The Security Council has created working groups that consist of representatives of the members of the Security Council to discuss a range of issues related to the general work of the Council such as procedural questions, peacekeeping operations and protections of civilians. Below is a list of all the working groups established by the Security Council, with a short description prepared on the basis of the content of the Repertoire, as well as links to the sections covering them in the Repertoire.

The Security Council has requested the Secretary-General to appoint a variety of representatives and other individuals to assist the Council in addressing situations that threaten international peace and security. In some cases, the Security Council has asked the Secretary-General to use his good offices to address a situation directly.  Between 1988 and 2007, the Repertoire has generally not included coverage of representatives and special representatives of the Secretary-General or his good offices.

This section provides information on subsidiary organs that were formally proposed but were not established, usually due to a failure to win sufficient support for adoption of a resolution. Information is provided on the decision-making process, discussion in the Council and any related documents, such as reports or draft resolutions. In earlier volumes, these were divided between proposed missions based in the field, and those that were based at Headquarters in New York.

In some periods, the Repertoire has provided additional material related to subsidiary organs.

Consideration of procedures relative to subsidiary organs

This section provided case studies covering the Council consideration on the procedures relating to subsidiary organs, including procedures relating to establishment, consultation between permanent members, delegation of functions, modification of terms of reference and termination.

This page covers missions undertaken or authorized by the Security Council that were featured as subsidiary organs of the Security Council in the Repertoire. These include both Missions that are made up of members of the Security Council itself, as well as those in which the Secretary-General was requested to undertake a mission on behalf of the Security Council.

Article 41 of the United Nations Charter gives the Security Council the authority to use a variety of measures to enforce its decisions. The Council regularly creates subsidiary organs to support or implement these measures. These organs have included international tribunals which have tried people responsible for serious crimes under international humanitarian law or in cases where the Government has requested the assistance of the Council in investigating and prosecuting cases.