The Council of the International Civil Aviation Organization met in Montreal from May 22 to June 1, 1951 to consider items which needed to be completed before the opening of the fifth session of the ICAO Assembly on June 5, 1951. Annex 14 of the Convention Standards and Recommended Practices for Aerodromes as adopted differed in some respects from that submitted by the Air Navigation Division; the major change was the elimination of recommendations concerning the application and characteristics of the approach lighting system, Type B (high intensity). Unless a majority of the contracting states disapproved the Annex was to become effective on November 1, 1951 and to be implemented on June 1, 1952 in the case of airdromes used by international air services and on January 1, 1954 of other airdromes used by aircraft engaged in international air navigation. Sixteen amendments to Annex 3 of the Convention — Standards and Recommended Practices for Meteorological Codes — were adopted on the recommendation of the Meteorology Division. They were to become effective on October 1, 1951, and to be implemented on January 1, 1952. Action was also taken on the recommendations of the Committee on Performance of the Air and Operations Division. Report of the Air Navigation Division on its review of the implementation of regional plans in North America, South Pacific, South Atlantic, South American, and African-Indian Ocean Regions were approved. It was noted that in the first two regions there were no deficits in air navigation facilities and services which would seriously affect safety, efficiency or regularity of service.