On 15 October 2016, in Kigali, the parties to the Mon- treal Protocol on Substances that Deplete the Ozone Layer (the Montreal Protocol) reached agreement at their 28th Meeting to phase down consumption and production of hydrofluorocarbons (HFCs). They adopted an amendment (the Kigali Amendment) in Decision XXVIII/1. This briefing note has been prepared by the Secretar- iat of the Montreal Protocol to help Parties to the Pro- tocol prepare for ratification, acceptance, or approval of the Kigali Amendment.
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.