1809 54 STAT.] CANADA-AIR TRANSPORT SERVICES-AUG. 18 , 1939 The details of the application of the principle of reciprocity con- tained herein shall be the subject of amicable adjustment between the competent aeronautical authorities of the Parties to this Arrangement. ARTICLE IV Any air carrier enterprise of either Party applying for permission to operate in territory of the other Party shall be required to transmit its application through diplomatic channels in accordance with Article III (c) of the Air Navigation Arrangement effected by an exchange of notes between the two Parties, signed on July 28, 1938. The air carrier enterprises of each Party will be required to qualify before the competent aeronautical authorities of the other Party un- der the latter's applicable laws and regulations before being permitted to engage in the operations contemplated by this Arrangement, and upon so qualifying will be issued permits or licences by such authorities accordingly. ARTICLE V The terms of the permits referred to in Article IV, the airports to be used by the respective services, the routes or airways to be flown within the respective territories of the Parties between the designated airports, and other appropriate details of the conduct of the air transport services contemplated by this Arrangement, shall be de- termined by the competent aeronautical authorities of the Parties. Any permit issued by the competent aeronautical authorities for the air transport services contemplated hereunder shall be valid only so long as the holder thereof shall be authorized by its own Government to engage in the service envisaged by such permit. The holding of such permit shall be subject to compliance by the holder with all applicable laws of the issuing Government and with all valid rules, regulations and orders issued thereunder. Such permit may not be revoked for any cause other than non-compliance with such laws, rules, regulations or orders or for such reasons as the public interest may require. ARTICLE VI Each of the Parties hereto agrees not to impose, and to use its best efforts to prevent the imposition of, any restrictions or limitations as to airports, airways or connections with other transportation serv- ices and facilities in general to be utilized within its territory which might be competitively or otherwise disadvantageous to the air car- rier 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.
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