Article 3 United Nations Charter
Article 3 of the United Nations Charter is under Chapter II: Membership
Article 3
The original Members of the United Nations shall be the states which, having participated in the United Nations Conference on International Organization at San Francisco, or having previously signed the Declaration by United Nations of 1 January 1942, sign the present Charter and ratify it in accordance with Article 110.
See also: Article 2 United Nations Charter