× 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 IX/4: Tenth meeting of the Conference of the Parties to the Vienna Convention Document type Decision Reference number IX/4 Date Nov 25, 2011 SourceUNEP, InforMEA Status Active Subject Waste & hazardous substances, Air & atmosphere Treaty Vienna Convention for the Protection of the Ozone Layer (Mar 22, 1985) Meeting Ninth meeting of the Conference of the Parties Website ozone.unep.org Abstract To convene the tenth meeting of the Conference of the Parties to the Vienna Convention back to back with the Twenty-Sixth Meeting of the Parties to the Montreal Protocol.