When listed as OBO (OFFICIAL BUSINESS ONLY), what does it imply about using an airfield?

When an airfield is designated as OBO (OFFICIAL BUSINESS ONLY), it implies that landing at that airfield requires prior permission. This designation is used to manage traffic and ensure that the airfield is used appropriately for its intended purposes, specifically for official governmental or military operations.

Landings without advance permission would not typically align with the intended operational policies governing such facilities. This ensures that air traffic control can maintain safety and efficiency at the airfield, monitoring and granting access to aircraft engaged in official duties.

The restrictions implied by the OBO designation are crucial for maintaining order and ensuring that the airfield can serve its primary function related to official business, while also potentially limiting use by personal or non-official flights.