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Congressional Research Service
informing the legislative debate since 1914


                                                                                            Updated March  20, 2024

United Nations Issues: Overview of the United Nations System


The United Nations (U.N.) system comprises
interconnected entities including the United Nations,
specialized agencies, U.N. peacekeeping operations, funds
and programs, and other related bodies. Congress has
generally supported the U.N. system and mission, and often
uses U.N. mechanisms  to further U.S. foreign policy
objectives. At the same time, some policymakers have been
critical of the U.N. system, arguing that U.N. actions or
decisions do not align with U.S. policy priorities, or that it
is not operating as effectively as possible.

U.N. entities have different mandates, structures,
leadership, and funding mechanisms. Each body is funded
through assessed and voluntary contributions from U.N.
members  (or a combination of both). Assessed contributions
are required dues, the payment of which is a legal
obligation accepted by a country when it becomes a
member.  Voluntary contributions finance special funds,
programs, and offices.

The  United  Nations
Established in the aftermath of World War II, the United
Nations is an intergovernmental organization composed of
193 member  states. The U.N. Charter, a treaty to which the
United States is a state party, is the founding document of
the United Nations. Article 1 of the Charter states that the
purposes of the organization are to maintain international
peace and security; develop friendly relations among
nations; solve economic, social, cultural, or humanitarian
problems; and promote human  rights. The United Nations
includes six main parts (referred to as organs).

*  The  193-member  General Assembly   (GA) is the
   organization's primary decisionmaking body. It
   approves the U.N. regular and peacekeeping budgets
   and supports the work of its committees and subsidiary
   organs, such as the U.N. Human Rights Council (HRC).

*  The  15-member  Security Council (SC) is mandated
   with maintaining international peace and security. It
   includes 5 permanent members  with veto power (United
   States, China, France, Russia, and the United Kingdom)
   and 10 nonpermanent  members,  who are elected by the
   GA  for two-year terms.

*  The  Secretariat is the U.N. administrative body located
   at U.N. Headquarters in New York City. It is led by the
   Secretary-General (SG), who serves as chief
   administrative officer. The SG is appointed by the GA
   on the recommendation  of the SC. The SG serves a five-
   year term, with the possibility for a second term.

The three other principal organs are (1) the U.N. Economic
and Social Council, a 54-member body that addresses


economic, social, and environmental issues; (2) the
International Court of Justice, the principal U.N. judicial
body; and (3) the Trusteeship Council, which supervised
the administration of trust territories from colonies to
sovereign nations and completed its mandate in 1994. (For
more information, see CRS Report R47715,  The United
Nations System: Frequently Asked Questions.)

The United Nations is funded through the U.N. regular
budget ($3.6 billion for U.N. FY2024). The United States'
assessed contribution is 22% of the regular budget (an
estimated $707.05 million in U.S. FY2024). Other top
contributors include China (15.25%) and Japan (8.03%).
U.N. members  approve assessment levels every three years
based on a formula taking into account gross national
income  and other economic data. The United States often
accumulates arrears to the regular budget due to differences
between the U.S. and U.N. fiscal years (which affects the
timing of U.S. payments) and U.S. withholdings from U.N.
activities, among other reasons. (For further discussion of
U.N. funding, see CRS In Focus IF10354, United Nations
Issues: U.S. Funding to the U.N. System.)

U.N   Specialized  Agencies
The U.N. system has 15 specialized agencies, each of which
is a legally independent intergovernmental organization
with its own constitution, membership, organs, and assessed
budget (Figure 1). Many specialized agencies follow the
assessments for the U.N. regular budget, while others use
their own formulas. The United States is a member of all
specialized agencies except for UNIDO and UNWTO.

Figure  I. U.N. Specialized Agencies
    Food and Agriculture Organization (FAt!
    International Civil Aviation Organization (ICAO)
    International Fund for Agricultural Development UFAD)
    Internatiinl L abor Olrganizations ILO)
    Internationa Maritime Orgarization (iMO)
    international Monetary Fund (IME)
    international Telecommunication Union IIU)
    U.N. Educational, Scientific & Cultural Organization (UNESCO)
  * U.N. Industrial Development Organization (UNIDO)
  * UN. World Tourism Organization (UNWTO)
    Universal Postal Union (UIPU)
    World Bank Group (WSG)
    World Health Organization (WHO}
    World Intellectual Property Organization ;WIPO)
    World Meteorological Organization (WMO)
           * miniates the United States is not a member.
Source: United Nations, adapted by CRS.

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