Final answer:
The minimum distance a refueling vehicle must be positioned from any portion of an aircraft during servicing is determined by the regulations set by the Federal Aviation Administration (FAA).
Step-by-step explanation:
The minimum distance a refueling vehicle must be positioned from any portion of an aircraft during servicing is determined by the regulations set by the Federal Aviation Administration (FAA). In general, an aircraft must maintain a distance of five miles from another plane flying at the same altitude and be 2,000 feet above and below another aircraft (1,000 feet if the altitude is less than 29,000 feet). This ensures safe separation between aircraft and reduces the risk of collisions in the air.