IRISH FREE STATE-AIR NAVIGATION September 291937 November 4, 1937 ARTICLE 6. Each of the Parties to this arrangement shall have the right to prohibit air traffic over certain areas of its territory, provided that no distinction in this matter is made between its aircraft engaged in international commerce and the aircraft of the other Party likewise engaged. The areas above which air traffic is thus prohibited by either Party must be notified to the other Party. Each of the Parties reserves the right under exceptional circum- stances in time of peace and with immediate effect temporarily to limit or prohibit air traffic above its territory on condition that in this respect no distinction is made between the aircraft of the other Party and the aircraft of any foreign country. ARTiCL 7. Any aircraft which finds itself over a prohibited area shall, as soon as it is aware of the fact, give the signal of distress prescribed in the Rules of the Air in force in the territory in which the prohibited area is situated and shall land as soon as possible at an aerodrome situated in such territory outside of but as near as possible to such prohibited area. ARTIcLE 8. All aircraft shall carry clear and visible nationality and registration marks whereby they may be recognized during flight. In addition, they must bear the name and address of the owner. All aircraft shall be provided with certificates of registration and of airworthiness and with all the other documents prescribed for air traffic in the territory in which they are registered. The members of the crew who perform, in an aircraft, duties for which a special permit is required in the territory in which such aircraft is registered, shall be provided with all documents and in particular with the certificates and licenses prescribed by the regula- tions in force in such territory. The other members of the crew shall carry documents showing their duties in the aircraft, their profession, identity and nationality. The certificate of airworthiness, certificates of competency and licences issued or rendered valid by one of the Parties to this arrange- ment in respect of an aircraft registered in its territory or of the crew of such aircraft shall have the same validity in the territory of the other Party as the corresponding documents issued or rendered valid by the latter. Each of the Parties reserves the right for the purpose of flight within its own territory to refuse to recognize certificates of compe- tency and licenses issued to nationals of that Party by the other Party. ARTICLE 9. The fuel and lubricants retained on board aircraft of either Party arriving in or leaving territory of the other Party shall be exempt from customs duty, even though the fuel and lubricants so retained are used by the aircraft on a flight in that territory, provided that such a flight is part of a journey from or to a place outside that territory. 321 Restricted areas. Aircraft over pro- hibited areas. Identification. Certificates of regis- tration, etc. Fuel and lubricants. exemption from cus- toms duty. 23918°-38- - 21
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