× Information on this section of ECOLEX comes from the InforMEA Portal which compiled information from MEA Secretariats with the support of the European Union. The accuracy of the information displayed is the responsibility of the originating data source. In case of discrepancy the information as displayed on the respective MEA website prevails. Decision IV/1: Amendment adopted by the Second Meeting of the Parties (London Amendment) Document type Decision Reference number IV/1 Date Nov 23, 1992 SourceUNEP, InforMEA Status Active Subject Waste & hazardous substances, Air & atmosphere Treaty Montreal Protocol on Substances that Deplete the Ozone Layer (Sep 16, 1987) Meeting Website ozone.unep.org Abstract The Fourth Meeting of the Parties decided in Dec. IV/1 to invite the attention of the Parties to the Montreal Protocol to the entry into force, on 10 August 1992, of the Amendment to the Protocol adopted by the Second Meeting of the Parties and to urge all Parties that have not yet ratified the said Amendment to do so.