Related Rule
Practice Relating to Rule 55. Access for Humanitarian Relief to Civilians in Need
Section D. Right of the civilian population in need to receive humanitarian relief
Argentina’s Law of War Manual (1989) states that, if the civilian population of any territory under the control of a party to the conflict, other than occupied territory, is insufficiently provided with supplies (such as foodstuffs, medical supplies, means of shelter and other supplies essential to the survival of the civilian population), relief actions of a humanitarian and impartial character shall be undertaken, subject to the agreement of the parties concerned. 
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, § 4.11.