USEFUL LINKS Airport Authority Hong Kong (AAHK) http://www.hongkongairport.com/ Civil Aviation Department (CAD) http://www.cad.gov.hk/ International Air Transport Association (IATA) http://www.iata.org/ International Civil Aviation Organization (ICAO) http://www.icao.int/ Norman Shanks Associates International (NSAI) http://www.nsai.co.uk/