What medical certification is required to exercise privileges of a commercial pilot certificate with a lighter-than-air category?

To operate as a commercial pilot in the lighter-than-air category, no medical certification is required. This is due to the nature of lighter-than-air operations, which differ from those of heavier-than-air aircraft. The FAA regulations specifically outline that individuals flying lighter-than-air aircraft do not need to possess a medical certificate if they are operating within certain limits.

In practice, this means that while having a medical certification might be beneficial for a pilot's overall health and safety, it's not a legal requirement for exercising the privileges of a commercial pilot certificate in this category. This accessibility can encourage wider participation in the sport and hobby of lighter-than-air flight.

The other options, such as requiring a first-class, second-class, or student pilot medical certification, do not apply to lighter-than-air categories, emphasized by the fact that traditional medical certification is often associated with the more complex operational rules governing heavier-than-air flight.