Under the charter of the United Nations Organization, states pledged to develop friendly relations among nations based on respect for the principle of equal rights and self-determination of peoples, to fulfill in good faith the obligations assumed under the charter, to observe the principle of sovereign equality of all UN members, to resolve their international disputes by peaceful means in such a way as not to jeopardize the international peace, security and justice, to refrain in their international relations from the threat of force or using the force against the territorial integrity or political independence of any state, or in any other way, commit acts inconsistent with the purposes of the United Nations (UN). In addition, the UN Charter approved the principle of non-intervention in matters, essentially included within the domestic jurisdiction of any state (this principle, however, does not affect the application of compulsory measures on the basis of the Charter).
The basic principles of the UN Charter were confirmed and expanded in the declaration on principles of International Law, concerning friendly relations and cooperation among states in accordance with the UN Charter (October 24, 1970), and later in the Final Act of the Conference on Security and Cooperation in Europe, adopted in 1975 in Helsinki.
The declaration on principles of International Law concerning friendly relations and cooperation among states in accordance with the Charter of the United Nations (October 24, 1970) provided that: States shall refrain in their international relations from the threat with force or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the purposes of the United Nations.
States shall resolve their international disputes by peaceful means in such a way as not to endanger international peace, security and justice. States are bound by the Charter not to interfere in matters within the domestic jurisdiction of any state. States are obliged to cooperate with each other in accordance with the UN Charter.
By virtue of the principle of equal rights and self-determination of peoples, envisaged in the charter, all peoples have the right to freely determine their political status and pursue their economic, social and cultural development without outside interference, and every state is obliged to respect this right in accordance with the provisions of the charter. All states enjoy sovereign equality, they have the same rights and obligations and are full-fledged members of international society, regardless of differences of an economic, social, political or other nature. Each state is obliged to fulfill in good faith the obligations assumed by it in accordance with the UN Charter, arising from the generally recognized principles and norms of international law, as well as arising from international treaties valid in accordance with the generally recognized principles and norms of international law. All the above-mentioned principles have been repeatedly confirmed in other declarations and other foundational documents contained in the resolutions of the UN General Assembly. Herewith, it was found that, in interpretation and application, the above-mentioned principles are interrelated and each principle must be considered in the context of all other principles.