Соответствующая норма
Nigeria
Practice Relating to Rule 55. Access for Humanitarian Relief to Civilians in Need
In 1968, during the conflict in Biafra, the Nigerian Commissioner for Information and Labour insisted that Nigeria “would continue to stand by its promise to the International Committee of the Red Cross to keep some ‘corridors of mercy’ safe from military activities so that relief supplies could at any time be channelled through these corridors”. 
Nigeria, Federal Ministry of Information, Press Release No. F 1290, Lagos, 11 July 1968, Report on the Practice of Nigeria, 1997, Chapter 4.2.