The 30th session of the Council of the International Civil Aviation Organization (ICAO) took place in Montreal from January 28 to April 18, 1957. In its consideration of the problems of air navigation, the Council, upon a recommendation of the Third Air Navigation Conference as endorsed by the Air Navigation Commission, approved the establishment of an Airworthiness Committee and noted the proposal of the Air Navigation Commission for its work program. The Council also agreed that the Air Navigation Commission should on its own authority take action on the provisional AMC's (Acceptable Means of Compliance) prepared by the Airworthiness Committee. A report by the Air Navigation Commission on signals to be used when an aircraft has infringed on restricted airspace was endorsed by the Council, which decided that a paper on the legal aspects of the question should be prepared as soon as practicable. In accordance with a resolution of the tenth session of the Assembly, the Council approved the establishment of a panel of statistical experts nominated by the following countries: Australia, Canada, Egypt, France, Italy, Lebanon, the Netherlands, New Zealand, Pakistan, Spain, the United Kingdom, and the United States. In the legal field, the Council accepted the invitation of the Japanese government to hold the eleventh session of the Legal Committee in Tokyo in September 1957 and referred a report by the Air Transport Committee on the economic aspects of the liability limits on the proposed Convention on Aerial Collisions to the Legal Committee.