× 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 X/1: Ratification of the Vienna Convention, Montreal Protocol, London, Copenhagen and Montreal Amendments Document type Decision Reference number X/1 Date Nov 23, 1998 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 Tenth Meeting of the Parties decided in Dec. X/1: To note with satisfaction the large number of countries that have ratified the Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances that Deplete the Ozone Layer; To note that many Parties have yet to ratify the London, Copenhagen and Montreal Amendments to the Montreal Protocol; To urge all States that have not yet done so to ratify, approve or accede to the Vienna Convention and the Montreal Protocol and its Amendments, taking into account that universal participation is necessary to ensure the protection of the ozone layer.