Commonwealth Consolidated Regulations Commonwealth Consolidated RegulationsA person's aviation English language proficiency assessment is current as follows:
(a) if the person was assessed as meeting the ICAO level 6 aviation English language proficiency standards--indefinitely;
(b) if the person was assessed as meeting the ICAO level 5 aviation English language proficiency standards--for 6 years beginning on the day the assessment is conducted;
(c) if the person was assessed as meeting the ICAO level 4 aviation English language proficiency standards--for 3 years beginning on the day the assessment is conducted.