Related Rule
Israel
Practice Relating to Rule 77. Expanding Bullets
Israel’s Manual on the Laws of War (1998) includes dum-dum bullets in the list of prohibited weapons. 
Israel, Laws of War in the Battlefield, Manual, Military Advocate General Headquarters, Military School, 1998, pp. 12–13.
Israel’s Manual on the Rules of Warfare (2006) prohibits the use of “[f]ragmentation bullets or those that expand inside the human body (dum-dum bullets)”. 
Israel, Rules of Warfare on the Battlefield, Military Advocate-General’s Corps Command, IDF School of Military Law, Second Edition, 2006, p. 14.
The Manual on the Rules of Warfare (2006) is a second edition of the Manual on the Laws of War (1998).