× 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 III/17: Amendment of the Vienna Convention Document type Decision Reference number III/17 Date Jun 19, 1991 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 Third Meeting of the Parties decided in Dec. III/17 with respect to the amendment procedure of the Vienna Convention, to request the Ad Hoc Working Group of Legal Experts on Non-compliance with the Montreal Protocol to consider procedures for expediting the amendment procedure under Article 9 of the Vienna Convention.