Which statement is true regarding IFR flights in ICAO controlled airspace?

The accurate statement regarding IFR flights in ICAO controlled airspace is that clearance for a VOR or ILS approach does not waive FM immunity requirements.

This is significant because FM (Facility Management) immunity means that pilots must ensure that their equipment – such as VOR or ILS receivers – can operate correctly and reliably within the constraints set by air traffic control. Clearance to perform a specific approach does not negate the responsibility of the pilot or the equipment's compliance with established immunity standards. It is imperative for the integrity of the flight operation that the necessary operational requirements, including FM immunity, are met irrespective of the specific procedures or clearances granted for approaches.

Understanding this principle is crucial for pilots to ensure they remain compliant with regulations and maintain safety within controlled airspace. While VFR (Visual Flight Rules) clearances may relate to other operational aspects, they do not directly affect the FM immunity requirements for IFR flights either.