Which is a characteristic of operations conducted under DOD 4540.01?

Operations conducted under DOD 4540.01 are characterized by the allowance for deviations from the International Civil Aviation Organization (ICAO) regulations when it is deemed necessary. This flexibility acknowledges that military operations often have unique requirements and operational contexts that may not align perfectly with civilian aviation standards.

In certain situations, especially those involving national security, safety, or mission effectiveness, the military may find it essential to alter standard procedures outlined by the ICAO. This adaptability is vital for the effective execution of military missions while still striving to maintain a level of compliance with established regulations.

The other options do not accurately reflect the operational flexibility allowed under DOD 4540.01, as there is an inherent understanding in military operations that strict adherence to ICAO procedures may not always be feasible or practical.