Air transportation is used to move large and small items when speed is important or when remote areas are inaccessible by land or water (see Aviation). Extensive deregulation of the air transport industry in the mid-1980s favoured the domination of major companies such as Air Canada. The 1995 Open Skies agreement between the US and Canada resulted in an explosion of trans-border services. The National Airports Policy (NAP) was established in July 1994. Under the NAP, the federal government changed its role from airport owner and operator to owner and landlord, but maintained its function as regulator.