Related Rule
Practice Relating to Rule 139. Respect for International Humanitarian Law
Section B. Orders and instructions to ensure respect for international humanitarian law
Argentina’s Law of War Manual (1989) provides:
The Geneva Conventions and [the 1977 Additional] Protocol I expressly oblige States not only to respect [those agreements], but also to ensure respect by issuing orders and instructions for that purpose.” 
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, § 8.01.