Canada

1925 Geneva Protocol
Signature (Paris) 17 June 1925  
Deposit of instruments of ratification (Paris) 6 May 1930 *
Antarctic Treaty
Deposit of instruments of accession (Washington) 4 May 1988  
Anti-Personnel Mine Ban Convention
Signature (UN) 3 December 1997  
Deposit of instruments of ratification (UN) 3 December 1997 *
Biological Weapons Convention
Signature (London) 10 April 1972  
Signature (Washington) 10 April 1972  
Signature (Moscow) 10 April 1972  
Deposit of instruments of ratification (Moscow) 18 September 1972  
Deposit of instruments of ratification (London) 18 September 1972  
Deposit of instruments of ratification (Washington) 18 September 1972  
Chemical Weapons Convention
Signature (UN) 13 January 1993  
Deposit of instruments of ratification (UN) 26 September 1995  
Comprehensive Nuclear-Test-Ban Treaty
Signature (UN) 24 September 1996  
Deposit of instruments of ratification (UN) 18 December 1998  
Convention on Certain Conventional Weapons
Signature (UN) 10 April 1981  
Deposit of instruments of ratification (UN) 24 June 1994 *
Deposit of instruments of acceptance to Amendment to the Convention on Certain Conventional Weapons (UN) 22 July 2002  
Consent to be bound to Protocol III to the Convention on Certain Conventional Weapons (UN) 24 June 1994  
Consent to be bound to Protocol II to the Convention on Certain Conventional Weapons (UN) 24 June 1994  
Consent to be bound to Protocol I to the Convention on Certain Conventional Weapons (UN) 24 June 1994  
Consent to be bound to Protocol IV on Blinding Laser Weapons (UN) 5 January 1998 *
Consent to be bound to Protocol V on Explosive Remnants of War (UN) 19 May 2009  
Consent to be bound to Amended Protocol II on the Use of Mines, Booby-Traps and Other Devices (UN) 5 January 1998 *
Convention on Cluster Munitions
Signature (UN) 3 December 2008  
Deposit of instruments of ratification (UN) 16 March 2015  
Convention on Environmental Modification Techniques (ENMOD)
Signature (UN) 18 May 1977  
Deposit of instruments of ratification (UN) 11 June 1981  
Inter-American Convention on Firearms
Signature (OAS) 14 November 1997  
Inter-American Convention on Transparency
Signature (OAS) 7 June 1999  
Deposit of instruments of ratification (OAS) 18 October 1999  
International Convention for the Suppression of Acts of Nuclear Terrorism
Signature (UN) 14 September 2005  
Deposit of instruments of ratification (UN) 21 November 2013 *
Outer Space Treaty
Signature (Moscow) 27 January 1967  
Signature (London) 27 January 1967  
Signature (Washington) 27 January 1967  
Deposit of instruments of ratification (London) 10 October 1967  
Deposit of instruments of ratification (Moscow) 10 October 1967  
Deposit of instruments of ratification (Washington) 10 October 1967  
Partial Test Ban Treaty
Signature (London) 8 August 1963  
Signature (Moscow) 8 August 1963  
Signature (Washington) 8 August 1963  
Deposit of instruments of ratification (Washington) 28 January 1964  
Deposit of instruments of ratification (London) 28 January 1964  
Deposit of instruments of ratification (Moscow) 28 January 1964  
Sea-Bed Treaty
Signature (Washington) 11 February 1971  
Signature (Moscow) 11 February 1971  
Signature (London) 11 February 1971  
Deposit of instruments of ratification (Washington) 17 May 1972 *
Deposit of instruments of ratification (Moscow) 17 May 1972 *
Deposit of instruments of ratification (London) 17 May 1972 *
Treaty on Conventional Armed Forces in Europe (CFE)
Signature to Agreement on Adaptation of the Treaty on Conventional Armed Forces in Europe (The Hague) 19 November 1999  
Signature (The Hague) 19 November 1990  
Deposit of instruments of ratification (The Hague) 22 November 1991 *
Treaty on Open Skies
Signature (Budapest) 24 March 1992 *
Signature (Ottawa) 24 March 1992 *
Deposit of instruments of ratification (Ottawa) 21 July 1992  
Deposit of instruments of ratification (Budapest) 21 July 1992  
Treaty on the Non-Proliferation of Nuclear Weapons (NPT)
Signature (London) 23 July 1968  
Signature (Washington) 23 July 1968  
Signature (Moscow) 29 July 1968  
Deposit of instruments of ratification (Moscow) 8 January 1969  
Deposit of instruments of ratification (London) 8 January 1969  
Deposit of instruments of ratification (Washington) 8 January 1969