Yemen

1925 Geneva Protocol
Deposit of instruments of accession (Paris) 9 December 1986 *
Anti-Personnel Mine Ban Convention
Signature (UN) 4 December 1997  
Deposit of instruments of ratification (UN) 1 September 1998  
Biological Weapons Convention
Signature (Moscow) 26 April 1972  
Signature (London) 10 May 1972  
Deposit of instruments of ratification (Moscow) 1 June 1979  
Chemical Weapons Convention
Signature (UN) 8 February 1993  
Deposit of instruments of ratification (UN) 2 October 2000  
Comprehensive Nuclear-Test-Ban Treaty
Signature (UN) 30 September 1996  
Convention on Environmental Modification Techniques (ENMOD)
Signature (UN) 18 May 1977  
Deposit of instruments of ratification (UN) 20 July 1977 *
International Convention for the Suppression of Acts of Nuclear Terrorism
Deposit of instruments of accession (UN) 13 October 2014 *
Outer Space Treaty
Deposit of instruments of accession (Moscow) 1 June 1979  
Partial Test Ban Treaty
Deposit of instruments of accession (Moscow) 1 June 1979 *
Sea-Bed Treaty
Signature (Moscow) 23 February 1971  
Deposit of instruments of ratification (Moscow) 1 June 1979  
Treaty on the Non-Proliferation of Nuclear Weapons (NPT)
Signature (Moscow) 23 September 1968  
Deposit of instruments of ratification (London) 14 May 1986  
Deposit of instruments of ratification (Moscow) 26 January 1989