The Council convened for its sixth session on January 18, 1949 at ICAO headquarters in Montreal. It adopted a resolution establishing an Air Navigation Commission, which was to assume the functions of the former Air Navigation Committee. The commission was to consist of twelve members, with Argentina, Brazil, Canada, China, France, Netherlands, Sweden, United Kingdom, and the United States having already appointed representatives. Annex 7 (Standards and Recommended Practices for Aircraft Nationality and Registration Marks) to the Convention of International Civil Aviation was adopted by the Council, and approval was granted to the provisional agenda of the third ICAO Assembly, scheduled to open in Montreal on June 7, 1949. Also approved by the Council was the convening in London on April 20 of a combined conference to deal with the problems of North Atlantic weather stations, joint support to Greece in respect to the development of the Ellinikon airport, and provision of essential air navigation services requested by Denmark for its Loran station in the Faeroe Islands. Approval was given to the convening on April 11 in London of a meeting of experts to consider revision of the communications network for carrying meteorological information in the North Atlantic region.