Related Rule
Nigeria
Practice Relating to Rule 142. Instruction in International Humanitarian Law within Armed Forces
Section B. Obligation of commanders to instruct the armed forces under their command
Nigeria’s Military Manual (1994) recalls: “Commanders are … enjoined to ensure that members of the armed forces under their command are aware of their obligations under the [1949 Geneva] conventions and the [1977 Additional Protocols I and II]”. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 30, § 3.
In addition, the manual states:
Every commander … holds full responsibility for proper law of war training within his sphere of authority and it is his duty to determine the needs of his subordinate which shall be integrated into the normal exercise of military activities. 
Nigeria, International Humanitarian Law (IHL), Directorate of Legal Services, Nigerian Army, 1994, p. 41, § 8.