Соответствующая норма
Nigeria
Practice Relating to Rule 100. Fair Trial Guarantees
Nigeria’s Manual on the Laws of War provides that “wilfully depriving prisoners of war and civilians of the rights to a fair and regular trial” is a grave breach of the 1949 Geneva Conventions and is considered as a serious war crime. 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 6(b) and (c).
The manual further states: “In any case, it must be ensured that no punishment is imposed on a prisoner of war without a fair trial.” 
Nigeria, The Laws of War, by Lt. Col. L. Ode PSC, Nigerian Army, Lagos, undated, § 44.
Nigeria’s Geneva Conventions Act (1960) punishes any person who “whether in or outside the Federation, … whatever his nationality, commits, or aids, abets or procures any other person to commit any such grave breach of any of the [1949 Geneva] Conventions”. 
Nigeria, Geneva Conventions Act, 1960, Section 3(1).