The Council held a post-assembly session June 21 to 29, 1951 in which air navigation problems figured most prominently. The Council established universal radio telephony procedures recommended by the Airworthiness and the Communications Divisions during their fourth sessions and incorporated them into Amendment 4 to Annex 10 (Aeronautical Telecommunications) of Standards and Recommended Practices for implementation November 1, 1951. The Air Navigation Commission was authorized to establish a small standing committee, proposed by the Airworthiness and Operations Divisions, to make tentative amendment to Annexes 6 and 8 (Operation of Aircraft, Airworthiness of Aircraft). The Council also approved the implementation January 1, 1952 of the Revised Supplementary Regional Procedures in Meteorology. On the advice of the Air Navigation Commission, the Council approved the proposal by the United States and France to include the New York-Paris circuit in the Aeronautical Fixed Telecommunications Network of the European and the Mediterranean Region, subject to review by the European and Mediterranean Regional Air Navigation Meeting in February. Amendments 23 to 28 to Annex 4 (Aeronautical Charts) were adopted; and unless disapproved by a majority of contracting states they would become effective November 1, 1951 and implemented January 1, 1952. The Council endorsed the establishment of regional training centers and directed the Secretary-General to encourage such development and particularly to urge the governments of India, Pakistan, and Egypt to consider further development of centers of Allahabad, Nawabshar or Karachi, and Cairo, not only for the benefit of their own nations, but also for that of neighboring states. Noting the development of prohibited, restricted, and danger areas along international air routes, the Council asked all contracting states to issue communications prior to boundary changes. Mohammed El Hakeem (Egypt) and A. C. Carter (United Kingdom) were appointed to the Air Navigation Commission. In conclusion, the third report of the Organization's technical assistance program was approved with its estimated $900,000 budget for 1952 for transferral to the United Nations. The retirement of the Secretary-General, Albert Roper, was deferred until December 31, 1951.