Amendments of a purely institutional nature enter into force six months after they are approved by a two-thirds majority vote in either a meeting of the Assembly of States Parties or a review conference.
[3] In June 2010, two sets of amendments to the Rome Statute of the International Criminal Court were adopted by the Review Conference in Kampala, Uganda.
In November 2015, an additional amendment to remove article 124 from the Statute was adopted during the 14th meeting of the Assembly of States Parties in The Hague in the Netherlands.
[4] The amendment had originally been proposed by Belgium and it was forwarded to the Review Conference by the eighth session of the Assembly of States Parties.
[4] The Rome Statute already makes the use of such means of warfare a war crime in international armed conflicts.
Amendments on the crime of aggression were adopted on 11 June 2010 at the Review Conference of the Rome Statute in Kampala, Uganda.
On 14 December 2017, the Assembly of States Parties adopted a resolution fulfilling the second condition, activating the Court's jurisdiction over the crime of aggression as of 17 July 2018.
If the Security Council does not act within six months, the Prosecutor can proceed provided that a Pre-Trial Chamber approves that move.
[6] Article 124 is a transitional provision, which allows a state, upon becoming party to the Statute, to declare that it does not accept the jurisdiction of the Court over war crimes committed in its territory or by its nationals for a period of seven years.
[10] The amendment inserted an article defining the use of weapons which use microbial or other biological agents, or toxins as a war crime.
[11] The amendment inserted an article defining the use of weapons the primary effect of which is to injure by fragments undetectable by x-rays in the human body as a war crime.
On 6 December 2019, at its ninth plenary meeting, the Assembly of States Parties adopted the amendment to article 8 defining the war crime of the intentional use of starvation of civilians as a method of warfare in armed conflicts not of an international character.
[13] The Rome Statute already makes the use of such means of warfare a war crime in international armed conflicts.