United Nations Charter in the context of "Nongovernmental organization"

Chapter V of the United Nations Charter sets out the UN Security Council's powers to maintain peace. It gives the Security Council the authority to "determine the existence of any threat to the peace, breach of the peace, or act of aggression" and to take military and nonmilitary action to "restore international peace and security.”

The United Nations General Assembly has granted observer status to international organizations, entities, and non-member states, to enable them to participate in the work of the United Nations General Assembly, though with limitations. The General Assembly determines the privileges it will grant to each observer, beyond those laid down in a 1986 Conference on treaties between states and international organizations. Exceptionally, the European Union (EU) was in 2011 granted the right to speak in debates, to submit proposals and amendments, the right of reply, to raise points of order and to circulate documents, etc. As of May 2011, the EU is the only international organization to hold these enhanced rights, which has been likened to the rights of full membership, short of the right to vote.

Observer status may be granted by a United Nations General Assembly resolution. The status of a permanent observer is based purely on practice of the General Assembly, and there are no provisions for it in the United Nations Charter. The practice is to distinguish between state and non-state observers. Non-member states are members of one or more specialized agencies, and can apply for permanent observer state status. Non-state observers are the international organizations and other entities.

The Westphalian system, also known as Westphalian sovereignty, is a principle in international law that each state has exclusive sovereignty over its territory. The principle developed in Europe after the Peace of Westphalia in 1648, based on the state theory of Jean Bodin and the natural law teachings of Hugo Grotius. It underlies the modern international system of sovereign states and is enshrined in the United Nations Charter, which states that "nothing ... shall authorize the United Nations to intervene in matters which are essentially within the domestic jurisdiction of any state."

According to the principle, every state, no matter how large or small, has an equal right to sovereignty. Political scientists have traced the concept to the eponymous peace treaties that ended the Thirty Years' War (1618–1648) and Eighty Years' War (1568–1648). The principle of non-interference was further developed in the 18th century. The Westphalian system reached its peak in the 19th and 20th centuries, but has faced recent challenges from advocates of humanitarian intervention.

Expulsion from the United Nations is a procedure under Article 6, Chapter II of the United Nations Charter when a member state of the United Nations can be expelled from the organization. This can be done when a member state has persistently violated the principles of the United Nations Charter. No state has ever been expelled from the UN, although the exclusion of the Republic of China (replaced by the People's Republic of China) through General Assembly Resolution 2758 and the suspension of South Africa due to its apartheid laws had a similar effect.

Separately, Article 5 of the Charter allows for suspension of a state's membership through the same procedure.

A non-governmental organization (NGO) is an entity that is not part of the government. This can include non-profit and for-profit entities. An NGO may get a significant percentage or even all of its funding from government sources. An NGO typically is thought to be a nonprofit organization that operates partially independent of government control. Nonprofit NGOs often focus on humanitarian or social issues but can also include clubs and associations offering services to members. Some nonprofit NGOs, like the World Economic Forum, may also act as lobby groups for corporations. Unlike international organizations (IOs), which directly interact with sovereign states and governments, NGOs are independent from them.

The term as it is used today was first introduced in Article 71 of the newly formed United Nations Charter in 1945. While there is no fixed or formal definition for what NGOs are, they are generally defined as nonprofit entities that are independent of government management or direction—although they may receive government funding.

The secretary-general of the United Nations (UNSG or UNSECGEN) is the chief administrative officer of the United Nations and head of the United Nations Secretariat, one of the six principal organs of the United Nations.

The role of the secretary-general and of the secretariat is laid out by Chapter XV (Articles 97 to 101) of the United Nations Charter. However, the office's qualifications, selection process and tenure are open to interpretation; they have been established by custom.

Chapter IV of the United Nations Charter contains the Charter's provisions dealing with the UN General Assembly (UNGA), specifically its composition, functions, powers, and procedures.