Action 3021

Membership Information for: Montreal Protocol On Substances That Deplete The Ozone Layer

Signed: 1987-09-16; Entered into force: 1989-01-01; Terminated:
Source for membership data: https://treaties.un.org/pages/ViewDetails.aspx?src=TREATY&mtdsg_no=XXVII-2-a&cha…
Date of last download from source: 2022-03-14
This is the IEADB's most current data on signature, ratification, entry into force, and other membership actions. The IEADB updates this data approximately once a year and tries to ensure it is current and accurate. For the most current data, visit the Ozone Secretariat website. For inaccuracies, please notify the Project Director.
Agreement Action Country Year Month Day Edit link
Entry Into Force Senegal 1993 8 4
Entry Into Force Serbia 2001 6 12
Entry Into Force Seychelles 1993 4 6
Entry Into Force Sierra Leone 2001 11 27
Entry Into Force Singapore 1989 1 5
Entry Into Force Slovakia 1993 8 28
Entry Into Force Slovenia 1992 10 6
Entry Into Force Solomon Islands 1993 9 17
Entry Into Force Somalia 2001 10 30
Entry Into Force South Africa 1990 4 15
Entry Into Force South Sudan 2012 4 11
Entry Into Force Spain 1989 1 1
Entry Into Force Sri Lanka 1990 3 15
Entry Into Force Sudan 1993 4 29
Entry Into Force Suriname 1998 1 14
Entry Into Force Sweden 1989 1 1
Entry Into Force Switzerland 1989 1 1
Entry Into Force Syria 1990 3 12
Entry Into Force Tajikistan 1998 4 7
Entry Into Force Tanzania 1993 7 15
Entry Into Force Thailand 1989 10 7
Entry Into Force Timor-Leste 2009 12 15
Entry Into Force Togo 1991 5 25
Entry Into Force Tonga 1998 10 29
Entry Into Force Trinidad and Tobago 1989 11 28
Entry Into Force Tunisia 1989 12 25
Entry Into Force Türkiye 1991 12 20
Entry Into Force Turkmenistan 1994 2 18
Entry Into Force Tuvalu 1993 10 15
Entry Into Force Uganda 1989 1 1
Entry Into Force Ukraine (Soviet period) 1989 1 1
Entry Into Force United Arab Emirates 1990 3 22
Entry Into Force United Kingdom 1989 1 1
Entry Into Force United States 1989 1 1
Entry Into Force Uruguay 1991 4 8
Entry Into Force Uzbekistan 1993 8 18
Entry Into Force Vanuatu 1995 2 19
Entry Into Force Venezuela 1989 5 6
Entry Into Force Viet Nam 1994 4 26
Entry Into Force Yemen 1996 5 21
Entry Into Force Zambia 1990 4 24
Entry Into Force Zimbabwe 1993 2 3

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Membership status is coded as follows:

  • Countries listed are those that have signed and/or ratified the IEA in question.
  • Legend:
    • 0 (pink): Signer: country signed but did not ratify IEA. Status is 0 for all countries until IEA enters into force.
    • 1 (yellow): Ratifier: country signed and ratified IEA but IEA had not entered into force. Status is 1 for countries that have ratified until IEA enters into force.
    • 2 (green):Member: country signed and ratified IEA and IEA has entered into force for that country.
    • Ratifier row is count of states that have ratified.
    • Membership row is count (not sum) of members.
  • If membership data source lacks entry into force date, membership is inferred from year of ratification, if that year occurs after entry into force year of IEA.
  • Status can return to 0 if an IEA is terminated or if a country withdraws. In rare cases, countries later re-join IEAs, with their status returning to 2.
  • Action tab: membership by Action, Country, Year, Month, Day.
  • Wide tab: Annual status data (countries as rows, years as columns).
  • Long tab: Annual status data in Stata format (Country, Year, Membership Status).