[PRINCESS OF FLYINGWAY]

In order to conform with ICAO Language Proficiency requirements, Pilots, Air Traffic Controllers and all others who use English in R/T communication on international routes must be at ICAO English Language Level 4 (Operational) or above. This must be confirmed by successful completion of an airline industry approved test.
Those who are assessed at ICAO Level 4 must be re-tested every three years. Those who fail may not be licensed to operate on international routes.