Related Rule
Argentina
Practice Relating to Rule 8. Definition of Military Objectives
Argentina’s Law of War Manual (1989) states:
4.02 (2). … military objectives, that is, those objects which by their nature, location, purpose or use make an effective contribution to military action or whose total or partial destruction, capture or neutralization, in the circumstances ruling at the time, offers a definite military advantage.
4.19. Military objective. Military objectives, in so far as objects are concerned, are limited to those objects which by their nature, location, purpose or use make an effective contribution to military action or whose total or partial destruction, capture or neutralization, in the circumstances ruling at the time, offers a definite military advantage. 
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, §§ 4.02(2) and 4.19.