Related Rule
Argentina
Practice Relating to Rule 124. ICRC Access to Persons Deprived of Their Liberty
Argentina’s Law of War Manual (1969) provides:
Representatives or delegates of the Protecting Powers shall have permission to go to all places where prisoners of war may be, particularly to places of internment, imprisonment and labour, and shall have access to all premises occupied by prisoners of war; they shall be allowed to go to the places of departure, passage and arrival of prisoners who are being transferred. They shall be able to interview the prisoners, and in particular the prisoners’ representatives, without witnesses, either personally or through an interpreter …
Representatives and delegates of the Protecting Powers shall have full liberty to select the places they wish to visit. The duration and the frequency of these visits shall not be restricted. Visits may not be prohibited except for reasons of imperative military necessity, and then only as an exceptional and temporary measure …
The delegates of the ICRC shall enjoy the same prerogatives. The appointment of such delegates shall be submitted to the approval of the Power detaining the prisoners of war to be visited. 
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, § 2.105.