Related Rule
India
Practice Relating to Rule 47. Attacks against Persons Hors de Combat
Referring to India’s Army Act, the Report on the Practice of India states that any violation of the “duty not to attack someone who is incapable or unwilling to fight” may constitute “disgraceful conduct of a cruel, indecent or unnatural kind”. 
Report on the Practice of India, 1997, Chapter 2.1, referring to the Army Act, 1950, Section 46.