What is required for a commercial pilot to act as pilot-in-command?

To act as pilot-in-command, a commercial pilot must hold a current and valid medical certificate, as well as have the necessary flight experience. The medical certificate ensures that the pilot meets the health and fitness standards set by the FAA, which is crucial for safety in aviation operations. Additionally, flight experience is essential as it reflects the pilot's proficiency and ability to manage the aircraft effectively during flight operations.

While a valid pilot's license is necessary for all pilots, it is implied within the broader requirement of having the appropriate flight experience and current medical status. Logbook endorsements are important for specific aircraft or situations, but they alone do not fulfill the overall requirements for piloting as captain. ATC approval is needed for some operations but does not relate to the basic qualifications a pilot must have to act as pilot-in-command. Thus, focusing on the combination of flight experience and maintaining a current medical certificate captures the essence of being qualified to serve in that critical role.