Other Principal Organs — ECOSOC, the Secretariat and the Trusteeship Council — Public International Law Notes

Other Principal Organs — ECOSOC, the Secretariat and the Trusteeship Council

On 1 November 1994, one of the six principal organs of the UN simply switched itself off. The tiny Pacific territory of Palau had become independent — the last of the eleven trust territories to do so — and with no more territories to supervise, the Trusteeship Council suspended operations. It is the only principal organ to have worked itself out of a job. That story tells you these three organs are the “supporting cast”: important, worth a short note, but not the marquee questions of the unit.

The three remaining organs — take each in one paragraph

Article 7 of the Charter created six principal organs. You have met three — the General Assembly, the Security Council and the ICJ. Here are the other three, each a favourite short-note topic.

Composition (Art. 61) — 54 members, elected by the General Assembly for three-year terms (eighteen replaced each year); each has one vote and decisions are by simple majority.
Functions — it is the UN’s co-ordinating organ for economic and social work — economic, cultural, educational, health and humanitarian matters (Arts. 62–66). It makes studies and recommendations, drafts conventions for the GA, and — crucially — co-ordinates the specialised agencies (the ILO, WHO, UNESCO, IMF, the World Bank and others) through agreements under Arts. 57 and 63. It sets up functional and regional commissions (Art. 68), including the Commission on Human Rights.

B. The Secretariat and the Secretary-General

The Secretariat (Art. 97) is the UN’s permanent civil service — the international staff who service the other organs — headed by the Secretary-General (SG), the “chief administrative officer” of the Organisation.
Appointment — the SG is appointed by the General Assembly upon the recommendation of the Security Council (so the veto applies), for a term of (by practice) five years, renewable.
Functions — administrative (Art. 98: acting as secretary at all meetings of the organs and performing functions entrusted by them) and political: under Art. 99 the SG may bring to the attention of the Security Council any matter which in his opinion may threaten international peace and security — the organ’s one genuinely political power of initiative.
Independence (Art. 100) — the SG and staff are international officials, responsible only to the UN; they must neither seek nor receive instructions from any government.

C. The Trusteeship Council

Purpose (Chapters XII–XIII, Art. 86) — to supervise the administration of trust territories (former mandates and colonies detached after the wars) and to promote their progressive advancement towards self-government or independence.
Present status — its work is complete. With Palau’s independence, it suspended operations on 1 November 1994; it no longer meets regularly. (It has not been formally abolished, which would need a Charter amendment.)

Article 99, UN Charter (1945): “The Secretary-General may bring to the attention of the Security Council any matter which in his opinion may threaten the maintenance of international peace and security.”

In Simple Terms: Three quieter organs round out the six. ECOSOC (54 members, 3-year terms) is the UN’s co-ordinator for economic and social work and the boss of the specialised agencies. The Secretariat, led by the Secretary-General (appointed by the GA on the SC’s recommendation for five years), is the UN’s civil service — and the SG can even put a threat to peace on the Council’s agenda (Art. 99). The Trusteeship Council supervised the old trust territories and, its task finished, has been dormant since 1994.

🧩 WORKED EXAMPLE — the Secretary-General and a brewing crisis

Facts. The Secretary-General learns that tensions between States P and Q are escalating toward armed conflict, but no member State has referred the matter to the Security Council. Can the SG act?

Rule. Under Art. 99, the Secretary-General may bring to the attention of the Security Council any matter which in his opinion may threaten international peace and security.

Apply. The decoy is that the SG is “only an administrator” and must wait for a State to raise the matter. Art. 99 says otherwise: it gives the SG an independent, political right of initiative — he need not wait for a member to act.

Conclusion. The SG may himself put the P–Q situation before the Council under Art. 99; this is the Secretariat’s most important political function.

flowchart TD
    A["Other principal organs (Art. 7)"]
    A --> B["ECOSOC: 54 members, 3-yr terms;<br/>co-ordinates economic/social work<br/>& specialised agencies (Arts. 61-66)"]
    A --> C["Secretariat / Secretary-General:<br/>chief admin officer (Art. 97);<br/>GA appoints on SC recommendation, 5 yrs;<br/>Art. 99 political initiative; Art. 100 independence"]
    A --> D["Trusteeship Council: supervised trust territories<br/>(Art. 86); dormant since 1 Nov 1994"]
    classDef box fill:#e8f0fe,stroke:#333,color:#111;
    class A,B,C,D box;

Case Laws

Reparation for Injuries Suffered in the Service of the UN (1949, ICJ, Advisory Opinion) — the UN, acting through its Secretariat and organs, may bring an international claim for injury to its agents, confirming its legal personality.
Effect of Awards of Compensation Made by the UN Administrative Tribunal (1954, ICJ, Advisory Opinion) — the GA, having created a tribunal to do justice between the UN and its Secretariat staff, is bound by its awards; supports the standing of the international civil service.

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Other Principal Organs — ECOSOC, the Secretariat and the Trusteeship Council — Public International Law Notes