Who or what is ICAO, and where does it fit in?
ICAO is the International Civil Aviation Organization, an agency of the United Nations. ICAO was formed as a result of the Chicago Convention of December 1944. It is charged with (among other things) the development and maintenance of the Technical Instructions for the Safe Transport of Dangerous Goods by Air – the set of international rules for shipping dangerous goods by air. These Technical Instructions are based on the UN Recommendations on the Transport of Dangerous Goods – Model Regulations. ICAO, as well as IATA, is headquartered in Montreal, Canada.