القاعدة ذات الصلة
Canada
Practice Relating to Rule 25. Medical Personnel
Section B. Equipment of medical personnel with light individual weapons
Canada’s LOAC Manual (1999) lists among the conditions not depriving medical units of their protection the fact “that the personnel of the medical unit are armed for their own defence or that of the wounded and sick in their charge”. 
Canada, The Law of Armed Conflict at the Operational and Tactical Level, Office of the Judge Advocate General, 1999, p. 4-9, § 91(a).
Canada’s Code of Conduct (2001) provides: “Personnel of a medical unit or establishment may be armed with small arms and may use those arms in defence of themselves or of the wounded and sick under their charge.” 
Canada, Code of Conduct for CF Personnel, Office of the Judge Advocate General, 4 June 2001, Rule 10, § 6.
Canada’s LOAC Manual (2001) states in its chapter on targeting:
447. Medical units and establishments
3. The protection to which medical units are entitled shall not cease unless they are used to commit, outside their humanitarian function, acts harmful to the enemy …
4. The following are not considered “acts harmful to the enemy” and do not deprive medical units of protection:
a. that the personnel of the medical unit are armed for their own defence or that of the wounded and sick in their charge;
448. Medical transports
2. Medical transports should not be armed (i.e., crew-served weapons) because of the danger that they may be mistaken as fighting vehicles. Medical personnel in the medical transports can, however, retain their personal weapons. 
Canada, The Law of Armed Conflict at the Operational and Tactical Levels, Office of the Judge Advocate General, 13 August 2001, §§ 447.3, 4.a and 448.2.
Canada’s Code of Conduct (2005) provides:
Personnel of a medical unit or establishment may be armed with small arms and may use those arms in defence of themselves or of the wounded and sick under their charge. Pickets or sentries equipped with small arms consisting of non-medical personnel, can be used without adversely affecting the protected status of the medical establishment or unit. As a general rule medical transports should not have any weapons “mounted” on them to avoid being mistaken for fighting vehicles. 
Canada, Code of Conduct for CF Personnel, Office of the Judge Advocate General, 2005, Rule 10, § 6.