As a means to catalyze this deal, officials from ICAO member states gathered in Montreal for a three-day high-level meeting to force a consensus on the MBM such that ICAO can inform and consult with its member states and seek agreement on key elements of the scheme. The meeting had a draft proposal for the MBM as an outcome to limit net carbon dioxide emissions from international aviation to 2020 levels. This proposal will further be discussed at ICAO Council’s meeting in June.