A recreational pilot with less than 400 hours' flight time may not act as pilot in command unless the pilot has?

A recreational pilot with less than 400 hours of flight time is subject to specific regulations to ensure they maintain proficiency and safety in their flying abilities. The requirement to have logged pilot-in-command time in the last 180 days is particularly important because it ensures that the pilot is currently skilled and competent in operating an aircraft.

This regulation is in place to reinforce the importance of regular practice and experience in flying. A lack of recent flying experience may lead to skill degradation, which can increase the risk of accidents. Therefore, maintaining a certain amount of recent pilot-in-command time is a critical safety measure.

The other options do touch upon aspects of flight training and medical fitness, but they do not directly pertain to the requirement of having recent flying experience, which is crucial for safe pilot operations.