Skip to main content

The Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances that Deplete the Ozone Layer logo was developed to provide a distinct brand for the two treaties across various communication assets and applications. The visual identity guideline is designed to provide a comprehensive overview of applications and correct use of the logo.

cover image

The Protocol, along with the Vienna Convention, achieved universal participation on 16 September 2009 – the first treaties of any kind in the history of the United Nations system to achieve that aspiration.

This edition has been updated to include all relevant information from 1989 to date.


Baselines:  Past practices and current challenges

The purpose of this briefing note is to provide background information about the following areas:

  • The baselines agreed under the Montreal Protocol to date for CFCs, carbon tetrachloride, HCFCs and methyl bromide, as examples, in both non-Article 5 and Article 5 parties;
  • The time lag between the year in which a decision was taken and the years of the baseline and initial control measures;
  • The baselines that have been put forward in the HFC amendment proposals.
Briefing notes
Funding and flexibility in implementation: Issues raised during informal consultations among parties

This briefing note focuses on the key issues related to funding and flexibility in implementation that were discussed by the contact group at the 37th OEWG in Geneva.3 It presents background information related to a number of outstanding issues to be discussed further when the 37th Meeting of the Open-Ended Working Group resumes its work. The issues discussed in this note have been identified in informal discussions during the 37th Meeting of the Open-ended Working Group (OEWG) and were presented by the co-chairs of the contact group. This section is divided into those issues relevant to incremental costs in the consumption, production, and servicing sectors, and also addresses a number of cross-cutting issues.

2015 meeting, parties decided “Dubai pathway on HFCs” to “work within the Montreal Protocol to an HFC amendment in 2016 by resolving challenges by generating solutions in the contact group on the feasibility and ways of managing HFCs”. This briefing note is to provide background info about agreed baselines under Montreal Protocol, time lag between decision and the years of baseline and initial controls, and baselines put forward in the HFC amendment proposals. The information in this note is intended only as background material for the parties; it is not intended to be exhaustive and does not provide policy recommendations.