INTERNATIONAL AGREEMENTS OTHER THAN TREATIES [54 STAT. 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 agree- ment 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 am instructed to state that the terms of the arrangement as com- municated to me are agreed to by my Government. ffective date. I am further instructed to inform you that my Government con- curs in your suggestion that the arrangement become effective on this date and will accordingly regard it as becoming effective on this date. I avail myself of the occasion to renew to you, Sir, the assurances of my highest consideration. DANIEL C. ROPER. The Right Honorable The SECRETARY OF STATE FOR EXTERNAL AFFAR8s, Ottawa. 1810
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