Related Rule
Canada
Practice Relating to Rule 146. Reprisals against Protected Persons
Section D. Civilians in the power of the adversary
Canada’s LOAC Manual (1999), in a chapter entitled “Treatment of civilians in the hands of a party to the conflict or an occupying power” and, more specifically, in a section containing “Provisions common to the territories of the parties to the conflict and to occupied territories”, refers to the 1949 Geneva Convention IV and states: “The following are expressly prohibited: … the taking of reprisals against protected persons and their property”. 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 11-4, § 33.
In a section dealing with enforcement measures, the manual further provides: “Reprisals are permitted against combatants and against objects constituting military objectives.” 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 15-2, § 16.
In the same section, the manual also states: “Reprisals against the following categories of persons and objects are prohibited: … d. civilians in the hands of a party to the conflict of which they are not nationals, including inhabitants of occupied territory”. 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 15-2, § 15.
Canada’s LOAC Manual (2001), in its chapter on the treatment of civilians in the hands of a party to the conflict or an occupying power and, more specifically, in a section entitled “Provisions common to the territories of the parties to the conflict and to occupied territories”, states:
[The 1949 Geneva Convention IV] prohibits taking any measure, which will cause physical suffering to protected persons or will lead to their extermination. This prohibition applies not only to murder, torture, corporal punishment, mutilation or medical or scientific experiments not necessitated by the medical treatment of a protected person, but also to any other form of brutality, whether applied by civilians or by military personnel. The following are expressly prohibited:
d. the taking of reprisals against protected persons and their property. 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 1121.2.d.
In its chapter on rights and duties of occupying powers, the manual further states:
1223. Control of persons in occupied territory
3. The following measures of population control are forbidden at all times:
d. punishment for acts of others, that is, reprisals or collective penalties. 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 1223.3.d.
In its chapter entitled “Preventative and enforcement measures and the role of protecting powers”, the manual also states:
4. Reprisals against the following categories of persons and objects are prohibited.
d. civilians in the hands of a party to the conflict of which they are not nationals, including inhabitants of occupied territory;
5. Reprisals are permitted against combatants and against objects constituting military objectives. 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 1507.4.d and 5.