× 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 II/4: Isomers Tipo de documento Decision Número de referencia II/4 Fecha Jun 27, 1990 FuenteUNEP, InforMEA Estado Activo Materia Desechos y sustancias peligrosas, Aire y atmósfera Tratado Protocolo de Montreal relativo a las sustancias que agotan la capa de ozono (Sep 16, 1987) Reunión Página web ozone.unep.org Resumen The Second Meeting of the Parties decided in Dec. II/4 to clarify the definition of “controlled substance” in paragraph 4 of Article 1 of the Protocol so that it is understood to include the isomers of such substances except as specified in the relevant Annex.