The Montreal Protocol regulates the production and use of CFCs, halons, and carbon tetrachloride, which are all greenhouse gases. It obliges states to totally phase out these substances in accordance with the schedule. When aviation and maritime-related emissions were moved to the International Civil Aviation Organisation and International Maritime Organisation, all UNFCCC parties had agreed to it. Similarly, moving HFCs to the Montreal Protocol will have to be agreed to by all parties under UNFCCC.
