As of Oct. 6, 65 countries have agreed to participate in the 2021-2026 voluntary phase of CORSIA: Mexico, Canada, the US, Indonesia, China, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxemburg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, the UK, Albania, Armenia, Azerbaijan, Bosnia and Herzegovina, Georgia, Iceland, Moldova, Monaco, Montenegro, Norway, San Marino, Serbia, Switzerland, Macedonia, Turkey, Ukraine, the Marshall Islands, Singapore, Japan, Malaysia, Kenya, the United Arab Emirates, New Zealand, Guatemala, South Korea, Australia, Thailand, Costa Rica, Papua New Guinea, Qatar and Burkina Faso.