The maximum flight duty period for a pilot with a commercial operator depends on which factors?

The maximum flight duty period for a pilot under a commercial operator is influenced by various factors, key among them being the reporting time and the number of scheduled flights. Reporting time refers to when a pilot is expected to be available for duty, and this time can significantly determine the overall length of a pilot's duty period. The number of scheduled flights directly affects how long pilots can operate within a duty day, as each flight adds to the total operational time.

Regulations typically stipulate limitations on flight time and on-duty time to mitigate fatigue and maintain safety. By establishing these limits based on reporting times and the specific number of flights, authorities ensure that pilots maintain an adequate level of alertness and performance. Hence, this option correctly captures the essence of regulations governing a pilot's maximum duty time in a commercial environment.