Liechtenstein Becomes First State to Ratify Crime of Aggression


Liechtenstein Becomes First State to Ratify Crime of Aggression
(Coalition for the International Criminal Court), May 8, 2012  

(Ambassador Christian Wenaweser (left), permanent representative of Liechtenstein to the United Nations,
with Benjamin Ferencz (right), former Nuremberg prosecutor.)

Today, 8 May 2012, Liechtenstein became the first state party to the Rome Statute—the founding treaty of the International Criminal Court (ICC)—to ratify the crime of aggression. This crime is one of two new crimes added to the Statute following the 2010 Kampala Review Conference.  It seeks to criminalize the use of armed force by one state against another and in violation of the United Nations (UN) Charter.

The second new crime, which prohibits the use of certain weapons in a non-international armed conflict, (War Crimes) was also ratified by Lichtenstein today. San Marino was the first to ratify this crime on 26 September 2011.

The crime of aggression

At the Review Conference, which took place from 31 May to 11 June 2010 in Kampala, Uganda, ICC states parties adopted provisions governing the terms of the Court's ability to investigate and prosecute individuals for the crime of aggression (article 8bis). States agreed upon a jurisdictional regime for the crime of aggression, which provides separate procedures depending on whether the situation was referred by the UN Security Council, or whether it came before the ICC through a state referral or upon the ICC prosecutor's initiative. The Review Conference determined that the activation of jurisdiction is still subject to a positive decision by the Assembly of States Parties—the Court’s governing body—which cannot be taken before 1 January 2017 and one year after the ratification or acceptance of the amendments by 30 states parties, whichever is later

The unique position of the crime of aggression within the Rome Statute:  In a compromise reached during the negotiation of the Rome Statute in 1998, Article 5 of the Rome Statute lists the crime of aggression as one of the core crimes under the Court’s jurisdiction. However, in contrast to the other three crimes (genocide, crimes against humanity and war crimes), the Court remained unable to exercise jurisdiction over the crime of aggression as the Statute did not define the crime or set out jurisdictional conditions.

Adoption of the crime of aggression in Kampala: after two weeks of intense debate and years of preparatory work, on 11 June 2010, the Review Conference of Rome Statute (held in Kampala, Uganda between 31 May and 11 June 2010) adopted by consensus amendments to the Rome Statute which include a definition of the crime of aggression and a regime establishing how the Court will exercise its jurisdiction over this crime.


The conditions for entry into force decided upon in Kampala provide that the Court will not be able to exercise its jurisdiction over the crime until after 1 January 2017 when a decision is to made by States Parties to activate the jurisdiction.

Definition of the crime of aggression: Article 8 bis adopted in Kampala defines the individual crime of aggression as the planning, preparation, initiation or execution by a person in a leadership position of an act of aggression. Importantly, it contains the threshold requirement that the act of aggression must constitute a manifest violation of the Charter of the United Nations.

An act of aggression is defined as the use of armed force by one State against another State without the justification of self-defense or authorization by the Security Council. The definition of the act of aggression, as well as the actions qualifying as acts of aggression contained in the amendments (for example invasion by armed forces, bombardment and blockade), are influenced by the UN General Assembly Resolution 3314 (XXIX) of 14 December 1974.

The threshold and formulation of this definition, draws heavily upon the pre-existing language and general provisions in the Rome Statute and the UN Charter, and reflects a compromise made by many States and in the lead up to the Review Conference.

The conditions for exercise of jurisdiction: The text of articles 15 bis and 15 ter set out the conditions for the Court’s exercise of jurisdiction over the crime of aggression. In contrast to the other crimes in the Statute, these articles establish a unique jurisdictional regime outlining when the ICC Prosecutor can initiate an investigation into a crime of aggression.

Where a ‘situation’ is referred to the Prosecutor by the UN Security Council, article 15 ter of the Statute provides that the Court’s jurisdiction is triggered in the same manner as with the other crimes in the Statute, meaning the Prosecutor may proceed with an investigation into the crime of aggression.

In contrast to Security Council referrals, under article 15 bisthe Prosecutor may only proceed with an own motion (proprio motu) investigation or an investigation based on a State referral of a situation into the crime of aggression:
after first ascertaining whether the Security Council has made a determination of the existence of an act of aggression (under article 39 of the UN Charter) and waiting for a period of 6 months;
where that situation concerns an act of aggression committed between States Parties; and
after the Pre-Trial Division of the Court has authorized the commencement of the investigation. 

Article 15 bis also provides that States Parties may opt-out of the Court’s jurisdiction under the article by lodging a declaration of non-acceptance of jurisdiction with the Court’s Registrar. Such a declaration can be made at any time (including before the amendments enter into force) and shall be reviewed by the State Party within three years.    

Non-State Parties have been explicitly excluded from the Court’s jurisdiction into a crime of aggression under this article when committed by that State’s nationals or on its territory. 

Both articles 15 bis and 15 ter note that any determination by an organ outside of the Court (such as the Security Council) will be without prejudice to the Court’s own finding of an act of aggression. 

Adoption and entry into force:  The amendments were adopted by consensus in accordance with article 5(2) of the Statute and will enter into force under article 121(5). However, the provisions of both article 15 bis and article 15 ter provide that the Court will not be able to exercise its jurisdiction over the crime of aggression until:
at least 30 States Parties have ratified or accepted the amendments; and
a decision is taken by two–thirds of States Parties to activate the jurisdiction at any time after 1 January 2017. 

Article 8 of the Rome Statute

The amendment to article 8 of the Rome Statute (or "Belgian proposal") extends the use of certain weapons as war crimes in non-international conflicts, namely the use of poison, poisoned weapons, asphyxiating, poisonous or other gases and all analogous liquids, materials or devices as well as the use of bullets that expand or flatten in the body. Read more.

Belgium submitted to the 8th session of the ASP three proposals for amendments to Article 8 of the Rome Statute regarding the criminalization of certain weapons as war crimes. Of the three proposals it was decided that only the first of the proposals put forward by Belgium would be submitted to the Review Conference.

This first proposal extends the criminalization of the use of poison, poisoned weapons, asphyxiating, poisonous or other gases and all analogous liquids, materials or devices as well as the use of bullets that expand or flatten in the body to armed conflicts not of an international character. The use of the weapons listed in this draft amendment is already incriminated by article 8, paragraph 2, b), xvii) to xix) of the Statute in case of an international armed conflict.

The following will be submitted to the Review Conference:

Amendment 1

1. Add to article 8, paragraph 2, e), the following: “ xvii) Employing poison or poisoned weapons;

xviii) Employing asphyxiating, poisonous or other gases, and all analogous liquids, materials or devices;

xix) Employing bullets which expand or flatten easily in the human body, such as bullets with a hard envelope which does not entirely cover the core or is pierced with incisions.”