Examiners assess the level in six language areas during the language proficiency check:
Each area is rated at level 1 to 6. The lowest score from all language areas is the final result of the entire proficiency check – ICAO English Level.
ICAO Level 4 – Operational Level – valid for 4 years (minimum operational level of language proficiency)
ICAO Level 5 – Extended Level – valid for 6 years
ICAO Level 6 – Expert Level – unlimited validity (no expiration)