Home2023 Treaties and Agreements ...Multilateral (23-129) – Amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer of September 16, 1987 hide Multilateral (23-129) – Amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer of September 16, 1987 TIAS Office of Treaty Affairs October 15, 2016 Pollution: Depletion of the Ozone Layer Done at Kigali October 15, 2016 Download Agreement [349 KB] Tags Emissions and Pollution International Law, Treaties, and Agreements