Sri Lanka

1925 Geneva Protocol
Deposit of instruments of accession (Paris) 18 December 1953  
Biological Weapons Convention
Signature (Washington) 10 April 1972  
Signature (London) 10 April 1972  
Signature (Moscow) 10 April 1972  
Deposit of instruments of ratification (Moscow) 18 November 1986  
Deposit of instruments of ratification (London) 18 November 1976  
Deposit of instruments of ratification (Washington) 18 November 1986  
Chemical Weapons Convention
Signature (UN) 14 January 1993  
Deposit of instruments of ratification (UN) 19 August 1994  
Comprehensive Nuclear-Test-Ban Treaty
Signature (UN) 24 October 1996  
Convention on Certain Conventional Weapons
Deposit of instruments of accession to Amendment to the Convention on Certain Conventional Weapons (UN) 24 September 2004  
Deposit of instruments of accession (UN) 24 September 2004  
Consent to be bound to Protocol I to the Convention on Certain Conventional Weapons (UN) 24 September 2004  
Consent to be bound to Amended Protocol II on the Use of Mines, Booby-Traps and Other Devices (UN) 24 September 2004  
Consent to be bound to Protocol III to the Convention on Certain Conventional Weapons (UN) 24 September 2004  
Consent to be bound to Protocol IV on Blinding Laser Weapons (UN) 24 September 2004  
Consent to be bound to Protocol II to the Convention on Certain Conventional Weapons (UN) 24 September 2004  
Convention on Environmental Modification Techniques (ENMOD)
Signature (UN) 8 June 1977  
Deposit of instruments of ratification (UN) 25 April 1978  
International Convention for the Suppression of Acts of Nuclear Terrorism
Signature (UN) 14 September 2005  
Deposit of instruments of ratification (UN) 27 September 2007  
Outer Space Treaty
Signature (London) 10 March 1967  
Deposit of instruments of ratification (London) 18 November 1986  
Deposit of instruments of ratification (Washington) 18 November 1986  
Deposit of instruments of ratification (Moscow) 18 November 1986  
Partial Test Ban Treaty
Signature (Moscow) 23 August 1963  
Signature (Washington) 22 August 1963  
Signature (London) 22 August 1963  
Deposit of instruments of ratification (London) 13 February 1964  
Deposit of instruments of ratification (Moscow) 12 February 1964  
Deposit of instruments of ratification (Washington) 5 February 1964  
Treaty on the Non-Proliferation of Nuclear Weapons (NPT)
Signature (Moscow) 1 July 1968  
Signature (London) 1 July 1968  
Signature (Washington) 1 July 1968  
Deposit of instruments of ratification (Moscow) 5 March 1979  
Deposit of instruments of ratification (London) 5 March 1979  
Deposit of instruments of ratification (Washington) 5 March 1979