Related Rule
Argentina
Practice Relating to Rule 55. Access for Humanitarian Relief to Civilians in Need
Argentina’s Law of War Manual (1969) provides:
Each High Contracting Party shall allow the free passage of all consignments of medical and hospital stores … intended only for civilians of another High Contracting Party, even if the latter is its adversary. It shall likewise permit the free passage of all consignments of essential foodstuffs, clothing and tonics intended for children under fifteen, expectant mothers and maternity cases.
The obligation of a High Contracting Party to allow the free passage of the consignments indicated in the previous paragraph is subject to the condition that this Party is satisfied that there are no serious reasons for fearing:
(a) that the consignments may be diverted from their destination,
(b) that the control may not be effective, or
(c) that a definite advantage may accrue to the military efforts or economy of the enemy through the substitution of the above-mentioned consignments for goods which would otherwise be provided or produced by the enemy or through the release of such material, services or facilities as would otherwise be required for the production of such goods.
The Power which allows the passage of the consignments indicated in the first paragraph of this Article may make such permission conditional on the distribution to the persons benefited thereby being made under the local supervision of the Protecting Powers. 
Argentina, Leyes de Guerra, RC-46-1, Público, II Edición 1969, Ejército Argentino, Edición original aprobado por el Comandante en Jefe del Ejército, 9 May 1967, § 4.006(3).
Argentina’s Law of War Manual (1989) stipulates that the parties shall allow the free passage of all consignments of medical and hospital stores and objects necessary for religious worship intended only for civilians of another contracting party, even if the latter is its adversary. It also provides for the obligation to permit the free passage of all consignments of essential foodstuffs, clothing and tonics intended for children under 15, expectant mothers and maternity cases. 
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.
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.