Aviation ELP is a measure of someone’s ability to communicate in English using an aviation-relevant assessment process.
People who use aeronautical radios need to be able to communicate effectively in voice only (for radio), as well as in face-to-face situations like pre-flight briefings, training and interacting with other crew members. From a safety perspective, this communication needs to be in the language that is used locally by pilots and air traffic service providers.
In Australia and many other countries, the language is English.
Standards for language proficiency were established by the International Civil Aviation Organization (ICAO) in 2008 and applied to flight crew licensing in Australia the same year.
If you hold an aviation ELP, you do not need to obtain a General English Language Proficiency (GELP) assessment.