1. An automated iris recognition identification and billing system for collecting air fares upon entry of a passenger into an aircraft, comprising: account record storage means for centrally storing a plurality of passenger account records, each record including at least (a) iris recognition data sufficient to identify the passenger and (b) designation of a collection method to be used for collecting air fares incurred by the passenger; iris identification means connected to said account record storage means, for recognizing the iris of a person seeking entry to the aircraft to obtain iris feature information sufficient to positively identify said person without the presence of other forms of identification, comparing said iris feature information to said iris recognition data in said passenger account records to match said person seeking entry to a matched passenger account record, and generating a signal identifying the matched passenger account record without requiring further identification; account charging means connected to said iris identification means and said account record storage means, for receiving said signal identifying the matched passenger account record, initiating a financial transaction debiting the identified passenger for the fare, and generating an access permission signal indicating that the financial transaction has been processed without requiring further identification; and access authorization means connected to said account charging means for receiving said access permission signal and, in response to said access permission signal, indicating that the passenger may board the aircraft.