Practice Relating to the Use of Prohibited Weapons
Israel’s Manual on the Rules of Warfare (2006) states:
The IDF complies with the compulsory rules of warfare in the field and the weapons at its disposal comply with international standards. The ban on soldiers initiating ‘improvements’ in weaponry originates not only in IDF orders but also results from safety considerations and an international ban on the use of prohibited weapons under the rules of war. 
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).
In its judgement in Physicians for Human Rights v. O.C. Southern Command in 2003, Israel’s High Court of Justice reviewed arguments made by petitioners and by the Israel Defense Forces (IDF) on the legality of the use of flechette shells, before concluding on the matter:
Petitioners request an order nisi that will order the Israeli Defense Forces, in the context of its operations in the Gaza Strip, to cease using flechette shells. A flechette shell contains a cluster of steel darts. When a flechette shell detonates, at a certain height above the ground, these darts are dispersed over an area of several hundred square meters. Like other armaments that contain submunitions—such as cluster bombs — flechettes are intended to be used against field targets, as opposed to distinct, individual targets.
According to petitioners, the use of flechette shells violates the laws of war, which prohibit the use of weapons that do not discriminate between combatants and non-combatants. Petitioners point to two instances in which flechette shells have caused civilian deaths. In the first incident, a flechette shell was used to respond to fire upon a military position in Netzarim, in the Gaza Strip. The shell landed near a Bedouin encampment and caused the deaths of three women. In the second incident, flechette shells were fired upon individuals suspected of being terrorists, on their way to carry out a terrorist attack. In this incident, three youths were killed. As such, petitioners assert that the use of flechette shells is illegal, and that the IDF should be completely prohibited from using such shells.
Respondents assert that the question of whether to prohibit the use of flechette shells, in the context of the United Nations Convention on Prohibitions or Restrictions on the Use of Certain Conventional Weapons Which May Be Deemed to be Excessively Injurious or to Have Indiscriminate Effects (1980) [hereinafter The 1980 Convention on Certain Conventional Weapons], has been raised several times before various international forums. However, a prohibition against the use of flechette shells has never received significant international support. The 1980 Convention on Certain Conventional Weapons completely prohibited the use of other weapons. Israel joined this treaty in 1995, subsequently ratified it, and sees itself as bound by its provisions. But this treaty does not ban the use of weapons that contain submunitions, such as flechette shells. As such, petitioner's claim that the use of flechette shells is prohibited by the law of war is incorrect, and should be rejected.
Petitioners request that we prohibit the military from using flechette shells. As the use of such artillery is not prohibited by international conventions, we cannot grant their petition. Our decisions have stated that “this Court will not intervene in the choice of military weapons, which the respondents use in order to prevent vicious terrorist attacks.” See HCJ 5872/01 Barake v. The Prime Minister. We further note that we think the IDF has properly set out the conditions under which the use of flechettes is authorized. Of course, the question of whether the use of flechettes is justified under individual circumstances is given to the discretion of the authorized commander. This commander will act according the military directives, which are intended to prevent casualties among residents who do not endanger the IDF forces or Israeli civilians. 
Israel, High Court of Justice, Physicians for Human Rights v. O.C. Southern Command, Judgement, 27 April 2003.
In 2009, in a report on Israeli operations in Gaza between 27 December 2008 and 18 January 2009 (the “Gaza Operation”, also known as “Operation Cast Lead”), Israel’s Ministry of Foreign Affairs stated:
The IDF [Israel Defense Forces] uses only weapons and munitions defined as legal under international law and authorised as such by the relevant IDF authorities, including MAG [Military Advocate General’s Corps] officers. In this regard, the IDF complies strictly with the applicable restrictions governing the use of certain weapons and munitions. Furthermore, all weapons and munitions are employed in accordance with the general rules of International Humanitarian Law. 
Israel, Ministry of Foreign Affairs, The Operation in Gaza 27 December 2008–18 January 2009: Factual and Legal Aspects, 29 July 2009, § 405; see also § 225.