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Costa Rica

1925 Geneva Protocol
Deposit of instruments of accession (Paris)
17 June 2009
Antarctic Treaty
Deposit of instruments of accession (Washington)
11 August 2022
Anti-Personnel Mine Ban Convention
Signature (UN)
03 December 1997
Deposit of instruments of ratification (UN)
17 March 1999
Arms Trade Treaty
Signature (UN)
03 June 2013
Deposit of instruments of ratification (UN)
25 September 2013
Biological Weapons Convention
Signature (Washington)
10 April 1972
Deposit of instruments of ratification (Washington)
17 December 1973
Chemical Weapons Convention
Signature (UN)
14 January 1993
Deposit of instruments of ratification (UN)
31 May 1996
Comprehensive Nuclear-Test-Ban Treaty
Signature (UN)
24 September 1996
Deposit of instruments of ratification (UN)
25 September 2001
Convention on Certain Conventional Weapons
Deposit of instruments of accession (UN)
17 December 1998
Content to be bound to Protocol I to the Convention on Certain Conventional Weapons (UN)
17 December 1998
Content to be bound to Amended Protocol II on the Use of Mines, Booby-Traps and Other Devices (UN)
17 December 1998
Content to be bound to Protocol IV on Blinding Laser Weapons (UN)
17 December 1998
Content to be bound to Protocol II to the Convention on Certain Conventional Weapons (UN)
17 December 1998
Content to be bound to Protocol III to the Convention on Certain Conventional Weapons (UN)
17 December 1998
Content to be bound to Protocol V on Explosive Remnants of War (UN)
27 April 2009
Deposit of instruments of ratification Amendment to the Convention on Certain Conventional Weapons (UN)
03 June 2009
Convention on Cluster Munitions
Signature (UN)
03 December 2008
Deposit of instruments of ratification (UN)
28 April 2011
Convention on Environmental Modification Techniques (ENMOD)
Deposit of instruments of accession (UN)
07 February 1996
Inter-American Convention on Firearms
Signature (OAS)
14 November 1997
Deposit of instruments of ratification (OAS)
26 April 2001
Inter-American Convention on Transparency
Signature (OAS)
07 June 1999
Deposit of instruments of ratification (OAS)
12 May 2011
International Convention for the Suppression of Acts of Nuclear Terrorism
Signature (UN)
15 September 2005
Deposit of instruments of ratification (UN)
21 February 2013
Partial Test Ban Treaty
Signature (London)
09 August 1963
Signature (Washington)
13 August 1963
Signature (Moscow)
23 August 1963
Deposit of instruments of ratification (Washington)
10 July 1967
Sea-bed Treaty
Signature (Washington)
11 February 1971
Treaty of Tlatelolco
Signature (Mexico City)
14 February 1967
Deposit of instruments of ratification (Mexico City)
25 August 1969
Signature (Mexico City)
10 December 1990
Signature (Mexico City)
03 September 1991
Signature (Mexico City)
26 August 1992
Deposit of instruments of ratification Resolution 267 on the Treaty of Tlatelolco (Mexico City)
20 January 1999
Deposit of instruments of ratification Resolution 268 on the Treaty of Tlatelolco (Mexico City)
20 January 1999
Deposit of instruments of ratification Resolution 290 on the Treaty of Tlatelolco (Mexico City)
20 January 1999
Treaty on the Non-Proliferation of Nuclear Weapons (NPT)
Signature (Washington)
01 July 1968
Deposit of instruments of ratification (Washington)
03 March 1970
Treaty on the Prohibition of Nuclear Weapons
Signature (UN)
20 September 2017
Deposit of instruments of ratification (UN)
05 July 2018
For treaties where the Secretary-General of the United Nations is not the depository, the records in this database rely on information provided to the United Nations by the depository States of those treaties. Some resources listed and/or hyperlinked on this page may be from individuals, organisations and entities other than the United Nations and are provided for information purposes only. The hyperlinking of outside resources is not an endorsement by the United Nations of the views expressed therein nor does the United Nations have control over the content or accuracy of information provided. No editorial comment is implied by the omission of a resource or website.