AIR NAVIGATION-DENMARK. ABTICLE 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 like- wise engaged. The areas above which air traffic is thus prohibited by either Party must be notified to the other Party. Each of the Parties may make the right to engage in air traffic over any of its possessions, territories or colonies, specified in sub- paragraphs (a) or (b) of Article 2, dependent upon the granting of a special permit and upon the fulfillment of special conditions and rules, provided that, subject to the right to reserve to national aircraft air commerce as described in the third paragraph of Article 5, no distinction in this matter is made between aircraft registered in its territory and aircraft registered in territory of the other Party. Each Party shall notify the other Party of its possession, territory or colony over which air traffic will not be permitted without a special permit. 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. ABTICLE 7 1857 Restricted areas. Any aircraft which finds itself over a. prohibited area. referred to I!trt=f!u:ter~cJ!e. in the first paragrarh of Article 6 shall, as soon as it is aware of the tally. n- fact, give the signa of distress prescribed in the Rules of the Air in force in the territory flown over and shall land as soon as possible at an aerodrome situa.ted in such territory outside of but as near as possible to such prohibited area. AlrrICLE 8 All aircraft shall carry clear and visible nationality and registra- Distinctive, etc., tion marks whereby they may be recognized during flIght. In addi- marks. tion, they must bear the name and address of the owner. All aircraft shall be provided with certificates of registration and Certificates required. 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 00 provided with all documents and in particular with the certificates and licenses prescribed by the regu- lations 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 certificates of airworthiness, certificates of competency and Valldlty of certlfi. licenses issued or rendered valid by one of the Parties to this ar- cates. rangement in respect of an aircraft registered in its territory or of the crew of such aircraft shall have the same validity in the terri- tory 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 Rights r.erved. within its own territory to refuse to recognize certificates of com- petency and licenses issued to nationals of that Party by the other Party.