Under what condition are pilots allowed to operate as a formation flight?

Pilots are allowed to operate in formation flight under the condition that prior arrangements are made and that no paying passengers are aboard. This requirement is critical for maintaining safety and regulatory compliance. Formation flying can present unique challenges, as it requires pilots to be highly coordinated and aware of each other's positions and actions.

Making prior arrangements ensures that all involved pilots are in agreement on the formation flight's specifics, including flight paths, altitudes, and emergency procedures. Not having paying passengers is also important, as formation flying can be more risky than standard flight operations, and regulatory frameworks often restrict such activities to ensure passenger safety. Therefore, this option aligns with safety regulations that govern flight operations and the importance of proper communication and planning among pilots involved in formation flying.