Ruwantissa Abeyratne has worked in the field of aviation law and management for over thirty years. He is senior associate, Air Law and Policy at Aviation Strategies International, both of which are consultancies headquartered in Montreal. At retirement from the International Civil Aviation Organization after 23 years of service at various senior positions in air transport and air law, Dr. Abeyratne was Senior Legal Officer, heading the Treaty Office of ICAO. He also advised States on their registration and depository obligations with regard to international treaties and their adherence thereto and was General Counsel for ICAO staff members. Prior to his service at ICAO, Dr. Abeyratne was, for 8 years at Airlanka, serving the airline as Chief Coordinator and Head of International Relations and Insurance.