To become a commercial pilot in Australia, candidates must meet eligibility requirements set by the Civil Aviation Safety Authority (CASA), including being at least 18 years old to hold a Commercial Pilot Licence (CPL), though training can begin earlier with a Student Pilot Licence. Applicants must demonstrate English language proficiency (as required under ICAO standards) to ensure safe radio communication, and while CASA does not mandate specific high school subjects, most flight schools strongly recommend or require a Year 12 qualification with mathematics and physics, as these subjects support understanding of navigation, aerodynamics, meteorology, and aircraft performance calculations. In cases where students lack these subjects, bridging courses or aptitude assessments may be accepted by certain academies. A key requirement before CPL issuance is obtaining a Class 1 Aviation Medical Certificate from a CASA-designated aviation medical examiner, which evaluates vision, hearing, cardiovascular health, and overall physical and mental fitness to ensure the candidate can safely operate commercial aircraft; maintaining this medical certification is essential for both licensing and long-term career sustainability in the aviation industry.