Related Rule
South Africa
Practice relating to Rule 66. Non-Hostile Contacts between the Parties to the Conflict
Section A. General
South Africa’s LOAC Teaching Manual (2008) states:
2.9 Actions of Intermediaries
Protecting Powers
When direct contacts between commanders or contacts through bearers of flag of truce or similar persons are not possible, the commanders may also ask for cooperation from the Protecting Power (or from intermediaries such as the International Committee of the Red Cross). 
South Africa, Advanced Law of Armed Conflict Teaching Manual, School of Military Justice, 1 April 2008, as amended to 25 October 2013, Learning Unit 2, pp. 168–170.