Related Rule
Argentina
Practice Relating to Rule 23. Location of Military Objectives outside Densely Populated Areas
Argentina’s Law of War Manual (1989) states: “The parties to the conflict shall, to the extent possible, avoid locating military objectives within or near densely populated areas.” 
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(2).