The Court generally discharges its duties as a full Court (a quorum of nine judges, excluding judges ad hoc, being sufficient). But it may also form permanent or temporary chambers.
The Court has three types of chamber:
With respect to the formation of a Chamber pursuant to Article 26, paragraph 1, of the Statute, it should be noted that in 1993 the Court created a Chamber for Environmental Matters, which was periodically reconstituted until 2006. However, in the Chamber’s 13 years of existence no State ever requested that a case be dealt with by it. The Court consequently decided in 2006 not to hold elections for a Bench for the said Chamber.
The provisions of the Rules concerning chambers of the Court are likely to be of interest to States that are required to submit a dispute to the Court, or have special reasons for doing so, but prefer, for reasons of urgency or other reasons, to deal with a smaller body than the full Court.
Despite the advantages that chambers can offer in certain circumstances, under the terms of the Statute their use remains exceptional. Their formation requires the consent of the parties. While, to date, no case has been heard by either of the first two types of chamber, by contrast six cases have been dealt with by ad hoc chambers.
The current composition of this Chamber which, at the request of the parties, may hear and determine cases by summary procedure is as follows:
No such chamber is currently active.
The first ad hoc chamber was formed in 1982 in the case concerning the Delimitation of the Maritime Boundary in the Gulf of Maine Area between Canada and the United States, and the second in 1985 in the case concerning the Frontier Dispute between Burkina Faso and the Republic of Mali. The third was set up in March 1987 in the case concerning Elettronica Sicula S.p.A. (ELSI) between the United States of America and Italy, and the fourth was formed in May 1987 in the case concerning the Land, Island and Maritime Frontier Dispute between El Salvador and Honduras. 2002 saw the formation of the fifth, to deal with the Frontier Dispute (Benin/Niger) case, and the sixth, to hear the Application for Revision of the Judgment of 11 September 1992 in the Case concerning the Land, Island and Maritime Frontier Dispute (El Salvador/Honduras: Nicaragua intervening) (El Salvador v. Honduras).
Every Chamber has comprised five members. The Chamber which sat in the Gulf of Maine case comprised four Members of the Court (one of whom possessed the nationality of one of the parties) and one judge ad hoc chosen by the other party. The Chamber formed in the Frontier Dispute (Burkina Faso/Republic of Mali) case comprised three Members of the Court and two judges ad hoc chosen by the parties. The Chamber formed in the Elettronica Sicula S.p.A. (ELSI) case comprised five Members of the Court (two of whom possessed the nationality of one of the parties). The Chamber which sat in the case concerning the Land, Island and Maritime Frontier Dispute comprised three Members of the Court and two judges ad hoc chosen by the parties, as did the two Chambers formed in 2002.
Administrative decisions are prepared for the full Court by a Budgetary and Administrative Committee composed of the President (chair), the Vice-President and four or five other judges elected triennially.
The present composition of the Committee is as follows:
In 1979, the Court established a standing Rules Committee. This committee advises the Court on procedural issues and working methods.
The present composition of the Committee is as follows:
Established in 1970, the Library Committee oversees the library's programme of acquisitions and supervises its ongoing modernization.
The present composition of the Committee is as follows: