Legal experts and human rights advocates often disagree on this point. The UK government argues that providing fuel via tankers does not constitute direct participation in a kinetic strike. Under this view, refuelling provides logistical endurance rather than the weapon itself. This distinction rests on the idea that the fuel is a general supply, not a specific component of a targeted attack.
However, international law, specifically regarding complicity in war crimes, looks at more than just the hardware. The principle of aiding and abetting requires looking at whether a state provides practical assistance that has a substantial effect on a crime. If a tanker enables a fighter jet to reach a target it otherwise could not hit, the connection becomes direct. Critics argue that calling this 'defensive support' is a semantic shield to avoid accountability under the Rome Statute or the Geneva Conventions.
The debate hinges on the intent and the foreseeable outcome. If the state knows the aircraft will engage in strikes that may violate International Humanitarian Law (IHL), the legal risk increases. Currently, no international court has issued a definitive ruling specifically penalizing logistical fuel transfers as direct complicity in recent conflicts. This leaves a grey area in modern aerial warfare.
