For those curious, the Chicago Convention on International Civil Aviation was a UN convention in 1944 that established the rules of international air travel. On

For those curious, the Chicago Convention on International Civil Aviation was a UN convention in 1944 that established the rules of international air travel. One of those rules deals with taxing fuel - see below. Article 24: Aircraft flying to, from or across, the territory of a state shall be admitted temporarily free of duty. Fuel, oil, spare parts, regular equipment and aircraft stores retained on board are also exempted from customs duty, inspection fees or similar charges. Wiki link: https://en.wikipedia.org/wiki/Chicago_Convention_on_International_Civil_Aviation https://en.wikipedia.org/wiki/Chicago_Convention_on_Internat...