IATA Passenger Services Conference Resolutions ManualArchived February 1, 2014, at the Wayback Machine (PSCRM), 33rd Edition, Resolution 740, Secrion 5.1.2; however, this source does not reference how airlines commonly use that digit. It only states that values three through nine are for "interline and on-line use".
IATA Passenger Services Conference Resolutions ManualArchived February 1, 2014, at the Wayback Machine (PSCRM), 33rd Edition, Resolution 740, Secrion 5.1.2; however, this source does not reference how airlines commonly use that digit. It only states that values three through nine are for "interline and on-line use".
