Final answer:
To act as pilot in command of either a complex or high performance airplane, you need to meet specific requirements and hold the appropriate licenses and endorsements.
Step-by-step explanation:
To act as pilot in command of either a complex or high performance airplane, you need to have a certain set of requirements and qualifications. First, you must hold a valid pilot's license issued by the aviation authority of your country. Additionally, you must have specific training and endorsements for complex or high performance aircraft. For complex airplanes, you typically need to have additional training and endorsement for retractable landing gear, flaps, and a controllable pitch propeller. For high performance airplanes, you need to have additional training and endorsement for airplanes with an engine producing more than 200 horsepower.