Uniform Title Vienna Convention for the Protection of the Ozone Layer (1985 March 22). Protocols, etc. (2016 October 15) Title Amendment to Montreal protocol (''Kigali Amendment'') : message from the President of the United States transmitting amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer (the ''Montreal Protocol''), adopted at Kigali on October 15, 2016, by the Twenty-Eighth Meeting of the Parties to the Montreal Protocol (the ''Kigali Amendment'').