54 STAT.] CANADA-AIR TRANSPORT SERVICES-AUG. 18 , 1939 to airports, airways or connections with other transportation services and facilities in general to be utilized within its territory which might be competitively or otherwise disadvantageous to the air carrier enterprises of the other Party. ARTICLE VII The aircraft operated by United States air carrier enterprises shall conform at all times with the airworthiness requirements prescribed by the competent aeronautical authorities of the United States for aircraft employed in air transportation of the character contemplated by this Arrangement. The aircraft operated by Canadian air carrier enterprises shall conform at all times with the airworthiness requirements prescribed by the competent aeronautical authorities of Canada for aircraft em- ployed in air transportation of the character contemplated by this Arrangement. The competent aeronautical authorities of the Parties hereto may communicate with a view to bringing about uniformity of safety standards for the operations contemplated by this Arrangement and compliance therewith, and whenever the need therefor appears the Parties may enter into an agreement prescribing such uniform safety standards. ARTICLE VIII The matter of the transportation of mail shall be subject to agreement between the competent authorities of both Parties. ARTICLE IX The operations contemplated hereunder shall be conducted subject to the applicable terms of the Air Navigation Arrangement effected by an exchange of notes between the two Parties signed on July 28, 1938. ARTICLE X This Arrangement shall remain in force for a period of two years and thereafter until terminated on six months notice given by either Government to the other Government. I shall be glad to have you inform me whether it is the understand- ing of your Government that the terms of the arrangement agreed to in the negotiations are as above set forth. If so, it is suggested that the arrangement become effective on this date. If your Government concurs in this suggestion the Government of Canada will regard it as becoming effective on this date. Accept, Sir, the renewed assurances of my highest consideration. W. L. MACKENZIE KiNG Secretary of State for Ewternal Affairs Canada The Honourable The UNITED STATES MINISTER TO CANADA, Ottawa. Airworthiness re- quirements. Mail transporta. tion. Conduct of opera- tions. 53 Stat. 1925. Duration; termina- tion. Effective date 1807
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