The following amendments are milestones of the protocol which are listed according to the time line.
- 1992 Copenhagen Amendment and Adjustment
The 1992 Fourth Meeting of the Parties in Copenhagen listed methyl bromide, HBFCs and HCFCs as controlled substances; introduced control measures for the production and consumption of methyl bromide and HBFCs, and for HCFC consumption in developed countries; advanced the phase-out schedules for CFCs, halons, carbon tetrachloride and methyl chloroform in developed countries; and set provisions for production and consumption for essential uses of ODS.
- 1995 Vienna Adjustment
The 1995 Seventh Meeting of the Parties in Vienna introduced both control measures for methyl bromide for developing and developed countries and HCFC consumption controls and HBFC production and consumption controls for developing countries.
- 1997 Montreal Amendment and Adjustment
The 1997 Ninth Meeting of the Parties in Montreal introduced additional control measures for methyl bromide for developing countries and accelerated those for developed countries. It also introduced a requirement that all Parties establish import/export licensing systems for trade in ODS.
- 1999 Beijing Amendment and Adjustment
The 1999 Eleventh Meeting of the Parties in Beijing listed bromochloromethane as a controlled substance and introduced production and consumption controls for bromochloromethane, production controls for HCFCs and reporting requirements for methyl bromide used for quarantine and pre-shipment applications.
- 2007 Montreal Adjustment
The 2007 Nineteenth Meeting of the Parties in Montreal revised the control measures for HCFCs in developed and developing countries. Specifically, developing countries agreed to phase out HCFCs by 2030 with possibility of using certain quantities of HCFCs for servicing refrigeration and air conditioning equipment until 2040.
- 2016 Kigali Amendment
The 2016 Twenty-Eighth Meeting of the Parties, made decisions related to the reduction of the projected production and consumption of hydrofluorocarbons (HFCs) by more than 80 per cent over the next 30 years. It came into force on 1st January 2019
- 2018 Quito Adjustment
The 2018 Thirtieth Meeting of the Parties made decisions approving destruction technologies to be used for HFCs; access of Article 5 parties to energy-efficient technologies in the refrigeration, air conditioning and heat pump (RACHP) Sectors, nominations for critical-use exemptions for methyl bromide for 2019 and 2020.