The preamble to the agreement considers that “preclearance facilitates air travel between the two countries and is of mutual benefit to both Parties” and that “preclearance should be continued (and established) for eligible flights at various locations in Canada and the United States, where the facilities and other conditions are adequate to enable the Canadian and the United States inspection agencies to carry out their missions, with respect to the examination and inspection of passengers and their possessions, aircraft crew, baggage and aircraft stores entering Canada and the United States.”