Copenhagen Amendment to the Montreal Protocol on ozone depleting substances: Commission proposal A Commission proposal for a Council Decision concerns the conclusion of the Amendment to the Montreal Protocol on substances that deplete the ozone layer as adopted in November 1992 in Copenhagen by the Parties to the Protocol (COM(93) 102). The most recent scientific evidenc... A Commission proposal for a Council Decision concerns the conclusion of the Amendment to the Montreal Protocol on substances that deplete the ozone layer as adopted in November 1992 in Copenhagen by the Parties to the Protocol (COM(93) 102). The most recent scientific evidence indicates that for the adequate protection of the ozone layer a higher degree of control of chlorofluorocarbons, halons, carbon tetrachloride and 1,1,1-trichloroethane is required than that provided by the Montreal Protocol as amended in 1990 (London Amendment). Additional controls should also be placed on methyl bromide, hydrobromofluorocarbons and hydrochlorofluorocarbons (the first Amendment to the Protocol was adopted on 29 June 1990 and subsequently approved on behalf of the Community). To this end, a second Amendment and Adjustments to the Protocol have been adopted in Copenhagen in November 1992. Only the Amendment need be approved. The Commission considers it necessary for the Community to bring into force the second Amendment, which is based on the principle of preventive action to avoid further damage to the ozone layer and on the scientific and technical data available at the time of its adoption, in order to protect, promote and improve the environment. Further, some of the provisions of the second Amendment can be carried out only if the Community and all its Member States approve it. Hence, It is proposed that Member States deposit instruments of ratification or approval before 30 November 1993. The text of the second Amendment including a revised annex of controled substances is appended to the proposal.