ( BWC or BTWC ) .