Bhutan

1925 Geneva Protocol
Deposit of instruments of accession (Paris) 19 February 1979  
Anti-Personnel Mine Ban Convention
Deposit of instruments of accession (UN) 18 August 2005  
Biological Weapons Convention
Deposit of instruments of accession (Washington) 8 June 1978  
Chemical Weapons Convention
Signature (UN) 24 April 1997  
Deposit of instruments of ratification (UN) 18 August 2005  
Partial Test Ban Treaty
Deposit of instruments of accession (Washington) 8 June 1978  
Treaty on the Non-Proliferation of Nuclear Weapons (NPT)
Deposit of instruments of accession (Washington) 23 May 1985