Règle correspondante
Canada
Practice Relating to Rule 79. Weapons Primarily Injuring by Non-Detectable Fragments
Canada’s LOAC Manual (1999) provides: “Weapons that cause injury by the use of fragments undetectable by X-ray in the human body are prohibited.” 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 5-3, § 21.
Canada’s LOAC Manual (2001) states in its chapter entitled “Restrictions on the use of weapons”: “Weapons that cause injury by the use of fragments undetectable by X-ray in the human body are prohibited.” 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, § 513.
Upon ratification of the 1980 Convention on Certain Conventional Weapons, Canada stated:
With respect to [the 1980] Protocol I [to the Convention on Certain Conventional Weapons], it is the understanding of the Government of Canada that the use of plastics or similar materials for detonators or other weapons parts not designed to cause injury is not prohibited. 
Canada, Declaration made upon ratification of the Convention on Certain Conventional Weapons, 24 June 1994, § 2.