Related Rule
Israel
Practice Relating to Rule 70. Weapons of a Nature to Cause Superfluous Injury or Unnecessary Suffering
With reference to Israel’s Law of War Booklet (1986), the Report on the Practice of Israel states that “Israel and the IDF [Israel Defense Forces] accept and comply with the provisions of customary international law in relation to the prohibitions and restrictions on the use of weapons” which cause superfluous and unnecessary suffering. 
Report on the Practice of Israel, 1997, Chapter 3.1, referring to Conduct in the Battlefield in Accordance with the Law of War, Israel Defense Forces, 1986, p. 11.
Israel’s Manual on the Laws of War (1998) states: “Since St. Petersburg, there have been several universally accepted rules regarding weapons: … Weapons causing needless suffering are prohibited.” 
Israel, Laws of War in the Battlefield, Manual, Military Advocate General Headquarters, Military School, 1998, p. 11.
Israel’s Manual on the Rules of Warfare (2006) states: “It is forbidden to use means of warfare that cause unnecessary suffering.” 
Israel, Rules of Warfare on the Battlefield, Military Advocate-General’s Corps Command, IDF School of Military Law, Second Edition, 2006, p. 13.
The Manual on the Rules of Warfare (2006) is a second edition of the Manual on the Laws of War (1998).
Upon accession to the 1980 Convention on Certain Conventional Weapons, Israel stated:
With reference to the scope of application defined in article 1 of the Convention, the Government of the State of Israel will apply the provisions of the Convention and those annexed Protocols to which Israel has agreed to become bound to all armed conflicts involving regular forces of States referred to in article 2 common to the Geneva Conventions of 12 August 1949, as well as to all armed conflicts referred to in article 3 common to the Geneva Conventions of 12 August 1949. 
Israel, Declarations and understandings made upon accession to the Convention on Certain Conventional Weapons, 22 March 1995, § (a).