Article 85 United Nations Charter

Article 85 of the United Nations Charter is under Chapter XII: International Trusteeship System

Article 85

1. The functions of the United Nations with regard to trusteeship agreements for all areas not designated as strategic, including the approval of the terms of the trusteeship agreements and of their alteration or amendment, shall be exercised by the General Assembly.
2. The Trusteeship Council, operating under the authority of the General Assembly shall assist the General Assembly in carrying out these functions.

See also: Article 84 United Nations Charter