To obtain a Commercial Pilot License (CPL), students must pass written exams on subjects such as navigation, meteorology, air regulations, flight planning, and aircraft technical knowledge. They also need to complete a practical skill test/checkride where an examiner evaluates flying ability, emergency handling, and decision-making skills. In addition, candidates must hold a valid Class 1 aviation medical certificate, which checks vision, hearing, physical fitness, and overall health to ensure they are fit to fly professionally.