Related Rule
Argentina
Practice Relating to Rule 17. Choice of Means and Methods of Warfare
Argentina’s Law of War Manual (1989) states:
Those who plan or decide upon an attack shall, as far as possible, take all precautions in the choice of means and methods of attack in order to minimize the loss of civilian life, injury to civilians and damage to civilian objects which the attack may incidentally cause. 
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, § 4.07(1).