The United Nations Charter comes into effect.

The Charter of the United Nations, also referred to as the UN Charter, is the foundational treaty of the United Nations that founded the organization. It establishes the purposes, governing structure, and overall framework of the United Nations System, including its principal organs: the Secretariat, the General Assembly, the Security Council, the Economic and Social Council, the International Court of Justice, and the Trusteeship Council.

The UN Charter is an important part of public international law, and is the foundation for much of international law governing the use of force, pacific settlement of disputes, arms control, and other important functions of the maintenance of international peace and security.

United Nations Flags - cropped
United Nations Flags - cropped (Source: Wikimedia Commons)
UN charter logo
UN charter logo (Source: Wikimedia Commons)
United Nations Charter
United Nations Charter (Source: Wikimedia Commons)
UNITED NATIONS - PREAMBLE TO THE CHARTER OF THE UNITED NATIONS - NARA - 515901
UNITED NATIONS - PREAMBLE TO THE CHARTER OF THE UNITED NATIONS - NARA - 515901 (Source: Wikimedia Commons)

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Sources and further reading: Wikipedia — Charter of the United Nations (CC BY-SA). Images: Wikimedia Commons.