Which statement is true regarding the authorization of formation flights?

The correct statement regarding the authorization of formation flights is that they are not authorized when carrying passengers for hire. Formation flights, which involve multiple aircraft flying together in a coordinated manner, have specific regulatory restrictions, particularly when safety and passenger transport are involved.

When transporting passengers for hire, safety regulations impose stricter guidelines, and formation flying can complicate operational safety. This is primarily due to factors like the increased complexity of flight coordination, potential for miscommunication between pilots, and the challenges in maintaining visual flight rules which are crucial in ensuring passenger safety. Therefore, operating in formation while carrying paying passengers is prohibited to minimize risks associated with both the safety of passenger transport and the operational integrity of the flight.

The remaining statements contain conditions that do not align with established regulations for formation flying, such as visibility requirements or carrying passengers in specific scenarios, further emphasizing the unique restrictions around carrying passengers for hire in formation flight operations.