3. The present Charter shall come into force 30 days after the reception by the Secretary-General of the Organization of African Unity of the instruments of ratification or adherence of 15 Member States of the Organization of African Unity. ARTICLE 48 Amendment and Revision of the Charter 1. The present Charter may be amended or revised if any State Party makes a written request to that effect to the Secretary-General of the Organization of African Unity, provided that the proposed amendment is not submitted to the Assembly of Heads of State and Government for consideration until all the State Parties have been duly notified of it and the Committee has given its opinion on the amendment. 2. An amendment shall be approved by a simple majority of the State Parties. OAU Doc. CAB/LEG/24.9/49 (1990).