Page 48
Article 64. The Organization may, with respect to air matters within its competence directly affecting world security, by vote of the Assembly enter into appropriate arrangements with any general organization set up by the nations of the world to preserve peace.
Article 93. States other than those provided for in Articles 91 and 92(a) [1] may, subject to approval by any general international organization set up by the nations of the world to preserve peace, be admitted to participation in this Convention by means of a four-fifths vote of the Assembly and on such conditions as the Assembly may prescribe: provided that in each case the assent of any State invaded or attacked during the present war by the State seeking admission shall be necessary.
[1] Art. 91 provides for signatory States; art. 92(a) for "members of the United Nations and States associated with them, and States which remained neutral during the present world conflict."