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Welcome to the online edition of the Handbook for the Montreal Protocol on Substances that Deplete the Ozone Layer. The ninth edition of the Handbook was published in 2012 to coincide with the twenty-fifth anniversary of the Montreal Protocol on 16 September 2012.

The universal ratification of the Vienna Convention and the Montreal Protocol in 2009 was the culmination of more than 25 years of efforts by the international community to ensure that the ozone protection treaties achieved global support and implementation. The Ozone Secretariat would like to extend its warmest congratulations to all the countries in the world for this remarkable achievement.

 The online edition will be updated on a regular basis to include relevant information from 2014 onwards.

  • Section 1 contains the text of the Montreal Protocol and a summary guide to its control measures and will remain unaltered.
  • Section 2 contains the decisions of the Meetings of the Parties and will be updated regularly to incorporate decisions adopted by Meetings of the Parties in future.
  • Section 3, which will also be updated regularly, presents information from the relevant annexes to the decisions. These include destruction procedures for ozone-depleting substances, essential-use exemptions and critical-use exemptions for methyl bromide approved by the Meetings of the Parties, the terms of reference for the assessment panels, the non-compliance procedure of the Protocol, the Multilateral Fund, financial issues and declarations by the parties.
  • Section 4 contains information on the rules of procedure.
  • Section 5 contains information on the evolution of the Montreal Protocol and features the original 1987 Montreal Protocol and the separate adjustments and amendments to the Protocol that were adopted by the Meetings of the Parties in 1990, 1992, 1995, 1997, 1999 and 2007. This section demonstrates how the ozone regime has evolved over time in line with emerging scientific knowledge and technological developments.

Complementary to this edition is the online version of the Handbook for the Vienna Convention for the Protection of the Ozone Layer.

The Secretariat hopes that this online edition will be an important tool for the ozone community and welcomes any suggestions for further improvement of the format of this regularly updated Handbook.


Ozone Secretariat
United Nations Environment Programme

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