Related Rule
Practice Relating to Rule 48. Attacks against Persons Parachuting from an Aircraft in Distress
Under Nigeria’s Manual on the Laws of War, “shooting at survivors of an enemy aircraft that has been hit” is an “illegitimate tactic”, while “shooting at enemy paratroopers” is a “legitimate tactic”. 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 14.