Related Rule
Argentina
Practice Relating to Rule 48. Attacks against Persons Parachuting from an Aircraft in Distress
Argentina’s Law of War Manual (1969) provides:
It is prohibited to open fire at persons who descend by parachute from aircraft in technical emergency. This prohibition, however, does not apply to members of airborne units and to any other parachutist descending on enemy territory on hostile mission. 
Argentina, Leyes de Guerra, RC-46-1, Público, II Edición 1969, Ejército Argentino, Edición original aprobado por el Comandante en Jefe del Ejército, 9 May 1967, § 1.009.
Argentina’s Law of War Manual (1989) states:
It is prohibited … to attack persons bailing out with parachutes from an aircraft in distress … When reaching the ground, they must be offered the opportunity to surrender before being attacked, unless they commit hostile acts. This rule does not apply to airborne troops. 
Argentina, Leyes de Guerra, PC-08-01, Público, Edición 1989, Estado Mayor Conjunto de las Fuerzas Armadas, aprobado por Resolución No. 489/89 del Ministerio de Defensa, 23 April 1990, § 1.06(6).