Related Rule
Practice Relating to Rule 138. The Elderly, Disabled and Infirm
Section B. The disabled and infirm
Nigeria’s Military Manual (1994) provides:
Duly recognized civilian hospitals with their staff, as well as land, sea or air transport of … the infirm … are entitled to similar respect and protection as provided in the first and second [Geneva] conventions for their military counterparts. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 18, § 12.